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Sensing and Control
Honeywell Inc.
11 West Spring Street
Freeport, Illinois 61032
Humidity Sensors
Relative Humidity
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
HIH Series
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
HIH-3605-A
HIH-3605-A-CP
HIH-3605-B
HIH-3605-B-CP
Description
Integrated circuit humidity sensor, 0.100 in. lead
pitch SIP
Integrated circuit humidity sensor, 0.100 in. lead
pitch SIP with calibration and data printout
Integrated circuit humidity sensor, 0.050 in. lead
pitch SIP
Integrated circuit humidity sensor, 0.050 in. lead
pitch SIP with calibration and data printout.
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.
MOUNTING DIMENSIONS
(for reference only)
HIH-3605-A
HIH-3605-B
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
Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA
1-815-235-6847 International 1-800-737-3360 Canada
99
Humidity Sensors
Relative Humidity
PERFORMANCE SPECIFICATIONS
Parameter
RH Accuracy
RH Linearity
RH Hysteresis
RH Repeatability
RH Response Time, 1/e
RH Stability
Power Requirements
Voltage Supply
Current Supply
Voltage Output
V
supply
5 VDC
Drive Limits
Temp. Compensation
Effect @ 0% RH
Effect @ 100% RH
Humidity Range
Operating
Storage
Temperature Range
Operating
Storage
Package
(2)
Handling
(1)
HIH Series
Conditions
±2%
RH, 0-100% RH non-condensing, 25°C, V
supply
±5%
RH, 0-60% RH;
±8%
@ 90% RH typical
±0.5%
RH typical
±1.2%
of RH span maximum
±0.5%
RH
15 sec in slowly moving air at 25°C
±1%
RH typical at 50% RH in 5 years
4 to 5.8 VDC, sensor calibrated at 5 VDC
200 A at 5 VDC, 2 mA typical at 9 VDC
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.)
0.8 to 3.9 VDC output @ 25°C typical
Push/pull symmetric; 50 A typical, 20 A minimum, 100 A maximum
Turn-on
≤0.1
second
True RH (Sensor RH)/(1.093-.0012T), T in
°F
True RH (Sensor RH)/(1.0546-0.00216T), T in
°C
±0.007%
RH/°C (negligible)
−0.22%
RH/°C (<1% RH effect typical in occupied space systems above 15°C (59°F))
0 to 100% RH, non-condensing
(1)
0 to 90% RH, non-condensing
−40°
to 85°C (−40° to 185°F)
−51°
to 125°C (−60° to 257°F)
Three pin solderable ceramic SIP
Static sensitive diode protected to 15 kV maximum
5 VDC
RH Interchangeability
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)
100
Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA
1-815-235-6847 International 1-800-737-3360 Canada
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