Honeywell HumidIcon™ Digital
Humidity/Temperature Sensors
HIH9000 Series
±1.7 %RH Accuracy | ±0.3 °C Temperature Accuracy
Datasheet
2sensing.honeywell.com
What makes our sensors better?
• One sensor does the work of two!
• ±1.7 %RH accuracy (humidity performance)
• ±0.3 °C accuracy (temperature performance)
• -40 °C to 125 °C [-40 °F to 257 °F] operating
temperature range
• ±1.0 %RH hysteresis
The series consists of packaging variations, offering customers the ability to
choose housing style (SIP 4-Pin or SOIC-8 SMD), filter (hydrophobic filter or
no filter), output (I2C or SPI), and packaging (tape and boxed, tape and reel, or
samples on tape).
Honeywell HumidIcon™
Digital Humidity/Temperature Sensors
Honeywell HumidIcon™ Digital Humidity/Temperature Sensors, HIH9000 Series, are digital output-type relative humidity (RH)
and temperature sensors combined in the same package. These sensors provide an accuracy level of ±1.7 %RH and a
temperature accuracy level of ±0.3 °C.
• Industry-leading long-term stability • True temperature-compensated digital I2C or SPI output
• Industry-leading reliability • Energy efficiency
• Lowest total cost solution • Ultra-small package size and options
• Other accuracies available: ±2.0 %RH (HIH8000 Series), ±3.0 %RH (HIH7000 Series), ±4.0 %RH (HIH6100 Series),
and ±4.5 %RH (HIH6000 Series)
HIH9120 HIH9121
HIH9130
HIH9131
Series* Output
type
Supply
voltage
Housing
style Filter Accuracy Output Packaging
HIH9120-021-xxxx
digital 2.3 Vdc to
5.5 Vdc
SIP 4-pin without filter,
non-condensing
±1.7 %RH
I2C100 to 249 units on tape
and boxed, 250 units or
more on tape and reel; or
5 sample pieces on tape
HIH9121-021-xxxx SIP 4-pin with filter,
condensation resistant I2C
HIH9130-021-xxxx SOIC-8 SMD without filter,
non-condensing I2C1000 pieces on tape and
reel; or 5 sample pieces
on tape
HIH9130-000-xxxx SOIC-8 SMD without filter,
non-condensing SPI
HIH9131-021-xxxx SOIC-8 SMD with filter,
condensation resistant I2C1000 pieces on tape and
reel; or 5 sample pieces
on tape
HIH9131-000-xxxx SOIC-8 SMD with filter,
condensation resistant SPI
* See order guide on page 11 for complete catalog listings.
HIH9000 Series Housing, Filter, Output, and Packaging Comparison
INDUSTRY-LEADING RELIABILITY • ACCURACY • PACKAGING • LONG-TERM STABILITY
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sensing.honeywell.com
±1.7
ACCURACY
%RH
Features
and Benefits
*Competitive Differentiator
INDUSTRY-LEADING LONG-TERM STABILITY*
(1.2 %RH OVER FIVE YEARS)
Competitive humidity sensors require a 12 hour at 75 %RH rehydration process
(which requires special equipment chambers) to correct reflow temperature
offset. Honeywell’s sensor also experiences an offset after reflow; however, it only
requires a five-hour rehydration under ambient conditions (>50 %RH).
Honeywell’s industry-leading long-term stability:
• Minimizes system performance issues.
• Helps support system uptime by eliminating the need
to service or replace the sensor during its application
life.
• Eliminates the need to regularly recalibrate the
sensor in the application, which can be inconvenient
and costly.
INDUSTRY-LEADING RELIABILITY
(MTTF 9,312,507 HR)*
Thermoset-polymer capacitive sensing element’s multilayer construction provides
resistance to most application hazards such as condensation, dust, dirt,
oils, and common environmental chemicals, which help provide industry-leading
reliability.
LOWEST TOTAL COST SOLUTION*
Honeywell’s HumidIcon HIH9000 Series delivers the lowest total cost solution due
to the sensor’s industry-leading combined humidity/temperature sensor.
COMBINED HUMIDITY AND TEMPERATURE SENSOR
Allows the RH measurement to be temperature compensated, and provides a
second, standalone temperature sensor output; allows the user to purchase one
sensor instead of two.
ENERGY EFFICIENT*
• Low supply voltage: Can operate down to 2.3 Vdc, which allows use in low
energy and wireless-compatible applications to enhance energy savings
and prolong system battery life.
• Low power consumption: The sensor goes into sleep mode when not
taking a measurement within the application, consuming only 1 µA of power
versus 650 µA in full operation in a battery operated system; sleep mode helps
maximize battery life, reduces power supply size, and reduces the application’s
overall weight.
Offers customers the lowest total cost solution.
One sensor does the work of two!
4sensing.honeywell.com
HIGH RESOLUTION
High 14-bit humidity sensor resolution and 14-bit temperature sensor resolution
within the application help the user’s system detect the smallest relative
humidity or temperature change.
TRUE, TEMPERATURE-COMPENSATED
DIGITAL I2C OR SPI OUTPUT*
Typically allows the customer to remove the components associated with signal
conditioning from the PCB to free up space and reduce costs associated with
those components (e.g., acquisition, inventory, assembly). True, temperature-
compensated digital I2C or SPI output often eliminates problems that could occur
from having multiple signal conditioning components across the PCB, as well as
simplifies integration to the microprocessor, eliminating the need for customer-
implemented, complex signal conditioning.
HOUSING STYLE
SOIC-8 SMD (Surface Mount Device) or SIP 4 Pin; ultra-small size allows for
flexibility of use within the application, occupies less space on the PCB, and
typically simplifies placement on crowded PCBs or in small devices; industry
standard design simplifies design-in.
FILTER
Available with hydrophobic filter and condensation-resistance, allowing for use in
many condensing environments, or without hydrophobic filter, non-condensing.
TAPE AND REEL
Allows for use in high volume, automated pick-and-place manufacturing,
eliminating lead misalignment to the PCB and helping the customer to reduce
manufacturing costs.
WIDE OPERATING TEMPERATURE RANGE
-40 °C to 125 °C [-40 °F to 257 °F] allows for use in many applications.
OPTIONAL ONE OR TWO %RH LEVEL ALARM OUTPUTS
Provides the ability to monitor whether the RH level has exceeded or fallen below
predetermined and critical levels within the application.
MULTI-FUNCTION ASIC
Delivers flexibility within the application by lowering or eliminating the risk and cost
of OEM calibration.
ROHS AND WEEE COMPLIANT, HALOGEN FREE
Free up PCB space. Reduce costs.
Choose options to best fit the application.
Features
and Benefits
*Competitive Differentiator
5
sensing.honeywell.com
INDUSTRIAL
HVAC/R
May be used to provide precise RH and temperature measurement in air
conditioning/air movement systems, enthalpy sensing, thermostats, humidifiers/
dehumidifiers, and humidistats to maintain occupant comfort and ideal storage
humidity/temperature while achieving low energy consumption, supporting system
accuracy and warranty requirements, maximizing system uptime, and improving
overall system quality.
AIR COMPRESSORS
May be used to provide precise RH measurement in compressed air lines, allowing
the system to remove any condensation; dry compressed air is critical for customer
process control measurement.
WEATHER STATIONS
May be used to provide precise RH and temperature measurement in ground-based
and airborne weather stations, allowing real time and highly accurate monitoring/
reporting of actual weather conditions.
TELECOM CABINETS
May be used to provide precise RH and temperature measurement in the telecom
cabinet HVAC system; maintaining proper temperature and humidity levels in the
cabinet provides maximum system uptime and performance.
INDUSTRIAL INCUBATORS/MICROENVIRONMENTS
May be used to provide optimal temperature and RH levels to support critical
processes and experiments, enhancing process efficiency with desired climate
conditions.
GRAIN DRYING SYSTEMS
May be used in cable-mounted grain drying management systems to measure
the moisture content and temperature level inside the grain silos to help the grains
remain dry.
MEDICAL
RESPIRATORY THERAPY
May be used to provide precise RH and temperature measurement in sleep
apnea machines and ventilators, enhancing patient comfort, safety and treatment
effectiveness with warm and humidified air.
INCUBATORS/MICROENVIRONMENTS
May be used to provide optimal temperature and RH levels to support critical
processes and experiments, enhancing process efficiency with desired climate
conditions.
Potential Applications
6sensing.honeywell.com
HIH9000 Series ±1.7 %RH Accuracy | ±0.3 °C Temperature Accuracy
Table 1. Environmental Specifications
Characteristic Condition Min. Typ. Max. Unit
Operating temperature range powered -40 [-40] – 125 [257] °C [°F]
Operating humidity range powered 0 – 100 %RH
Storage temperature range unpowered -40 [-40] – 125 [257] °C [°F]
Storage humidity range – 30 – 50 %RH
Soldering temperature:
manual
automated
4 s reflow peak
30 s reflow peak
–
–
–
–
350 [662]
260 [500]
°C [°F]
ESD MIL-STD 883H, Method 3015.7 – – ±4 kV
Latch-up immunity – – – ±100 mA
Shock
MIL-STD 202G, Method 213D, Test Condition C,
half-sine, 6 ms ±3 perpendicular axis, 3 shock
pulses per axis
– – 100 g
Vibration MIL-STD 202G, Method 204D, Test Condition D,
10 Hz to 2000 Hz – – 20 g
Light sensitivity exposed to 50 lumens yellow light; exhibited no change in output
Reliability (MTTF) 9,312,507 hr
Table 2. Humidity Performance Specifications
Characteristic Condition Min. Typ. Max. Unit
Supply voltage variation effect
on humidity 2.3 Vdc to 5.5 Vdc – 0.1 1.5 %RH/V
Compensated humidity range15 °C to 50 °C [41 °F to 122 °F] 10 – 90 %RH
Compensated temp. range1– 5 [41] – 50 [122] °C [°F]
Resolution 14 bit ADC resolution – – 0.04 %RH
Accuracy225 °C [77 °F] rising RH – ±1.7 – %RH
Maximal accuracy – – ±3.0 – %RH
Hysteresis – – ±1.0 – %RH
Long term stability 50 %RH, 25 °C [77 °F], 5 years – ±0.05 ±1.2 %RH
Response time t 63 % – – 8 s
Impact of soldering IPC/EIA/JEDEC J-STD-020D, peak temp.
of 260 °C [500 °F] – – ±2.5 %RH
Notes:
1 Conversion Formulas:
14 bit ADC output for humidity to %RH: 14 bit ADC output for temperature conversion to °C:
Humidity (%RH) = Humidity_14_bit_ADC_output x 100
214 – 2 Temperature (C°) = Temperature_14_bit_ADC_output x 165 – 40
214 – 2
2 Accuracy is specified at the typical supply voltage of 3.3 Vdc and at 25 °C [77 °F]. It is the maximum deviation from the ideal transfer function of
relative humidity measured over the compensated humidity range of 10 %RH to 90 %RH.
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Honeywell HumidIcon™ Digital Humidity/Temperature Sensors
Table 3. Temperature Performance Specifications
Characteristic Condition Min. Typ. Max. Unit
Supply voltage variation effect
on temperature 2.3 Vdc to 5.5 Vdc – 0.1 1.0 °C/V
Compensated temp. range – 5 [41] – 50 [122] °C [°F]
Resolution 14 bit ADC resolution – – 0.025 °C
Accuracy 5 °C to 50 °C [41 °F to 122 °F] – ±0.3 – °C
Long term stability 25 °C for 5 years – – ±0.05 °C/yr
Response time t 63 % – – 30 s
Impact of soldering IPC/EIA/JEDEC J-STD-020D, peak temp.
of 260 °C [500 °F] – – ±0.1 °C
Table 4. Current Consumption
Characteristic VDD Abbr. Condition Typ. Max. Unit
Sleep current 3.3 ISLEEP – 0.6 1 µA
Supply current:
I2C
SPI
3.3
3.3
IDD
IDD
14 bit fastest update, no sleep
14 bit fastest update, no sleep
0.65
0.75
1
1
mA
mA
Table 5. Input and Output Characteristics
Characteristic Abbr. Condition Min. Typ. Max. Unit
Supply voltage VDD – 2.3 3.3 5.5 Vdc
Low level output voltage VOL IOL = 2.8 mA min. – – 20 % VDD
High level output voltage VOH IOH = -2.8 mA min. 80 % – – VDD
Low level input voltage VIL – – – 20 % VDD
High level input voltage VIH – 80 % – – VDD
Pull-up resistor:
I2C
SPI (for SS only)
RP
RSS
–
–
–
–
2.2
10
–
–
kOhm
kOhm
Table 6. Measurement Timing
Characteristic Abbr. Condition Min. Typ. Max. Unit
Start-up time (power-on to
data ready) TSTA 14 bit TH and 14 bit humidity resolution – 50 60 ms
Update rate application dependent: measurements are taken only when the application requests them
8sensing.honeywell.com
HIH9000 Series ±1.7 %RH Accuracy | ±0.3 °C Temperature Accuracy
Figure 1. I2C Timing Diagram
SD
A
SCL
t
LOW
t
HDSTA
t
HDSTA
t
HIGH
t
HDDAT
t
SUSTA
t
SUSTO
t
BUS
t
SUDAT
Characteristic Abbr. Min. Typ. Max. Unit
SCL clock frequency FSCL 100 – 400 kHz
Start condition hold time relative to SCL edge tHDSTA 0.1 – – µs
Minimum SCL clock low width1 tLOW 0.6 – – µs
Minimum SCL clock high width1 tHIGH 0.6 – – µs
Start condition setup time relative to SCL edge tSUSTA 0.1 – – µs
Data hold time on SDA relative to SCL edge tHDDAT 0 – 0.5 µs
Data setup time on SDA relative to SCL edge tSUDAT 0.1 – – µs
Stop condition setup time on SCL tSUSTO 0.1 – – µs
Bus free time between stop and start condition tBUS 1 – – µs
Note:
1 Combined low and high widths must equal or exceed minimum SCL period.
Figure 2. SPI Timing Diagram
t
BUS
t
CLKD
SCLK
MISO
SS
t
HIGH
t
SUSS
HiZHiZ
t
HDSS
t
LOW
t
CLKD
Characteristic Abbr. Min. Typ. Max. Unit
SCLK clock frequency fSCL 50 – 800 kHz
SS drop to first clock edge tHDSS 2.5 – – μs
Minimum SCLK clock low width1tLOW 0.6 – – μs
Minimum SCLK clock high width1tHIGH 0.6 – – μs
Clock edge to data transition tCLKD 0 – 0.5 μs
Rise of SS relative to last clock edge tSUSS 0.1 – – μs
Bus free time between rise and fall of SS tBUS 2 – – µs
Note:
1 Combined low and high widths must equal or exceed minimum SCLK period.
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sensing.honeywell.com
Honeywell HumidIcon™ Digital Humidity/Temperature Sensors
Figure 3. SOIC-8 SMD Typical Application Circuits
I2C SPI
Digital Humidity/Temp.
Sensor
V
DD
V
CORE
V
SS
NC
SCL
SDA
AL_L
AL_H
V
SUPPLY
= 2.3 Vdc to 5.5 Vdc
GN
D
GND
12 V
0.1 µF
0.22 µF
2.2
kOhm
83
4
5
6
1
2
7
LED
2.2
kOhm
Digital Humidity/Temp.
Sensor
V
DD
V
CORE
V
SS
NC
SS
SCLK
MISO
AL_L
GN
D
0.1 µF
0.22 µF
10
kOhm
83
4
6
5
1
2
7
LED
V
SUPPLY
= 2.3 Vdc to 5.5 Vdc
Figure 4. SOIC-8 SMD Mounting Dimensions, PCB Landing Pattern and Pinout [For reference only: mm/[in].)
Mounting Landing Pattern
4,90
[0.193]
3,90
[0.1
53]
1,905
[0.075]
1,27
[0.050]
0.41
[0.016]
1234
8765
6,0
[0.236]
0,15
[0.006]
0,203
[0.0080]
2,055
[0.081]
8X 0,61
[0.024
]
8X 2,03
[0.08]
4X 4,9
[0.193
]
6X 1,27
[0.05]
Pinout for I2C Versions Pinout for SPI Versions
Pin ASIC Pad Description Pin ASIC Pad Description
1 VCORE connect via 0.1 µF to ground 1 VCORE connect via 0.1 µF to ground
2 VSS supply ground 2 VSS supply ground
3 SCL I2C clock 3 SS slave select (Input)
4 SDA I2C data 4 SCLK serial clock
51AL_H alarm output high 5 MISO master-in-slave-out
61AL_L alarm output low 61AL_L alarm output low
7 NC not connected externally 7 NC not connected externally
8 VDD supply voltage, connect via 0.22 µF to ground 8 VDD supply voltage, connect via 0.22 µF to ground
1 Do not connect Pin(s) 5 and/or 6 if the built-in alarm feature is not desired. 1 Do not connect Pin 6 if the built-in alarm feature is not desired.
Tape and Reel
4,00
[0.157]
1,50
[0.059]
1,75
[0.069] 0,29
[0.011 ]
13
[0.51]
330
[13,0]
17,4
[0.68]
102
[4.0]
8,00
[0.315]
12.00
[0.472]
5,50
[0.216]
2,58
[0.102]
10 sensing.honeywell.com
HIH9000 Series ±1.7 %RH Accuracy | ±0.3 °C Temperature Accuracy
Figure 5. SIP 4 Pin Typical Application Circuit
Digital Humidity/Temp.
Sensor
V
DD
V
SS
SCL
SDA
V
SUPPLY
= 2.3 Vdc to 5.5 Vdc
GND
0.22 µF
2.2
kOhm
13
42
2.2
kOhm
Figure 6. SIP 4 Pin Mounting Dimensions, PCB Landing Pattern and Pinout [For reference only: mm/[in].)
Mounting Landing Pattern
1234
8,9
[0.35]
1,20
[0.047]
PCB
1,2 - 2,0
[0.05 - 0.08]
4,90
[0.193]
3,90
[0.1
53]
5,0
[0.1
97]
1,27
[0.050]
0.41
[0.016]
0,063
[0.0025]
0,203
[0.0080]
1,905
[0.075]
1,27
[0.050]
1,05 DIA.
[0.040] 0,65 DIA.
[0.025]
Tape and Reel1
4,00
[0.157]
1,50
[0.059]
1,75
[0.069] 0,32
[0.013]
13
[0.51]
330
[13,0]
21,4
[0.84]
102
[4.0]
8,00
[0.315]
16,00
[0.630]
5,00
[0.197]
2,61
[0.103]
1 For orders of 250 to 1000 units
Pin ASIC Pad Description
1 VDD connect via 0.22 µF to ground
2 VSS supply ground
3 SCL I2C clock
4 SDA I2C data
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sensing.honeywell.com
Honeywell HumidIcon™ Digital Humidity/Temperature Sensors
Order Guide
Catalog Listing Description
HIH9120-021-0011Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, I2C, ±1.7 %RH accuracy,
SIP 4 Pin, without filter, non-condensing, 100 units on tape
HIH9120-021-001S Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, I2C, ±1.7 %RH accuracy,
SIP 4 Pin, without filter, non-condensing, five units on tape (sample)
HIH9121-021-0011Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, I2C, ±1.7 %RH accuracy,
SIP 4 Pin, with filter, condensation-resistant, 100 units on tape
HIH9121-021-001S Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, I2C, ±1.7 %RH accuracy,
SIP 4 Pin, with filter, condensation-resistant, five units on tape (sample)
HIH9130-000-001 Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, SPI, ±1.7 %RH accuracy,
SOIC-8 SMD, without filter, non-condensing, 1000 units on tape and reel
HIH9130-000-001S Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, SPI, ±1.7 %RH accuracy
SOIC-8 SMD, without filter, non-condensing, five units on tape (sample)
HIH9130-021-001 Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, I2C, ±1.7 %RH accuracy,
SOIC-8 SMD, without filter, non-condensing, 1000 units on tape and reel
HIH9130-021-001S Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, I2C, ±1.7 %RH accuracy,
SOIC-8 SMD, without filter, non-condensing, five units on tape (sample)
HIH9131-000-001 Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, SPI, ±1.7 %RH accuracy,
SOIC-8 SMD, with filter, condensation-resistant, 1000 units on tape and reel
HIH9131-000-001S Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, SPI, ±1.7 %RH accuracy,
SOIC-8 SMD, with filter, condensation-resistant, five units on tape (sample)
HIH9131-021-001 Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, I2C, ±1.7 %RH accuracy,
SOIC-8 SMD, with filter, condensation-resistant, 1000 units on tape and reel
HIH9131-021-001S Honeywell HumidIcon™ Digital Humidity/Temperature Sensors: HIH9000 Series, I2C, ±1.7 %RH accuracy,
SOIC-8 SMD, with filter, condensation-resistant, five units on tape (sample)
1 Orders of 250 units or more are packaged on tape and reel.
12 sensing.honeywell.com
HIH9000 Series ±1.7 %RH Accuracy | ±0.3 °C Temperature Accuracy
NOTICE:
SENSOR REHYDRATION
• Exposure to elevated temperatures, such as those
experienced during solder reflow, may dry out the sensing
element. It is recommended that the sensor be allowed time
to rehydrate after soldering or other high temperature/dry
exposures.
• Exposure to these conditions will not permanently damage the
sensor. It will generally return to its factory-calibrated value after
rehydration.
• If rehydration is not performed, the sensor may read a slight
offset that slowly disappears over time as the sensor becomes
exposed to ambient conditions. Conversely, extended
exposure to condensing and high humidity environments
(>90 %RH) may cause a revisable shift in readings which will
generally return to normal after the sensor has been allowed to
dry off.
To rehydrate the sensor, expose it to room temperature under
ambient conditions (>50 %RH) for a minimum of five hours.
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.
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.
009076-7-EN
May 2015
Copyright © 2015 Honeywell International Inc. All rights reserved.
Sensing and Control
Honeywell
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Golden Valley, MN 55422
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Find out more
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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.
To learn more about Honeywell’s
sensing and control products,
call +1-815-235-6847 or
1-800-537-6945, visit
sensing.honeywell.com, or e-
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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 particu-
lar purpose. In no event shall Honeywell be liable for conse-
quential, special, or indirect damages.
While we provide application assistance personally, through our
literature and the Honeywell website, 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.
ADDITIONAL INFORMATION
The following associated literature is available on the Web:
• Product installation instructions
• Product application note
• Application sheets:
– Humidity Sensor Performance Characteristics
– Humidity Sensor Theory and Behavior
– Humidity Sensor Moisture and Psychrometrics
– Humidity Sensor Chemical Resistivity
– Thermoset Polymer-Based Capacitive Sensors
• Technical Notes:
– I2C Communication with the Honeywell HumidIcon™ Digital
Humidity/Temperature Sensors
– SPI Communication with the Honeywell HumidIcon™ Digital
Humidity/Temperature Sensors
– Using Alarms on the Honeywell HumidIcon™ Digital
Humidity/Temperature Sensors
– Entering and Using Command Mode on the Honeywell
HumidIcon™ Digital Humidity/Temperature Sensors
