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Humidity Sensor Units
CHS Series CHS-U, -SS, -C Types
TDK’s CHS series humidity sensors are compact and extremely
simple to apply. Because they contain the necessary circuitry,
there is no need to provide additional control circuitry or perform
time-consuming calibration. With simple connection to a power
supply, they will output DC at 100% relative humidity. This makes it
possible to read RH directly with a voltmeter.
CHS-U TYPE
For industrial use and measuring equipment
? Characteristics are stable over a wide temperature range.
FEATURES
? These sensors can measure a wide range of humidity – from
5(%) to 95(%)RH.
? They are highly accurate. The nominal accuracy for the CHS-
UPR and CHR-UPS is within ±3(%) RH.
? Humidity sensing characteristics exhibit virtually no hysteresis.
? Highly cost-effective and compact, requiring extremely little
mounting space.
? Low current consumption.
? Outputs DC.1V at 100(%)RH; relative humidity can be read
Type
Nominal accuracy(%)RH
Measuring range(%)RH
CHS-UGS
CHS-UGR
±5
5 to 95
CHS-UPS
CHS-UPR
±3
5 to 95
directly with a voltmeter.
? All-in-one construction integrates sensor with support circuitry.
The entire module operates off a 5V power supply.
? Generated ripple at low humidity levels will not exceed 2.5mV.
SHAPES AND DIMENSIONS
SQUARE TYPE
CHS-UGS, -UPS
ROUND TYPE
CHS-UGR, -UPR
11.5max.
Sensible
side ?
6.5max.
Sensible
side ?
20max.
Sensible
side ?
Label
0.49
Label
1 2 3
0.49
Pin No. 1 Analog output voltage
Pin No. 2 GND
Pin No. 3 +Power supply voltage
Label
5
5
Pin No. 1 Analog output voltage
Pin No. 2 GND
Pin No. 3 +Power supply voltage
2.5
2.5
Weight: 1.38g typ.
1
3
2
MAXIMUM RATINGS (Ta=25°C)
? When installing the device, ensure that the humidity
Power supply voltage Edc
Operating conditions
Storage conditions
7V max.
0 to +50°C, power supply voltage 5V, without
dewing
–20 to +60°C, without dewing
sensing surface is not obstructed.
Weight: 1.68g typ.
Dimensions in mm
Tolerance: ± 0.2
? All specifications are subject to change without notice.
002-01 / 20100120 / eb111_chs.fm
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