www.honeywell.com/sensing 1
You know us as a leader, whether you’ve known us as MICRO
SWITCH™ or Honeywell Sensing and Control (S&C). In 1968,
we revolutionized the industry with the first solid-state keyboard
combining Hall-effect sensing and associated electronics in
a single circuit. Today, the Honeywell S&C family of magnetic
position sensors includes digital and analog Hall-effect position,
magnetoresistive digital, Hall-effect vane, gear-tooth, and Hall-
effect basic switches and magnets. These high-speed, extended
life sensors are often directly compatible with other electronic
FEATURES
LOW POWER HALL-EFFECT
SENSOR ICS - DIGITAL
SL353 Series.
Features: Energy efcient • Push-pull
output • Non-chopper stabilized design
• Omnipolar magnetics • Thermally
balanced integrated circuit • Subminiature
package size • Simple activation from a
North pole or a South pole • Tape and reel
packaging
Benets: Supply voltage as low as 2.2
Vdc, combined with very low average
current of 1.8 μA typ., reduces power
consumption, provides extended battery
life, and promotes energy efficiency.
Push-pull output does not require external
pull-up resistor, simplifying interface
with common electrical circuits and
potentially reducing PC board space and
costs to the customer. Does not utilize
chopper stabilization, eliminating the
noise generated by products using this
technique, meaning that customers do not
need filters to compensate for the noise.
Omnipolar capability with high and low duty
cycle options allows for use in a variety
of potential applications with low power
requirements and/or battery operation.
Thermally balanced integrated circuit
provides for stable operation over a wide
Magnetic Sensors
Line Guide
continued on page 9
temperature range, of -40° to 85 °C
[-40° to 185 °F]. SOT-23 subminiature
package requires less PCB space, allowing
for use in smaller assemblies. North pole
or South pole operation does not require
the magnet polarity to be identified, making
installation easier and potentially reducing
system costs. Supplied on tape and reel
which allows for a compact design with
automated component placement, helping
to reduce manufacturing costs. Potential
applications include motion control, lid
closure detection, presence-absence,
metering, and displacement sensing on
battery-operated, mobile equipment such
as computer notebooks, scanners, hand-
held industrial computers, instrumentation
and appliances.
HALL-EFFECT SENSOR ICS -
DIGITAL
SS30AT/SS40A/SS50AT.
Features: Bipolar magnetics • Sinking
output • High output current capability
• High speed capability • Reverse
polarity protection • Small through-hole
and surface mount (SOT-23 and SOT-89)
packages • Tape and reel available
Benets: Integrated circuitry provides
enhanced temperature stability in a robust
design. Thermally balanced integrated
circuit over full temperature range. Built-in
regulator provides stable operation over
supply voltage range. Open-collector
sinking output voltage easily interfaces with
wide variety of electronic circuits. Internal
circuitry prevents sensor damage in case
supply voltage polarity is accidentally
reversed. Potential applications include
speed and RPM sensing, brushless dc
motor commutation, motor and fan control,
magnetic encoding, disc speed, tape
rotation, and flow-rate sensing.
SS311PT/SS411P.
Features: Bipolar magnetics • Enhanced
sensitivity • Built-in pull-up resistor • Low
voltage: 2.7 Vdc to 7 Vdc • Subminiature
package size (SS311PT) • Through-hole
and surface-mount (SOT-23 and SOT-89)
packages • Cost effective
Benets: Enhanced sensitivity often allows
for use of smaller, less expensive magnets.
Built-in pull-up resistor easily interfaces with
common electronic circuits without adding
external components, helping to reduce
total system cost. 2.7 Vdc to 7 Vdc supply
voltage range allows use in low voltage
applications, promoting energy efficiency.
circuits, responding to the presence or the interruption of a
magnetic field by producing a proportional output. Gear-tooth
and other packaged Hall-effect speed and direction sensors
sense movements of a ferrous metal target. Digital and analog
“sensor-only” devices are operated by a permanent magnet
or electromagnet, while actuation mode depends on the type
of magnets used. A vane passing through a gap or a magnet
mounted on a plastic plunger operates integral magnet position
sensors.
2 www.honeywell.com/sensing
SL353 Series
Description micropower omnipolar digital Hall-effect sensor IC
Magnetic actuation type omnipolar
Package material and style
plastic surface mount (SOT-23)
Supply voltage range 2.2 Vdc to 5.5 Vdc
Supply current SL353LT: 1.8 µA typ. at 2.8 Vdc
SL353HT: 0.33 mA typ. at 2.8 Vdc
Output type digital
Operating temperature range -40 °C to 85 °C [-40 °F to 185 °F]
SS30AT/SS40A/SS50AT SS340RT/SS440R Series
Description low-cost bipolar Hall-effect digital
sensor IC unipolar Hall-effect digital sensor IC
Magnetic actuation type bipolar unipolar: SS340RT: North pole
unipolar: SS440R: South pole
Package material and style
SS30AT: plastic surface mount (SOT-23)
SS40A: plastic radial lead
SS50AT: plastic surface mount
(SOT-89B)
SS340RT: plastic surface mount (SOT-23)
SS440R: plastic radial lead
Supply voltage range 4.5 Vdc to 24 Vdc 3 Vdc to 24 Vdc, except SS340RT
>125 °C [257 °F]: 3 Vdc to 12 Vdc
Supply current 10 mA max. 8 mA
Output type digital sinking digital sinking
Operating temperature range
SS40A: -40 °C to 125 °C
[-40 °F to 257 °F]
SS30AT/SS50AT: -40 °C to 125 °C
[-40 °F to 257 °F]
SS440R (3 Vdc to 24 Vdc):
-40 °C to 150 °C [-40 °F to 302 °F]
SS340RT (3 Vdc to 24 Vdc):
-40 °C to 125 °C [-40 °F to 257 °F]
SS340RT (3 Vdc to 12 Vdc):
-40°C to 150 °C [-40°C to 302 °F]
Precision. Repeatability.
Ruggedness.
Each Honeywell S&C magnetic
sensor IC is engineered to
provide top performance:
Hall-effect sensor ICs are
constructed from a thin sheet of
conductive material with output
connections perpendicular to
the direction of current flow.
Magnetoresistive sensor ICs
have a built-in magnetoresistive
bridge integrated on silicon,
encapsulated in a plastic
package. The sensitive
integrated circuit responds
to low (25 G max.) fields at
distances up to 1 inch.
Hall-effect vane sensor ICs
consist of a magnet and a Hall-
effect sensor inside a rugged
plastic housing. Different
package styles provide
mounting flexibility.
Gear tooth sensors use a
magnetically biased Hall-
effect IC to sense movement
of ferrous metal targets. The
specially designed IC is sealed
in a durable plastic probe-type
package.
Additional built-in benets:
true solid state, extended
life (30 billion operations in a
module test program), high
speed operation (over 100
kHz), stationary input (zero
speed), no moving parts, logic
compatible output, and broad
temperature range (-40 °C to
150 °C, -40 °F to 302 °F).
Magnetic Sensors Line Guide
Low power Hall-
effect sensor ICs -
digital
Hall-effect sensor
ICs - digital
www.honeywell.com/sensing 3
SS340RT/SS440R Series SS345PT/SS445P SS351AT/SS451A/SS551AT
Description unipolar Hall-effect digital sensor IC unipolar Hall-effect digital sensor IC omnipolar Hall-effect digital sensor IC
Magnetic actuation type unipolar: SS340RT: North pole
unipolar: SS440R: South pole unipolar omnipolar
Package material and style SS340RT: plastic surface mount (SOT-23)
SS440R: plastic radial lead
SS345PT: plastic surface mount (SOT-23)
SS445P: plastic radial lead
SS351AT: plastic surface mount (SOT-23)
SS451A: plastic radial lead
SS551AT: plastic surface mount
(SOT-89B)
Supply voltage range 3 Vdc to 24 Vdc, except SS340RT
>125 °C [257 °F]: 3 Vdc to 12 Vdc 2.7 Vdc to 7.0 Vdc
3 Vdc to 24 Vdc, except
SS351AT >125 °C [257 °F]:
3 Vdc to 12 Vdc
Supply current 8 mA 14 mA 9 mA
Output type digital sinking digital sinking digital sinking
Operating temperature
range
SS440R (3 Vdc to 24 Vdc):
-40 °C to 150 °C [-40 °F to 302 °F]
SS340RT (3 Vdc to 24 Vdc):
-40 °C to 125 °C [-40 °F to 257 °F]
SS340RT (3 Vdc to 12 Vdc):
-40°C to 150 °C [-40°C to 302 °F]
-40 °C to 150 °C [-40 °F to 302 °F]
SS451A/SS551AT (3 Vdc to 24 Vdc):
-40 °C to 150 °C [-40 °F to 302 °F]
SS351AT (3 Vdc to 24 Vdc):
-40 °C to 125 °C [-40 °F to 257 °F]
SS351AT (3 Vdc to 12 Vdc):
-40 °C to 150 °C [-40 °C to 302 °F]
SS360NT/SS360ST/SS460S SS361CT/SS461C
Description high sensitivity bipolar latching digital Hall-effect sensor IC high sensitivity bipolar latching, Hall-effect digital sensor IC
Magnetic actuation type bipolar latching bipolar latching
Package material and style SS360NT/SS360ST: plastic surface mount (SOT-23)
SS460: plastic radial lead
SS361CT: plastic surface mount
(SOT-23
)
SS461C: plastic radial lead
Supply voltage range 3 Vdc to 24 Vdc 4 Vdc to 24 Vdc
Supply current 8 mA max. 6 mA max.
Output type digital digital sinking
Operating temperature
range -40 °C to 125 °C [-40 °F to 257 °F] -40 °C to 125 °C [-40 °F to 257 °F]
Hall-effect sensor
ICs - digital
Hall-effect sensor
ICs - digital
4 www.honeywell.com/sensing
Magnetic Sensors Line Guide
SS41/SS51T
Series
SS421 Series SS42R SS46 VF526DT
Description bipolar Hall-effect
digital sensor IC
adjustable bipolar Hall-
effect digital sensor
IC with underspeed
detection
bipolar latching
Hall-effect digital
sensor IC with dual
active high/active low
complementary outputs
bipolar latching Hall-
effect digital sensor IC
bipolar latching dual
Hall-effect digital
sensor IC with speed
and direction outputs
Magnetic actuation type bipolar bipolar bipolar latching bipolar latching bipolar latching
Package material and style
SS41: plastic radial
lead
SS51T: plastic surface
mount (SOT-89)
plastic radial lead plastic radial lead plastic radial lead
plastic surface mount
(SOT-89)
Supply voltage range 4.5 Vdc to 24 Vdc 4.5 Vdc to 16 Vdc 4.5 Vdc to 16 Vdc 4.5 Vdc to 24 Vdc 3.4 Vdc to 24 Vdc
Supply current 15 mA max. 15 mA max. 11 mA max. 10 mA max. OFF: 12 mA max
ON: 14 mA max
Output type digital sinking digital sinking digital sinking or
sourcing digital sinking digital voltage, dual
open collector sinking
Operating temperature range -40 °C to 150 °C
[-40 °F to 302 °F]
-40 °C to 105 °C
[-40 °F to 221 °F]
0 °C to 100 °C
[32 °F to 212 °F]
-40 °C to 150 °C
[-40 °F to 302 °F]
-40 °C to 125 °C
[-40 °F to 257 °F]
Hall-effect sensor
ICs - digital
SS361RT/SS461R SS400/SS500 Series
Description Hall-effect digital sensor IC
SS400: Hall-effect digital sensor IC
SS500: unipolar/bipolar/bipolar latching Hall-effect digital sensor
IC
Magnetic actuation type bipolar latching unipolar, bipolar, bipolar latching
Package material and style SS361RT: plastic surface mount
(SOT-23
)
SS461R: plastic radial lead
SS400: plastic radial lead
SS500: plastic surface mount (SOT-89)
Supply voltage range 3 Vdc to 18 Vdc, except SS361RT >125 °C [257 °F]: 3 Vdc to 12
Vdc 3.8 Vdc to 30 Vdc (inclusive)
Supply current 8 mA SS400: 10 mA
SS500: 8.7 mA at 5 Vdc
Output type digital sinking digital sinking
Operating temperature
range
SS361RT (3 V to 12 V) & SS461R: 40 °C to 150 °C [-40 °C to
302 °C]
SS361RT (3 V to 18 V):
-40 °C to 125 °C
[-40 °F to 257 °F]
-40 °C to 150 °C
[-40 °F to 302 °F]
Hall-effect sensor
ICs - digital
www.honeywell.com/sensing 5
2SS52M Series SS552MT VF401 APS00B
Description omnipolar magnetoresistive
digital sensor IC
omnipolar magnetoresistive
digital sensor IC
2-wire MR fine-pitch ring
magnet sensor IC
high resolution magnetic
displacement sensor IC
Magnetic actuation type omnipolar omnipolar differential bridge analog, saturated mode
Package material and style plastic radial leads plastic SMT (SOT-89) plastic flat, TO-92-style plastic surface mount (SO-8)
Supply voltage range 3.8 Vdc to 30 Vdc 3.8 Vdc to 30 Vdc 4.5 Vdc to 16 Vdc 1 Vdc to 12 Vdc
Supply current 11 mA max. 11 mA max. Icc operate: 16.8 mA max.
Icc release: 8.4 mA max. 7 mA max.
Output type digital sinking digital sinking digital current source
dual analog voltages
responding to changes in
magnetic field angle
Operating temperature range -40 °C to 150 °C
[-40 to 302 °F]
-40 °C to 150 °C
[-40 to 302 °F]
-40 °C to 150 °C
[-40 °F to 302 °F]
-40 °C to 150 °C
[-40 °F to 302 °F]
Magnetoresistive
sensor ICs
91SS Series SS490/SS491B Series SS39ET/SS49E/
SS59ET Series
SS94 Series
Description Hall-effect linear sensor IC Hall-effect linear sensor IC Hall-effect linear sensor IC Hall-effect linear sensor IC
Magnetic actuation type linear linear linear linear
Package material and style ceramic SIP, ceramic with
solder bumps
SS490: plastic radial
lead, plastic surface pack,
ammopack styles T2 and T3
SS491B: plastic radial lead
SS39ET: plastic surface mount
(SOT-23)
SS49E: plastic radial lead
(SOT-92-style)
SS59ET: plastic surface mount
(SOT-89)
ceramic SIP, ceramic with
solder bumps
Supply voltage range 8 Vdc to 16 Vdc 4.5 Vdc to 10.5 Vdc 2.7 Vdc to 6.5 Vdc 4.5 Vdc to 12.6 Vdc
Supply current 19 mA max. 10 mA 10 mA max. 30 mA max.
Output type ratiometric sourcing ratiometric sinking or
sourcing ratiometric sourcing ratiometric sinking or
sourcing
Operating temperature range -40 °C to 150 °C
[-40 °F to 302 °F]
-40 °C to 150 °C
[-40 °F to 302 °F]
-40 °C to 100 °C
[-40 °F to 212 °F]
-40 °C to 150 °C
[-40 °F to 302 °F]
Hall-effect sensor
ICs - linear
6 www.honeywell.com/sensing
Magnetic Sensors Line Guide
SR3 Series SR4 Series
Description Hall-effect digital position sensor magnetoresistive digital position sensor
Package material and style plastic threaded barrel plastic threaded barrel
Magnetic actuation unipolar, bipolar omnipolar
Operation proximity to external magnet proximity to external magnet
Supply voltage range 4.5 Vdc to 24 Vdc 3.8 Vdc to 30 Vdc
Supply current 10 mA 11 mA
Output type digital sinking digital sinking
Operating temperature range -40 °C to 85 °C [-40 °F to 185 °F] -40 °C to 85 °C [-40 °F to 185 °F]
Value-added Hall-
effect sensors
1GT Series SR16/SR17 Series
Description Hall-effect sensor low-cost Hall-effect vane sensor
Package material and style plastic probe SR16: plastic dual tower with variety of terminations
SR17: plastic side-mount wire exit
Magnetic actuation – –
Operation ferrous metal actuator ferrous metal actuator
Supply voltage range 4.5 Vdc to 26.5 Vdc (inclusive) 3.8 Vdc to 30 Vdc
Supply current 20 mA max. 10 mA max.
Output type digital sinking digital sinking
Operating temperature range -40 °C to 150 °C [-40 °F to 302 °F] -20 °C to 85 °C [-4 °F to 185 °F]
Value-added Hall-
effect sensors
103SR Series (Digital) 103SR Series (Linear)
Description Hall-effect digital position sensor Hall-effect linear position sensor
Package material and style aluminum threaded barrel aluminum threaded barrel
Magnetic actuation unipolar, bipolar, bipolar latch linear
Operation proximity to external magnet proximity to external magnet
Supply voltage range 4.5 Vdc to 24 Vdc 4.5 Vdc to 10.5 Vdc
Supply current 4 mA to 10 mA (inclusive) 7 mA
Output type digital sinking ratiometric sinking/sourcing
Operating temperature range -40 °C to 100 °C [-40 °F to 212 °F] -40 °C to 100 °C [-40 °F to 212 °F]
Value-added Hall-
effect sensors
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1GT Series
Description single Hall-effect sensor
Supply voltage range 4.5 Vdc to 26.5 Vdc (inclusive)
Supply current 20 mA
Output type digital sinking (open collector)
Operating frequency range 0 Hz to 25 kHz (inclusive)
Operating temperature range -40 °C to 150 °C [-40 °F to 302 °F]
LCZ Series SNDH-T Series SNDH-H Series
Description single Hall-effect zero speed sensor dual differential Hall-effect quadrature
speed and direction sensor Hall-effect speed sensor
Housing stainless steel n/a stainless steel or plastic
Supply voltage range 4.5 Vdc to 26 Vdc 4.5 Vdc to 18 Vdc 4 Vdc to 24 Vdc (inclusive)
Supply current 20 mA 18 mA max. 20 mA max.
Output type digital sinking square wave digital sinking
Operating frequency range 0 Hz to 15 kHz 1 Hz to 15 kHz 0 Hz to 15 kHz, 2 Hz to 15 kHz
Operating temperature range -40 °C to 125 °C [-40 °F to 257 °F] -40 °C to 150 °C [-40 °F to 302 °F] -40 °C to 150 °C [-40 °F to 302 °F]
Speed and
direction sensors
Speed and
direction sensors
ZH10 GTN Series SNDJ Series
Description single Hall-effect zero speed sensor single Hall-effect sensor
zero speed Hall-effect sensor,
differential Hall-effect sensor,
dual Hall-effect sensor
Housing aluminum n/a n/a
Supply voltage range 4 Vdc to 24 Vdc 8 Vdc to 32 Vdc (inclusive) 8 Vdc to 32 Vdc (inclusive)
Supply current 6 mA 40 mA 10 mA to 20 mA max. (inclusive)
Output type digital sinking digital sinking (open collector)
square wave and one direction signal,
square wave signal from NPN output
transistor with 2.7 kOhm pull-up, dc-
coupled to supply,
square wave signal from push-pull stage,
dc-coupled to supply
Operating frequency range 0 Hz to 15 kHz 2 Hz to 9 kHz 0 Hz to 15 kHz (inclusive)
Operating temperature range -40 °C to 125 °C [-40 °F to 257 °F] -40 °C to 125 °C [-40 °F to 257 °F] -20 °C to 100 °C [-4 °F to 212 °F]
Speed and
direction sensors
8 www.honeywell.com/sensing
VRS High Temperature Series VRS Power Output Series
Output voltage range 4.7 Vp-p to 125 Vp-p (inclusive) 70 Vp-p (inclusive)
Housing diameter 5/8 in, 3/8 in, 1/4 in 5/8 in
Housing material and style stainless steel threaded stainless steel threaded
Termination MS3106 connector, preleaded MS3106 connector, preleaded
Operating temperature range -73 °C to 230 °C [-100 °F to 450 °F] (inclusive) -55 °C to 120 °C [-67 °F to 250 °F]
Variable reluctance
speed sensors
VRS High Output Series VRS High Resolution Series
Output voltage range 8 Vp-p to 190 Vp-p (inclusive) 17 Vp-p to 170 Vp-p
Housing diameter 5/8 in, 3/8 in 5/8 in, 3/8 in
Housing material and style stainless steel threaded or smooth stainless steel threaded
Termination MS3106 connector, preleaded MS3106 connector, preleaded
Operating temperature range -55 °C to 150 °C [-67 °F to 300 °F] (inclusive) -55 °C to 120 °C [-67 °F to 250 °F]
Variable reluctance
speed sensors
VRS General Purpose Series VRS Hazardous Location Series
Output voltage range 8 Vp-p to 40 Vp-p (inclusive) 30 Vp-p to 60 Vp-p (inclusive)
Housing diameter 5/8 in, 3/8 in, 1/4 in, 10/32 in 3/4 in, 5/8 in
Housing material and style stainless steel threaded or smooth stainless steel threaded
Termination MS3106 connector, preleaded MS3106 connector, preleaded
Operating temperature range -55 °C to 120 °C [-67 °F to 250 °F] (inclusive) -73 °C to 120 °C [-100 °F to 250 °F] (inclusive)
Variable reluctance
speed sensors
www.honeywell.com/sensing 9
Subminiature package size (SS311PT)
allows for compact design. SS311PT is
available on tape and reel for high volume,
automated component placement, helping
to reduce manufacturing costs. Potential
applications include speed and RPM
sensing, brushless dc motor commutation,
tachometer, counter pickup, motor and
fan control, flow-rate sensing, and robotics
control.
SS340RT/SS440R Series.
Features: Unipolar magnetics: SS340RT
responds to North pole; SS440R responds
to South pole • Subminiature package size
(SS340RT) • Multiple magnetic sensitivities
(high, medium and low) • Low voltage
3 V capability • Built-in reverse polarity
protection • Thermally balanced integrated
circuit over full temperature range
Benets: Supplied in three different
magnetic sensitivities to meet wide range
of potential applications. The SS341RT and
SS441R offer the highest sensitivity, with
a typical operating point of 85 G at 25 °C
[77 °F]; the SS343RT and SS443R offer
medium sensitivity with 125 G typical at
25 °C [77 °F]; the SS349RT and SS449R
offer the lowest sensitivity, requiring 350
G typical to operate at 25 °C [77 °F]. The
SS340RT’s small size requires less PC board
space, allowing it to be used in smaller
assemblies. Its 3 V capability allows for
use in low voltage applications, promoting
energy efficiency. The SS340RT Series is
available on tape and reel (3000 units per
reel); the SS440R Series is available in a
bulk package (1000 units per bag). Potential
applications include door or lid closure
detection, speed and RPM sensing in tness
equipment, ow rate sensing, damper or
valve position control, cylinder position
monitoring, float-based fluid level sensing
and printer head position sensing.
SS345PT/SS445P.
Features: unipolar magnetics
• Subminiature package size (SS345PT)
• Tape and reel packaging (SS345PT)
• Small, at TO-92-style package (SS445P)
• Simple activation from a North pole
(SS345PT) or a South pole (SS445P) • Low
voltage 2.7 V capability • Built-in pull-up
resistor
Benets: Subminiature package size
(SS345PT) uses less space on the PCB
than standard Hall-effect sensor packages
such as TO-92 or SOT-89, allowing for
use in smaller assemblies. Tape and reel
packaging (SS345PT) allows for automated
component placement, helping to reduce
manufacturing costs. Small, flat TO-92-style
package (SS445P) is also available. 2.7
Vdc to 7 Vdc capability allows for use in
low voltage applications, promoting energy
efciency. Built-in pull-up resistor can easily
interface with common electronic circuits
without adding external components,
helping to reduce total system cost. Simple
activation from a North pole (SS345PT) or a
South pole (SS445P). Potential applications
include speed and RPM sensing in tness
equipment, ow rate sensing in appliances
and industrial processes, displacement
sensor in hospital beds and medical
equipment and medication bin monitor on
portable drug carts.
SS351AT/SS451A/SS551AT.
Features: Omnipolar magnetics
• Small through-hole and surface mount
(SOT-23 and SOT-89B) packages
• Simple activation from either South pole
or North pole • Low voltage 3 V capability
• Built-in reverse polarity protection
• Thermally balanced integrated circuit
over full temperature range
Benets: Available in three package
styles: SS351AT in the subminiature
SOT-23 surface mount; the SS551AT in
the SOT-89B surface mount, and the
SS451A in the leaded, flat TO-92-style.
The SS351AT’s small size requires less
PC board space, allowing it to be used in
smaller assemblies. Its 3 Vdc capability
allows for use in low voltage applications,
promoting energy efficiency. Subminiature
package size (SS351AT) supplied on tape
and reel allows for a compact design with
automated component placement, helping
to reduce manufacturing costs. Operated
by a North pole or a South pole, these
products do not require the magnet polarity
to be identified, thus making the installation
easier and potentially reducing system
cost. Built-in reverse polarity protection
protects the device from potential damage
during installation. Thermally balanced
integrated circuit provides for stable
operation over a wide temperature range.
Potential applications include speed and
RPM (revolutions per minute) sensing in
tness equipment, magnetic encoder for
building access, damper or valve position
control in HVAC (heating, ventilation and
air conditioning) equipment, ow rate
sensing in appliances and industrial
processes, robotic control (cylinder position
monitoring), displacement sensor in
hospital beds, and medical equipment.
SS360NT/SS360ST/SS460S.
Features: Fastest response time in its
class • No chopper stabilization • High
sensitivity • Bipolar latching magnetics
• Sub-miniature, SOT-23 surface mount
package (SS360NT/SS360ST) supplied on
tape and reel • Small, leaded, at TO-92-
style package (SS460S) • Wide operating
voltage range of 3 Vdc to 24 Vdc • Built-in
reverse voltage • Durable design
• RoHS-compliant material meets Directive
2002/95
Benets: Fastest response time in its class
provides more efficiency in commutating
brushless dc motors. No chopper
stabilization results in a clean output signal.
Operates from only 30 Gauss typical, at
25°C [77 °F] and 55 Gauss maximum over
the full -40 °C to 150 °C [-40 °F to 302 °F]
temperature range, allowing for the use of
smaller, magnets or a wider air gap. Bipolar
latching magnetics make these products
well-suited for accurate speed sensing and
RPM measurement; the SS360NT is turned
ON by a North pole while the SS360ST
and SS460S are turned ON by a South
pole. Small size allows for compact design
with automated component placement, as
well as compact PC board layout. Wide
operating voltage range allows for potential
use in a wide range of applications. Built-in
reverse voltage enhances the protection
of the sensor and the circuits. Durable
design allows operation up to 150 °C
[302 °F]. Potential applications include
industrial/commercial brushless dc motor
commutation, flow rate sensing and motor
and fan control; transportation speed and
RPM sensing, tachometer, counter pickup
and convertible roof position; medical
equipment using electric motors.
10 www.honeywell.com/sensing
SS361CT/SS461C.
Features: Enhanced sensitivity • Bipolar
latching magnetics • Subminiature
package size with tape and reel
packaging (SS361CT) • Small, at TO-
92-style package (SS461C) • Simple
activation from a North pole (SS361CT) or
a South pole (SS461C) • Built-in reverse
voltage capability
Benets: Enhanced sensitivity allows
operation from only 50 G typ. at 25°C
[77 °F], 80 G max. at 60 °C to 85 °C [140
°F to 185 °F], and 95 Gauss over the full
temperature range of -40 °C to 125 °C [-40
°F to 257 °F], allowing the use of smaller,
potentially lower-cost magnets or wider
air gaps. Wide operating voltage range
of 4 Vdc to 24 Vdc for use in wide range
of potential applications. Subminiature
package size (SS361CT) uses less space
on the PCB than standard Hall-effect
sensor packages such as TO-92 or SOT-
89, allowing for use in smaller assemblies.
Tape and reel packaging (SS361CT) allows
for automated component placement,
helping to reduce manufacturing costs.
Small, flat TO-92-style package (SS461C)
is also available. Built-in reverse voltage
capability enhances protection of sensor
and circuits with which it is used. Bipolar
latching magnetics respond to alternating
North and South poles, making these
products well-suited for accurate speed
sensing and RPM measurement. Potential
applications include tachometer, counter
pickup, motor and fan control, flow-rate
sensing for appliances, robotics control,
and medical equipment using electric
motors.
SS361RT/SS461R.
Features: Bipolar latching magnetics
• Enhanced sensitivity • Subminiature
package size (SS361RT) • Low voltage:
3 V operation • Built-in reverse polarity
protection • Robust design: will operate
up to 150 °C [302 °F] • Through-hole
and surface-mount (SOT-23 and SOT-89)
packages
Benets: Enhanced sensitivity often
allows for the use of less expensive
magnets. Small size requires less PC board
space, allowing it to be used in smaller
assemblies. 3 V capability allows for use in
low voltage applications, promoting energy
efficiency. Available on tape and reel for
most high volume applications. Potential
applications include speed and RPM
sensing, brushless dc motor commutation,
tachometer, counter pickup, motor and
fan control, electric window lift, convertible
roof position and automotive transmission
position detection, flow-rate sensing,
robotics control.
SS400/SS500 Series.
Features: Unipolar, bipolar latching
magnetics • Sinking output • Multiple
operate/release points available
• Temperature compensated magnetics
with negative slope • High output current
capability • Small through-hole and
surface-mount (SOT-89) packages • Tape
and reel available
Benets: Quad Hall element design
minimizes effects of mechanical or thermal
stress on output and provides stable
output. Negative compensation slope
optimized to match negative temperature
coefficient of lower cost magnets, providing
robust design over wide temperature
range. Band gap regulation provides
stable operation over supply voltage
range. Potential applications include
speed and RPM sensing, brushless dc
motor commutation, motor and fan control,
magnetic encoding, disc speed, tape
rotation, flow-rate sensing, lid and door
closing detection, and position sensing.
SS41/SS51T Series.
Features: Bipolar magnetics • Sinking
output • High output current capability
• Reverse polarity protection
Benets: Built-in regulator provides
enhanced operational stability over supply
voltage range. Open-collector digital
sinking output voltage easily interfaces with
wide variety of electronic circuits. Internal
circuitry prevents sensor damage in case
supply voltage polarity is accidentally
reversed. Potential applications include
brushless dc motor commutation, motor
and fan control, magnetic encoding, and
tape rotation sensing.
SS421 Series.
Features: Bipolar magnetics • Sinking
output • Active high and active low
versions • Adjustable speed trip point with
external resistor and capacitor
• Temperature compensated
Benets: Internal circuitry contains
timer so that one or two pulses at slower
repetition rate than set point do not
produce unwanted output. Small amount
of hysteresis built into output provides
operation right at set point and does
not result in chattering output. User-
provided external resistor and capacitor
combination selects speed trip point
for particular application. Temperature
compensated for consistent operation with
low-cost magnets. Built-in timing circuit
designed to simplify and reduce cost of
PC board design. Potential applications
include monitor fan or motor performance.
SS42R.
Features: Hall effect • Bipolar latching
magnetics • Sinking or sourcing outputs
• High output current capability • Reverse
polarity protection
Benets: Hall-effect integrated circuit with
pair of complementary push/pull outputs.
Dual Hall-effect element offsets stress-
induced noise and drift. Operate and
release points laser trimmed to improve
symmetry around zero. Internal circuitry
prevents sensor damage if supply voltage
polarity is accidentally reversed. Potential
applications include conveyors, motor
control, ignitions, power sensing, linear or
rotary motion detection, and RPM sensing.
SS46.
Features: Bipolar latching magnetics
• Sinking (open collector) output
• Negative compensation slope • High
output current capability • High speed
capability • Reverse polarity protection
Benets: Internal circuitry prevents sensor
damage in case supply voltage polarity
is accidentally reversed. Open-collector
sinking output voltage easily interfaces
with wide variety of electronic circuits.
Potential applications include speed
and RPM sensing, brushless dc motor
commutation, motor and fan control,
magnetic encoding, disc speed, tape
rotation, and flow-rate sensing.
www.honeywell.com/sensing 11
VF526DT.
Features: Frequency signal for speed
output and logic level signal for direction
output • Temperature-compensated
magnetics and ultra-low offset drift • Wide
operating voltage range • Miniature, SOT-
89B plastic package • Tape and reel
Benets: Two separate, built-in Hall
sensors and associated logic circuitry
provide a frequency signal for speed
output and a logic level (high or low)
signal for direction output, potentially
replacing multiple sensors and electronic
components. Temperature-compensated
magnetics and ultra-low offset drift with
temperature provide a stable output over
a full temperature range of -40 °C to125 °C
[-40 °F to 257 °F]. Wide operating
voltage range of 3.4 Vdc to 24 Vdc
increases application flexibility. Tested
to moisture sensitivity similar to JEDEC
J-STD-020B, MSL Level 1, allowing use
in environments where humidity may be
a problem. Miniature plastic package
supplied on tape and reel for automated
assembly, allowing potential savings in
PC board space and labor cost. Potential
applications include anti-pinch electric
motor control systems for power window
and seats, magnetic encoding for
electronic steering systems, motion control
systems for pulleys and belts, garage
door openers and sliding doors and
position and velocity detection in industrial
equipment.
HALL-EFFECT SENSOR ICS -
LINEAR
91SS Series.
Features: Linear magnetics • Ratriometric
sourcing output • Standard mounting
centers • Linearity is ±1.5% max. • Two
package styles
Benets: Hall-effect integrated circuit
chip provides enhanced temperature
stability and performance. Laser-trimmed,
thick film resistors on ceramic substrate
and thin film resistors on integrated
circuit reduce null and gain shifts over
temperature, resulting in consistent
sensitivity between devices. Potential
applications include robotics control,
current sensing, linear or rotary motion
detection, and length measurement.
SS490/SS491B Series.
Features: Linear magnetics • Ratiometric
sourcing output • Positive temperature
coefcient • Different package styles
Benets: Quad Hall elements design
minimizes effects of mechanical or
thermal stress on output and provides
stable output. Laser-trimmed thin lm
resistors provide enhanced accuracy and
temperature compensation to reduce null
and gain shift over temperature. Positive
temperature coefficient helps compensate
for negative temperature coefficients of
low cost magnets, providing robust design
over wide temperature range. Rail-to-rail
operation provides more useable signal for
enhanced resolution. Potential applications
include current sensing, motor control,
position sensing, magnetic code reading,
rotary encoding, liquid level sensing,
vibration, and weight sensing applications.
SS39ET/SS49E/SS59ET Series.
Features: Linear magnetics • Ratiometric
sourcing output • Low-voltage operation
• Small, through-hole and surface-mount
packages • Available on tape and reel
Benets: Thin film resistors provide
enhanced temperature stability and
accuracy. Low voltage operation for
energy efciency. Potential applications
include current sensing, motor control,
position sensing, magnetic code reading,
ferrous metal detection, vibration, and
liquid level sensing.
SS94 Series.
Features: Linear magnetics • Ratiometric
sourcing output • Standard mounting
centers • Linearity is ±0.5% max. • Two
package styles
Benets: Hall-effect integrated circuit
chip provides enhanced temperature
stability and performance. Laser-trimmed,
thick film resistors on ceramic substrate
and thin film resistors on integrated
circuit reduce null and gain shifts over
temperature, resulting in consistent
sensitivity between devices. Includes
low drift, high sensitivity, noise shielded,
and general purpose listings. Potential
applications include robotics control,
current sensing, linear or rotary motion
detection, and length measurement.
MAGNETORESISTIVE SENSOR ICS
2SS552M Series.
Features: Omnipolar magnetics • Sinking
output • Low gauss operation (25 G max.)
• Operating speed of 0 kHz to over
100 kHz • Small, through-hole package •
Tape and reel available
Benets: Low gauss operation (25 G
max.) extends sensing distance to one
inch or more, depending on size. Potential
polarity independent applications include
presence/absence detection, lid sensor
for laptop computers, position sensing for
material handling equipment, and cylinder
position sensing in pneumatic cylinders.
SS552MT.
Features: Magnetorestive • Omnipolar
magnetics • Sinking output • Low gauss
operation (25 G max.) • Operating speed
of 0 kHz to over 100 kHz • Small, surface
mount package • Tape and reel
Benets: Low gauss operation (25
G max.) extends sensing distance to
one inch or more, depending on size.
Small, surface-mount package allows
automated, lower-cost assembly. Potential
polarity independent applications include
presence/absence detection, lid sensor
for laptop computers, position sensing for
material handling equipment, and cylinder
position sensing in pneumatic cylinders.
VF401.
Features: 2-wire digital current output
• Wide speed capability • One pulse per
pole pair output and differential bridge
operation • Output pattern independent of
gap between target and sensor
• Improved insensitivity to run-out, tilt and
twist • Enhanced sensitivity • Reverse
polarity protection • Miniature, TO-92-style
plastic package
Benets: High performance, digital,
2-wire, magnetoresistive sensor in
a miniature, flat, TO-92-style plastic
package with a current output designed
for sensing fine pitch ring magnets. Wide
speed capability provides application
flexibility with true zero speed sensing
and operation up to 3000 Hz. One pulse
per pole pair output and differential
12 www.honeywell.com/sensing
bridge operation allow compatibility with
differential Hall sensors, making it easier to
upgrade existing applications. Enhanced
sensitivity, ±7 Gauss typical allows for
larger air gaps (up to 2,5 mm [0.098 in])
and higher pole density (up to 50-pole
pairs depending on ring diameter).
Patented bridge array optimized to allow a
greater air gap between the target and the
sensor with reduced loss in sensor signal
or accuracy. Potential applications include
wheel speed sensing and shaft speed
encoding using a multipole ring magnet
in a wide variety of off road transportation,
industrial and medical equipment.
APS00B.
Features: Dual bridges with outputs 45°
out of phase • Wide, angular range • Low
resolution capability • Absolute sensing
• Typical 0 MHz to 5 MHz frequency
response • Low power requirements
• Small, surface mount package (SO-8)
• Tape and reel
Benets: Wide, angular range allows
measurements of ±90° without additional
components; measurements of ±180° are
possible with external components. Dual
Wheatstone bridges provide passive,
low-noise design, enhancing system
performance. Outputs 45° out of phase
may be used as speed and direction
signals. Resolution capability of less than
0.05° enhances overall system accuracy.
Absolute sensing means no indexing is
required and the exact target position
is known, simplifying system design.
Typical 0 MHz to 5 MHz frequency
response with 190 G minimum magnetic
field applied makes this saturated mode
sensor suitable for potential high speed
applications. Measures only field direction
and is virtually unaffected by shock,
vibration and magnetic-source gap
variations for stable and reliable output.
Small, surface-mount package saves room
on PC board when compared to larger
IC packages and components. Tape and
reel configuration (two sizes available)
allows use with automated pick-and-place
equipment, potentially reducing assembly
costs. Honeywell APS00A instrumentation
amplifier available separately for
additional signal processing. Potential
applications include high-accuracy
angular position, speed and angle, and
displacement sensing in a wide variety
of off road transportation, medical and
industrial equipment.
VALUE-ADDED HALL-EFFECT
SENSORS
103SR Series (Digital).
Features: Unipolar, bipolar, bipolar
latching magnetics • Sinking or sourcing
output • Aluminum housing • Color-coded,
jacketed cable • Adjustable mounting
Benets: Rugged, threaded aluminum
housing. Choice of cable materials
provides application exibility. Potential
applications include position and RPM
sensing in non-corrosive applications.
103SR Series (Linear).
Features: Linear magnetics • Ratiometric
sinking/sourcing output • Aluminum
housing • Color-coded, jacketed cable
• Adjustable mounting
Benets: Rugged, threaded aluminum
housing. Choice of cable materials provides
application exibility. Potential applications
include position and RPM sensing in non-
corrosive applications.
1GT Series.
Features: Sinking output • Fast operating
speed • Reverse polarity and transient
protection • EMI resistant • Wide
continuous operating temperature range
Benets: Magnetically-biased, Hall-effect
integrated circuit accurately senses
movement of ferrous metal targets. Sealed
in probe-style package for physical
protection and cost-effective installation.
Internal circuitry prevents sensor
damage in case supply voltage polarity
is accidentally reversed. Enhanced low
speed performance, output amplitude not
dependent on RPM. Sensor electronically
self-adjusts to slight variations in runout
and temperature, simplifying installation
and maintenance. Potential applications
include camshaft and crankshaft speed
and position, transmission speed, and
tachometer, as well as anti-skid and
traction control.
SR16/SR17 Series.
Features: Sinking output • Non-contact
position sensing • Compact, robust
packages • Environmentally sealed
package • Three terminations available
Benets: Internal magnet and Hall-
effect sensor mounted in dual tower or
side mount configuration for application
flexibility. Mechanically interchangeable
with standard optical sensors. Medium
level magnetic switching reduces stray field
interference. No mechanical contacts often
eliminates product wear. Environmentally
sealed plastic package provides enhanced
accuracy and repeatability in environments
in which dirt, dust, or stray IR light might
affect performance of optical solutions.
Potential applications include position and
speed sensing in fitness and information
technology, as well as in moderate electrical,
chemical, and mechanical environments.
SR3 Series.
Features: Unipolar, bipolar magnetics
• Sinking output • Frequencies exceeding
100 kHz
Benets: Plastic housing for position
and RPM sensing in potential corrosive
applications such as food and beverage,
chemical plants, and refineries.
SR4 Series.
Features: Magnetoresistive • Omnipolar
magnetics • Sinking output
Benets: Magnetoresistive technology
allows longer sensing distance at lower
gauss than Hall effect. Plastic housing
for position and RPM sensing in potential
corrosive applications such as food and
beverage, chemical plants, and refineries.
SPEED AND DIRECTION SENSORS
1GT Series.
Features: Enhanced operating speed
• Reverse polarity and transient protection
• EMI resistant • Wide continuous
operating temperature range • Probe-
style package • Enhanced low speed
performance • Output amplitude not
dependent on RPM
Benets: Sealed in probe-style package
for physical protection and cost-effective
www.honeywell.com/sensing 13
installation. Sensor electronically self-
adjusts to slight variations in runout and
temperature, simplifying installation and
maintenance. Circuit senses movement
of targets in potential applications such
as camshaft and crankshaft speed
and position, transmission speed, and
tachometer, as well as anti-skid and
traction control.
LCZ Series.
Features: Stainless steel package • Low
cost • Omni-directional sensor to target
orientation • Low power consumption
• Small size • Zero speed • Digital output
• Durable, cost-effective sensing solution
• Screw-in package style
Benets: Available in several diameters
and lengths for application flexibility.
Stainless steel package simple to install/
adjust and does not require rotational
orientation. Potential applications include
harsh environment rotary applications
such as pumps, rollers, mixers, fan speed
measurement, transmission, spindles,
gear reducer RPM, synchronization,
compressor speed, and dyno testing,
as well as industrial process control and
factory automation.
SNDH-T Series.
Features: Advanced performance
dynamic offset self calibration • Short
circuit and reverse voltage protection
• Air gap up to 2 mm [0.08 in] • Low jitter
output • Near-zero speed • EMI hardened
• High frequency switching capability
• Multiple connector options includes wire
harness and integral connector versions
using AMP super seal or AMP Jr.
• Probe-style package • Integrated circuit
packaging provides output phase shift
tolerancing with enhanced accuracy
Benets: Provides speed and direction
information using quadrature output with
signals 90 degree phase shifted from each
other. BiCMOS Hall-effect technology,
using advanced digital signal processing
for dynamic off-set cancellation, provides
enhanced air gap performance and phase
shift accuracy over most conditions.
Package design includes O-ring seal for
potential pressure applications and a
fixed mounting flange. Robust, automotive
under-the-hood grade packaging for most
environmental conditions as well as EMI
hardened. Used in potential applications
where high resolution is required at wide
frequency ranges and large air gaps.
SNDH-H Series.
Features: Hall-effect magnetic sensing
technology • Digital current sinking output
(open collector) • Advanced performance
dynamic offset self-calibration • Air gap
up to 2,5 mm [0.098 in] • Zero speed
versions • High frequency switching
capability (0 Hz to 15 kHz) • -40 ºC
to 150 ºC [-40 °F to 302 °F] operating
temperature capability • Multiple
connector options • O-ring seal
Benets: Use a magnetically biased
Hall-effect integrated circuit to accurately
sense movement of ferrous metal targets.
The specially designed IC (integrated
circuit) and a permanent magnet are
sealed in rugged, probe-type packages.
The flux density of the permanent magnet
alters when approached by ferrous metal
and is detected by the Hall ICs. If the
sensor is positioned at the circumference
of a revolving gear wheel, for example,
it detects the teeth and tooth spaces,
supplying a digital pulse output with
frequency proportional to gear wheel
speed. Potential applications include
tachometers/counters, speed of gears and
shafts in transmissions, hydraulic motors,
pumps, and gear boxes ow meters/
turbines, and engine RPM.
ZH10.
Features: Aluminum package • Low
cost • Omni-directional sensor to target
orientation • Low power consumption
• Small size • Zero speed • Digital output
• Durable, cost-effective sensing solution
• Screw-in package style
Benets: Aluminum package simple
to install/adjust and does not require
rotational orientation. Potential
applications include harsh environment
rotary applications such as pumps,
rollers, mixers, fan speed measurement,
transmission, spindles, gear reducer RPM,
synchronization, compressor speed, and
dyno testing, as well as industrial process
control and factory automation.
GTN Series.
Features: Choice of barrel lengths
• Integrated electronic diagnostics
• Enhanced operating speed • EMI
resistant • Reverse polarity and transient
protection • Wide continuous operating
temperature range • Probe-style package
• Enhanced low speed performance
• Output amplitude not dependent on RPM
Benets: Sealed in probe-style package
for physical protection and cost-effective
installation. Sensor electronically self-
adjusts to slight variations in runout and
temperature, simplifying installation
and maintenance. Integrated electronic
diagnostics detect open or short circuits
in power supply line by monitoring sensor
output. Circuit senses movement of ferrous
metal targets in potential applications
such as camshaft and crankshaft speed
and position, transmission speed, and
tachometer, as well as traction control.
SNDJ Series.
Features: Three housing styles • Three
different outputs • Direct sensing of
ferrous metal target • Zero speed sensing
capabilities (some listings) • Stainless
steel housing • Probe and screw-in
package styles • Rotational orientation
independent of sensor function
Benets: Used with ferromagnetic
gears or pole wheel to generate impulse
frequencies proportional to target speed.
Rugged stainless steel housing for
potential applications found in high speed
gear tooth sensing, over-speed detection,
and rotary gear or shaft position detection.
VARIABLE RELUCTANCE SPEED
SENSORS
VRS General Purpose Series,
VRS Hazardous Location Series,
VRS High Output Series, VRS
High Resolution Series, VRS High
Temperature Series, VRS Power
Output Series.
Features: Self-powered operation
• Simple installation • No moving parts
• Operates over wide speed range
• Adaptable to wide variety of
congurations • Customized versions
for potential unique speed sensing
applications
14 www.honeywell.com/sensing
Benets: All: Direct conversion of
actuator speed to output frequency. VRS
General Purpose Series, VRS Hazardous
Location Series: Simple, rugged devices
do not require external voltage source
for operation. VRS High Output Series:
Performs best at low to medium speeds
with medium to high impedance loads.
Sealed front-end versions available for
use where sensor is exposed to fluids,
lubricants, or adverse environmental
conditions. VRS High Resolution Series:
Proper sensor alignment is required. VRS
High Temperature Series: Sealed front-end
versions for potential applications where
sensor is exposed to fluids, lubricants, or
adverse environmental conditions.
Potential applications: VRS General
Purpose Series: Engine and motor RPM,
process, flow, wheel-slip, and gear speed
measurement with medium to high speeds
or in electrically noisy environments with
relatively small air gaps. VRS Hazardous
Location Series: Engine and motor RPM,
process, flow, wheel-slip, and gear speed
measurement where explosion-proof or
intrinsically safe sensors are required.
VRS High Output Series: Engine and
motor RPM, process, ow, wheel-slip, and
gear speed measurement where higher
output voltages are needed. VRS High
Resolution Series: Engine and motor RPM,
process, flow, wheel-slip, and gear speed
measurement where precise timing pulse is
required, and/or ne pitch gears are used.
VRS High Temperature Series: Engine and
motor RPM, process, ow, wheel-slip, and
gear speed measurement where sensor is
exposed to temperatures up to 260 °C
[450 °F]. VRS Power Output Series: Driving
low resistance loads at large air gaps in
engine and motor RPM, process, ow,
wheel-slip, and gear speed measurement
where larger actuators may be used.
Sensing and Control
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422 USA
www.honeywell.com/sensing
005894-14-EN IL50 GLO
October 2012
Copyright © 2012 Honeywell International Inc. All rights reserved.
Warranty. Honeywell warrants goods of
its manufacture as being free of defective
materials and faulty workmanship.
Honeywell’s standard product warranty
applies unless agreed to otherwise by
Honeywell in writing; please refer to your
order acknowledgement or consult your
local sales office for specific warranty
details. If warranted goods are returned to
Honeywell during the period of coverage,
Honeywell will repair or replace, at its
option, without charge those items it finds
defective. The foregoing is buyer’s sole
remedy and is in lieu of all warranties,
expressed or implied, including those
of merchantability and tness for a
particular purpose. In no event shall
Honeywell be liable for consequential,
special, or indirect damages.
While we provide application assistance
personally, through our literature and
the Honeywell web site, it is up to the
customer to determine the suitability of the
product in the application.
Specifications may change without notice.
The information we supply is believed to
be accurate and reliable as of this printing.
However, we assume no responsibility for
its use.
For more information about Sensing and
Control products, visit www.honeywell.
com/sensing or call +1-815-235-6847
Email inquiries to info.sc@honeywell.com