Hazardous Location
Industrial VRS Magnetic
Speed Sensors
DESCRIPTION
Hazardous Location VRS sensors are designed for use in
locations where explosion-proof or intrinsically safe sensors
are required.
Passive VRS (Variable Reluctance Speed) Magnetic Speed
sensors are simple, rugged devices that do not require an
external voltage source for operation.
A permanent magnet in the sensor establishes a fixed
magnetic field. The approach and passing of a ferrous metal
target near the sensor’s pole piece (sensing area) changes the
flux of the magnetic field, dynamically changing its strength.
This change in magnetic field strength induces a current into a
coil winding which is attached to the output terminals.
The output signal of a VRS sensor is an ac voltage that varies
in amplitude and wave frequency as the speed of the
monitored device changes, and is usually expressed in peak to
peak voltage (Vp-p).
One complete waveform (cycle) occurs as each target passes
the sensor’s pole piece. If a standard gear were used as a
target, this output signal would resemble a sine wave if viewed
on an oscilloscope.
Honeywell also offers VRS sensors for general purpose, high
output, power output, high resolution and high temperature, as
well as low-cost molded versions.
FEATURES
Self-powered operation
Direct conversion of actuator speed to output frequency
Simple installation
No moving parts
Designed for use over a wide range of speeds
Adaptable to a wide variety of configurations
Customized VRS products for unique speed sensing
applications
Housing diameters: 3/4 in, 5/8 in
Housing material/style: stainless steel threaded
Terminations: MS3106 connector, preleaded
Output voltages: 30 Vp-p to 60 Vp-p
POTENTIAL APPLICATIONS
Engine RPM (revolutions per minute) measurement on
aircraft, automobiles, boats, buses, trucks and rail
vehicles
Motor RPM on oil and gas drilling equipment and
machinery
Motor RPM measurement on drills, grinders, lathes and
automatic screw machines
Process speed measurement on food, textile, paper,
woodworking, printing, tobacco and pharmaceutical
industry machinery
Motor speed measurement of electrical generating
equipment in grain elevators, sawmills and other
potentially explosive environments
Speed measurement of pumps, blowers, mixers, exhaust
Gear speed measurement
Hazardous Location
2 www.honeywell.com/sensing
3/4 INCH EXPLOSION-PROOF SENSORS (All dimensions for reference only. mm/[in])
When properly installed using the explosion containment method, all 3070X and catalog listings on this page are certified for use in
hazardous locations as follows: Class I, Groups A, B, C, D; Class II Groups E, F, G; Class III.
These catalog listings have been tested to and meet the requirements of applicable U.S. and Canadian specifications for the
locations described above.
General Specifications
Test Condition Specifications
Characteristic
Parameter
Characteristic
Parameter
Characteristic
60 Vp-p
Inductance
115 mH max.
Surface speed
25 m/s
[1000 in/s]
191 Ohm to 280 Ohm
Gear pitch range
12 DP (module 2.11)
or coarser
Gear
8 DP
(module 3.17)
4,75 mm [0.187 in]
Optimum actuator
8 DP (module 3.17)
ferrous metal gear
Air gap
0,127 mm
[0.005 in]
0,38 m/s [15 in/s] typ.
Max. operating
frequency
40 kHz typ.
Load
resistance
100 kOhm
-73 ºC to 93 ºC
[-100 ºF to 200 ºF]
Vibration
Mil-Std 202F
Method 204D
3/4-20 UNEF-2A
Termination
18 AWG PVC-Insulated
Leads
Catalog
Listing
Thread
Length (A)
Weight
24,05
[1.00] 3000 MIN
[120.00]
31,75
[1.250]
A
BLIND END SHELL
POLE PIECE
1/2-14 NPT
3070A
3070A35
45 mm [1.8 in]
88 mm [3.5 in]
294 g [10.5 oz]
322 g [11.5 oz]
Industrial VRS Magnetic Speed Sensors
Honeywell Sensing and Control 3
5/8 INCH EXPLOSION-PROOF SENSORS (All dimensions for reference only. mm/[in])
When properly installed using the explosion containment method, the 3090X catalog listings on this page are certified for use in
hazardous locations as follows: Class I, Groups A, B, C, D; Class II Groups E, F, G; Class III.
These catalog listings have been tested to and meet the requirements of applicable U.S. and Canadian specifications for the
locations described above.
The catalog listings on this page conform to standards: II 3 G EEx nA II T6.
General Specifications
Test Condition Specifications
Characteristic
Parameter
Characteristic
Parameter
Characteristic
60 Vp-p
Inductance
115 mH max.
Surface speed
25 m/s
[1000 in/s]
191 Ohm to 280 Ohm
Gear pitch range
12 DP (module 2.11)
or coarser
Gear
8 DP
(module 3.17)
4,75 mm [0.187 in]
Optimum actuator
8 DP (module 3.17)
ferrous metal gear
Air gap
0,127 mm
[0.005 in]
0,38 m/s [15 in/s] typ.
Maximum
operating
frequency
40 kHz typ.
Load
resistance
100 kOhm
-73 ºC to 93 ºC
[-100 ºF to 200 ºF]
Vibration
Mil-Std 202F
Method 204D
5/8-20 UNF-2A
Termination
18 AWG PVC-insulated
leads
Catalog
Listing
Thread
Length (A)
Weight
24,5
[1.00] 3000 MIN
[120.00]
31,75
[1.250]
A
BLIND END SHELL
POLE PIECE
1/2-14 NPT
3090A
3090A35
45 mm [1.8 in]
88 mm [3.5 in]
280 g [9.0 oz]
366 g [10.0 oz]
Hazardous Location
4 www.honeywell.com/sensing
5/8 INCH (M16*) INTRINSICALLY SAFE VRS SENSORS (All dimensions for reference only. mm/[in])
*Contact Honeywell for availability of metric mounting thread versions.
When properly installed using the intrinsic safety protection method connected per the control drawings on pages 6 and 7, catalog
listings 3042A is intrinsically safe for hazardous locations as follows:
Class I, Groups A, B, C, D.
This product has been tested to and meets the requirements of applicable U.S. and Canadian specifications for the locations
described above.
General Specifications
Test Condition Specifications
Characteristic
Parameter
Characteristic
Parameter
Characteristic
30 Vp-p
Inductance
26 mH max.
Surface speed
25 m/s
[1000 in/s]
150 Ohm
Gear pitch range
16 DP (module 1.58)
or coarser
Gear
8 DP
(module 3.17)
3,9 mm [0.156 in]
Optimum actuator
12 DP (module 3.17)
ferrous metal gear
Air gap
0,127 mm
[0.005 in]
0,38 m/s [15 in/s] typ.
Max. operating
frequency
40 kHz typ.
Load
resistance
100 kOhm
-55 ºC to 120 ºC
[-67 ºF to 250 ºF]
Vibration
N/A
5/8-18 UNF-2A
Termination
MS3106 connector
Catalog
Listing
Weight
Ø18,29
[0.720]
0,76
[0.030]
28,12
[1.107]
BA
8,0
[0.312]
Ø13,84
[0.545] +-
36.5
[1.437]
19,05
[0.750]
3042A
70 g [2.5 oz]
‘
Industrial VRS Magnetic Speed Sensors
Honeywell Sensing and Control 5
5/8 INCH (M16*) INTRINSICALLY SAFE VRS SENSORS (All dimensions for reference only. mm/[in])
*Contact Honeywell for availability of metric mounting thread versions.
When properly installed using the intrinsic safety protection method connected per the control drawings on pages 6 and 7, catalog
listing 3042H20 is intrinsically safe for hazardous locations as follows:
Class I, Groups A, B, C, D; Class II Groups E, F, G; Class III.
This product has been tested to and meets the requirements of applicable U.S. and Canadian specifications for the locations
described above.
General Specifications
Test Condition Specifications
Characteristic
Parameter
Characteristic
Parameter
Characteristic
30 Vp-p
Inductance
26 mH max.
Surface speed
25 m/s
[1000 in/s]
150 Ohm
Gear pitch range
16 DP (module 1.58)
or coarser
Gear
8 DP
(module 3.17)
3,9 mm [0.156 in]
Optimum actuator
12 DP (module 3.17)
ferrous metal gear
Air gap
0,127 mm
[0.005 in]
0,38 m/s [15 in/s] typ.
Max. operating
frequency
40 kHz typ.
Load
resistance
100 kOhm
-55 ºC to 120 ºC
[-67 ºF to 250 ºF]
Vibration
N/A
5/8-18 UNF-2A
Termination
18 AWG PVC-insulated
leads
Catalog
Listing
Weight
25,4
[1.00] 3000 MIN
[120.00]
31,75
[1.250]
50
[2.0]
0,51
[0.020] 1/2-14 NPT
3042AH20
140 g [5.0 oz]
Hazardous Location
6 www.honeywell.com/sensing
CONTROL DRAWING FOR SINGLE CHANNEL BARRIERS
Hazardous Location Non-hazardous Location
Intrinsic Safety Barrier
Speed Sensor
HAZARDOUS LOCATIONS
Catalog listing 3042H20:
Class I, Groups A, B, C, D
Class II, Groups E, F, G
Class III
Catalog listing 3042A:
Class I, Groups A, B, C, D
ENTITY PARAMETERS
Vmax = 24 V, Imax = 35 mA, Li = 26 mH, Ci = 0 μF
Any barrier (see General Notes) with entity parameters
connected in accordance with barrier manufacturers
instructions of:
Vmax > Voc Ca > Ci + cable capacitance
Imax > Isc La > Li + cable inductance
SYSTEM PARAMETERS
Any barrier (see General Notes) having one of the following
specified parameters:
Vmax
Rmin
Vmax
Rmin
Vmax
Rmin
30
707
20
421
10
136
25
580
15
278
5
1
GENERAL NOTES
1. For jurisdictions requiring certification to the applicable
Canadian standards, the barrier must be CSA Certified
and the system must be installed in accordance with the
Canadian Electrical Code Part 1.
2. For jurisdictions requiring certification to the applicable
Occupational Safety and Health Administration (OSHA)
standards, the barrier must be CSA NRTL or equivalent
and the system must be installed in accordance with the
National Electrical Code (NEC), article 504 or
ANSI/NFPA 70.
SENSOR GROUNDING
Catalog listing 3042A: Sensor housing must be connected to
intrinsically safe system ground during installation.
Catalog listing 3042H20: Green wire must be connected to
intrinsically safe system ground.
Exia = Intrinsically Safe, Sécurité Intrinsèque
Industrial VRS Magnetic Speed Sensors
Honeywell Sensing and Control 7
CONTROL DRAWING FOR DUAL CHANNEL BARRIERS
Hazardous Location Non-hazardous Location
Intrinsic Safety Barrier
Speed Sensor
Ground
.
HAZARDOUS LOCATIONS
Catalog listing 3042H20:
Class I, Groups A, B, C, D
Class II, Groups E, F, G
Class III
Catalog listing 3042A:
Class I, Groups A, B, C, D
ENTITY PARAMETERS
Vmax = 24 V, Imax = 35 mA, Li = 26 mH, Ci = 0 μF
Any barrier (see General Notes) with entity parameters
connected in accordance with barrier manufacturers
instructions of:
Vmax > Voc Ca > Ci + cable capacitance
Imax > Isc La > Li + cable inductance
SYSTEM PARAMETERS
Any barrier (see General Notes) having one of the following
specified parameters:
Vmax
Rmin
Vmax
Rmin
Vmax
Rmin
30
1414
20
842
10
272
25
1160
15
556
5
2
GENERAL NOTES
1. For jurisdictions requiring certification to the applicable
Canadian standards, the barrier must be CSA Certified
and the system must be installed in accordance with the
Canadian Electrical Code Part 1.
2. For jurisdictions requiring Certification to the applicable
Occupational Safety and Health Administration (OSHA)
standards, the barrier must be CSA NRTL or equivalent
and the system must be installed in accordance with the
National Electrical Code (NEC), article 504 or
ANSI/NFPA 70.
SENSOR GROUNDING
Catalog listing 3042A: Sensor housing must be connected to
intrinsically safe system ground during installation.
Catalog listing 3042H20: Green wire must be connected to
intrinsically safe system ground.
Exia = Intrinsically Safe, Sécurité Intrinsèque
Sensing and Control
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
www.honeywell.com
005879-2-EN
March 2012
Copyright © 2012 Honeywell International Inc. All rights reserved.
WARNING
PERSONAL INJURY
DO NOT USE these products as safety or emergency stop
devices or in any other application where failure of the
product could result in personal injury.
Failure to comply with these instructions could result in
death or serious injury.
WARRANTY/REMEDY
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 other
warranties, expressed or implied, including those of
merchantability and fitness 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.
WARNING
MISUSE OF DOCUMENTATION
The information presented in this product sheet is for
reference only. Do not use this document as a product
installation guide.
Complete installation, operation, and maintenance
information is provided in the instructions supplied with
each product.
Failure to comply with these instructions could result in
death or serious injury.
SALES AND SERVICE
Honeywell serves its customers through a worldwide network
of sales offices, representatives and distributors. For
application assistance, current specifications, pricing or name
of the nearest Authorized Distributor, contact your local sales
office or:
E-mail: info.sc@honeywell.com
Internet: www.honeywell.com/sensing
Phone and Fax:
Asia Pacific +65 6355-2828
+65 6445-3033 Fax
Europe +44 (0) 1698 481481
+44 (0) 1698 481676 Fax
Latin America +1-305-805-8188
+1-305-883-8257 Fax
USA/Canada +1-800-537-6945
+1-815-235-6847
+1-815-235-6545 Fax