HIH-4602-A/C Series
Humidity Sensors
DESCRIPTION
HIH-4602-A/C Series Relative Humidity (RH) sensors combine
both relative humidity and temperature sensing in a TO-5
housing with a hydrophobic sintered stainless steel filter.
The laser-trimmed, thermoset polymer capacitive sensing
elements have on-chip integrated signal conditioning.
The temperature sensor is thermally connected with the RH
sensor making the HIH-4602-A/C often ideal for measuring
dew point and other absolute moisture terms.
FEATURES
•
Near linear voltage output vs %RH
•
Laser-trimmed interchangeability
•
Enhanced accuracy, fast response
•
Chemically resistant
•
Stable, low drift performance
•
Built-in static protection
•
Often ideal for dew point and absolute moisture
measurements
•
TO-5 housing
POTENTIAL APPLICATIONS
•
Refrigeration
•
Drying
•
Meteorology
•
Battery-powered systems
•
OEM (Original Equipment Manufacturer) assemblies
The HIH-4602-A contains an integral thermistor, while the HIH-
4602-C contains an integral precision RTD.
Factory calibration data supplied with each sensor allows
individually matched downstream electronics and ±3.5 %RH
total accuracy.
HIH-4602-A/C Series
TABLE 1. PERFORMANCE SPECIFICATIONS (At 5 Vdc supply and 25
ºC
[77
ºF]
unless otherwise noted.)
Parameter
Interchangeability (first order curve)
0% RH to 59% RH
60% RH to 100% RH
Accuracy (best fit straight line)
Hysterisis
Repeatability
Settling time
Response time (1/e in slow moving air)
Stability (at 50% RH in one year)
Voltage supply
Current supply
Output voltage temp. coefficient at 50% RH, 5 V
Voltage output (1st order curve fit)
Temperature compensation
Operating temperature
Operating humidity
Storage temperature
Storage humidity
Specific Notes:
1. Device is calibrated at 5 Vdc and 25
ºC.
2. Non-condensing environment.
Minimum
–
-5
-8
-3.5
–
–
–
–
–
4
–
–
Typical
Maximum
Unit
Specific
Note
–
–
–
1
–
–
–
–
–
–
–
–
–
–
–
5
% RH
–
8
% RH
–
% RH
–
+3.5
3
% RH
–
±0.5
% RH
–
70
ms
–
50
s
–
±1.2
% RH
–
5.8
Vdc
–
500
µA
200
-4
–
mV/ºC
V
OUT
=(V
SUPPLY
)(0.0062(sensor RH) + 0.16), typical at 25
ºC
True RH = (sensor RH)/(1.0546-0.00216T), T in
ºC
-40[-40]
See Figure 1.
85[185]
ºC[ºF]
–
0
See Figure 1.
100
% RH
2
-50[-58]
125[257]
ºC[ºF]
–
–
See Figure 2.
% RH
2
General Notes:
•
Sensor is ratiometric to supply voltage.
•
Extended exposure to >90% RH causes a reversible shift of
3% RH.
•
Sensor is light sensitive. For best performance, shield sensor
from bright light.
TABLE 3. HIH-4602-A NTC THERMISTOR TEMPERATURE
SPECIFICTIONS
Rb = 100 kOhm ±5% at 25
ºC
Beta = 4250, 25
ºC
to 85
ºC
1/T = a + b(Ln R) + c(Ln R) ^ 3, T in degrees K
Low
Mid
High
a = 0.000828083
b = 0.000208691
c = 8.0812E-08
TABLE 4. HIH-4602-C RTD TEMPERATURE SENSOR
SPECIFICATIONS
Thin film platinum RTD – Class 2B (Ro: ±0.25%)
DIN EN 60571 (PER IEC 751)
TCR = 3750 ppm/ºC
1000 Ohm at 0
ºC
[32
ºF]
Temp.
ºC
0
50
100
Resistance
351000
33590
5569
FACTORY CALIBRATION DATA
HIH-4602 Sensors are supplied with a calibration and data
printout. See Table 2.
TABLE 2. EXAMPLE DATA PRINTOUT
Model
HIH-4602-C
Channel
92
Wafer
030996M
MRP
337313
Calculated values at 5 V
0.826 V
V
OUT
at 0% RH
3.198 V
V
OUT
at 75.3% RH
Linear output for 3.5% RH
accuracy at 25 °C
Zero offset
0.826 V
Slope
31.483 mV/%RH
RH
(V
OUT
- zero offset)/slope
(V
OUT
- 0.826)/0.0315
Ratiometric response for
0% RH to 100% RH
V
OUT
V
SUPPLY
(0.1652 to 0.7952)
2
www.honeywell.com/sensing
Humidity Sensors
FIGURE 1. OPERATING ENVIRONMENT (Non-condensing environment.)
FIGURE 2. STORAGE ENVIRONMENT (Non-condensing environment.)
Honeywell Sensing and Control
3
HIH-4602-A/C Series
FIGURE 3. TYPICAL OUTPUT VOLTAGE VS RELATIVE HUMIDITY (At 25 ºC and 5 V.)
4
3.5
3
Output Voltage (Vdc)
2.5
Sensor Response
Sensor Response
Best Linear Fit
2
1.5
1
0.5
0
20
40
60
80
100
Relative Humidity (%RH)
FIGURE 4. TYPICAL OUTPUT VOLTAGE (BFSL) VS RELATIVE HUMIDITY (At 0
ºC, 70 ºC and 5 V.)
4.5
4
3.5
3
Output Voltage (Vdc)
2.5
2
1.5
0C
70 C
1
0.5
0
0
10
20
30
40
50
60
70
80
90
100
Relative Humidity (%)
4
www.honeywell.com/sensing
Humidity Sensors
FIGURE 5. HIH-4602-A/C 1MOUNTING DIMENSIONS (For reference only. mm/[in])
1. Case ground
2. Vdc out
3. (-) Power or ground
4. (+) Vdc supply
5., 6. HIH-4602-A thermistor for temperature compensation
5., 6. HIH-4602-C RTD for temperature compensation
FIGURE 6. RH SENSOR CONSTRUCTION
Sensor construction consists of a planar capacitor with a second polymer layer to protect against dirt, dust, oils and other hazards.
Honeywell Sensing and Control
5
测试/测量
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