Humidity Sensors
HIH Series
Relative Humidity
Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA
1-815-235-6847 International 1-800-737-3360 Canada
99
FEATURES
Linear voltage output vs %RH
Laser trimmed interchangeability
Low power design
High accuracy
Fast response time
Stable, low drift performance
Chemically resistant
TYPICAL APPLICATIONS
Refrigeration
Drying
Meteorology
Battery-powered systems
OEM assemblies
GENERAL INFORMATION
The HIH-3605 monolithic IC (Integrated
Circuit) humidity sensor is designed spe-
cifically for high volume OEM (Original
Equipment Manufacturer) users. Direct
input to a controller or other device is
made possible by this sensor's linear volt-
age output. With a typical current draw of
only 200 A, the HIH-3605 is ideally suit-
ed for low drain, battery powered sys-
tems.
The HIH-3605 delivers instrumentation
quality RH sensing performance in a low
cost, solderable SIP (Single In-line Pack-
age). Available in two lead spacing con-
figurations, the RH sensor is a laser
trimmed thermoset polymer capacitive
sensing element with on-chip integrated
signal conditioning.
ORDER GUIDE
Catalog Listing
Description
HIH-3605-A
Integrated circuit humidity sensor, 0.100 in. lead
pitch SIP
HIH-3605-A-CP
Integrated circuit humidity sensor, 0.100 in. lead
pitch SIP with calibration and data printout
HIH-3605-B
Integrated circuit humidity sensor, 0.050 in. lead
pitch SIP
HIH-3605-B-CP
Integrated circuit humidity sensor, 0.050 in. lead
pitch SIP with calibration and data printout.
MOUNTING DIMENSIONS (for reference only)
HIH-3605-A
HIH-3605-B
NIST CALIBRATION
HIH-3605 sensors may be ordered with a NIST calibration and
sensor specific data printout. Append ``-CP'' to the model
number to order.
RH SENSOR CONSTRUCTION
Sensor construction consists of a planar capacitor with a sec-
ond polymer layer to protect against dirt, dust, oils and other
hazards.
CAUTION
PRODUCT DAMAGE
The inherent design of this component causes it to be sensitive
to electrostatic discharge (ESD). To prevent ESD-induced
damage and/or degradation, take normal ESD precautions
when handling this product.
Humidity
Humidity Sensors
HIH Series
Relative Humidity
100
Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA
1-815-235-6847 International 1-800-737-3360 Canada
PERFORMANCE SPECIFICATIONS
Parameter
Conditions
RH Accuracy
(1)
2% RH, 0-100% RH non-condensing, 25
C, V
supply
5 VDC
RH Interchangeability
5% RH, 0-60% RH; 8% @ 90% RH typical
RH Linearity
0.5% RH typical
RH Hysteresis
1.2% of RH span maximum
RH Repeatability
0.5% RH
RH Response Time, 1/e
15 sec in slowly moving air at 25
C
RH Stability
1% RH typical at 50% RH in 5 years
Power Requirements
Voltage Supply
4 to 5.8 VDC, sensor calibrated at 5 VDC
Current Supply
200 A at 5 VDC, 2 mA typical at 9 VDC
Voltage Output
V
out
V
supply
(0.0062 (Sensor RH) +0.16), typical @ 25
C
(Data printout provides a similar, but sensor specific, equation at 25
C.)
V
supply
5 VDC
0.8 to 3.9 VDC output @ 25
C typical
Drive Limits
Push/pull symmetric; 50 A typical, 20 A minimum, 100 A maximum
Turn-on 0.1 second
Temp. Compensation
True RH (Sensor RH)/(1.093-.0012T), T in
F
True RH (Sensor RH)/(1.0546-0.00216T), T in
C
Effect @ 0% RH
0.007% RH/
C (negligible)
Effect @ 100% RH
-0.22% RH/
C (<1% RH effect typical in occupied space systems above 15
C (59
F))
Humidity Range
Operating
0 to 100% RH, non-condensing
(1)
Storage
0 to 90% RH, non-condensing
Temperature Range
Operating
-40
to 85
C (-40
to 185
F)
Storage
-51
to 125
C (-60
to 257
F)
Package
(2)
Three pin solderable ceramic SIP
Handling
Static sensitive diode protected to 15 kV maximum
Notes:
1. Extended exposure to 90% RH causes a reversible shift of 3% RH.
2. This sensor is light sensitive. For best results, shield the sensor from bright light.
OUTPUT VOLTAGE VS RELATIVE HUMIDITY (at 0
C)
OUTPUT VOLTAGE VS RELATIVE HUMIDITY
(at 0
C, 25
C, and 85
C)
PDF 
ZIP