• All specifications are subject to change without notice.
• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.
CHS series
Humidity Sensor Units
Unit type
Type:
Issue date:
CHS-U (For industrial use and measuring equipment)
CHS-SS(For consumer and office equipment)
CHS-C(For consumer and office equipment)
January 2010
(1/6)
002-01 / 20100120 / eb111_chs.fm
• All specifications are subject to change without notice.
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
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.
• Characteristics are stable over a wide temperature range.
• 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
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 ROUND TYPE
CHS-UGS, -UPS CHS-UGR, -UPR
MAXIMUM RATINGS (Ta=25°C)
Ty p e CHS-UGS
CHS-UGR
CHS-UPS
CHS-UPR
Nominal accuracy(%)RH ±5 ±3
Measuring range(%)RH 5 to 95 5 to 95
Power supply voltage Edc 7V max.
Operating conditions 0 to +50°C, power supply voltage 5V, without
dewing
Storage conditions –20 to +60°C, without dewing
2.5 2.5
0.49
(3.8)27max.
6.5max.
11.5max.
5.7±0.5
Label
Pin No. 1 Analog output voltage
Pin No. 2 GND
Pin No. 3 +Power supply voltage
Weight: 1.38g typ.
123
Sensible
side∗
Sensible
side∗
20max.
55
5±0.5 9max.5
Label
Label
Sensible
side∗
∗When installing the device, ensure that the humidity
sensing surface is not obstructed.
Weight: 1.68g typ.
Dimensions in mm
Tolerance: ±0.2
1
2
3
0.49
Pin No. 1 Analog output voltage
Pin No. 2 GND
Pin No. 3 +Power supply voltage
(2/6)
002-01 / 20100120 / eb111_chs.fm
• All specifications are subject to change without notice.
CHS-U TYPE
ELECTRICAL CHARACTERISTICS
∗( ): Reference value
TYPICAL CHARACTERISTICS
SENSOR LINEARITY CHARACTERISTICS (Ta=25°C Edc=5V) TEMPERATURE DEPENDENCY CHARACTERISTICS
Item Specifications Conditions
Minimum Standard Maximum
Operating voltage Edc (V) 4.75 5 5.25
Operating current(mA) 0.6 Edc=5V, 25°C
Output voltage(mV)/(%)RH 10 Edc=5V, 25°C, 5 to 95(%)RH
Output impedance(kΩ) (200)∗at DC
Accuracy(%)RH CHS-UPS, -UPR –3 +3 Edc=5V, 25°C, 5 to 95(%)RH
(For details, please refer to typical characteristics)
CHS-UGS, -UGR –5 +5
Hysteresis(%)RH ≈0 Stable time: 20min
Temperature dependency(%)RH –5 +5 Edc=5V, 25°C standard, +5 to +45°C, 5 to 95(%)RH
Response time(min) 1Response time to reach 90% of actual humidity as for from 30 to
85(%)RH
Recommended operating temperature(°C) +5 +45 Edc=5V
Center line
Allowance
Typical value
Tolerance of each humidity
UP TYPE ±3(%)RH
UG TYPE ±5(%)RH
1
0.8
0.6
0.4
0.2
00 20406080100
Relative humidity(%)RH
Output voltage(V)
(+3(%)RH)+5(%)RH
–5(%)RH(–3(%)RH)
Typical value Specification temperature zone
+5 to +45˚C(5 to 95(%)RH)
Tolerance of each humidity
±5(%)RH
1
0.8
0.6
0.4
0.2
00 1020304050
Temperature(˚C)
Output voltage(V)
20(%)RH
30(%)RH
40(%)RH
50(%)RH
60(%)RH
70(%)RH
80(%)RH
90(%)RH
95(%)RH
10(%)RH
5(%)RH
(3/6)
002-01 / 20100120 / eb111_chs.fm
• All specifications are subject to change without notice.
CHS-SS TYPE
For consumer and office equipment
FEATURES
• Humidity sensing characteristics exhibit virtually no hysteresis.
• Compact size.
• Low current consumption.
• Outputs DC.1V at 100(%)RH; relative humidity can be read
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.
MAXIMUM RATINGS (Ta=25°C)
SHAPES AND DIMENSIONS
SQUARE TYPE
ELECTRICAL CHARACTERISTICS
∗( ): Reference value
Type CHS-MSS
Nominal accuracy(%)RH ±5
Measuring range(%)RH 20 to 85
Power supply
voltage Edc 7V max.
Operating
conditions 0 to +50°C, power supply voltage 5V, without dewing
Storage
conditions –20 to +60°C, without dewing
CHS SS
10max.
20max.
(7)
Vout G+5
5max.
0.5 0.25
R
2.52.5
123
Label
∗2
Sensible
side∗1
Sensible
side∗1
∗1When installing the device, ensure that the humidity
sensing surface is not obstructed.
∗2The three leads are parallel to within 0.2mm.
Weight: 1.1g typ.
Dimensions in mm
Tolerance: ±0.2
Pin No. 1 Analog output voltage
Pin No. 2 GND
Pin No. 3 +Power supply voltage
Item Specifications Conditions
Minimum Standard Maximum
Operating voltage Edc (V) 4.75 5 5.25
Operating current(mA) 0.6 Edc=5V, 25°C
Output voltage(mV)/(%)RH 10 Edc=5V, 25°C
Output impedance(kΩ) (200)∗at DC
Accuracy(%)RH –5 +5 Edc=5V, 25°C, 20 to 85(%)RH(For details, please refer to typical
characteristics)
Hysteresis(%)RH ≈0 Stable time: 20min
Temperature dependency(%)RH –5 +5 Edc=5V, 25°C standard
Response time(min) 1 Response time to reach 90% of actual humidity as for from 30 to 85(%)RH
Recommended operating
temperature(°C) +15 +35 Edc=5V, without dewing(For details, please refer to typical characteristics)
(4/6)
002-01 / 20100120 / eb111_chs.fm
• All specifications are subject to change without notice.
CHS-SS TYPE
TYPICAL CHARACTERISTICS
SENSOR LINEARITY CHARACTERISTICS (Ta=25°C Edc=5V) TEMPERATURE DEPENDENCY CHARACTERISTICS
CHS-MSS TYPE CHS-MSS TYPE
+5(%)RH
–5(%)RH
Center line
Allowance
Typical value
1
0.8
0.6
0.4
0.2
0
Output voltage(V)
0 20406080100
Relative humidity(%)RH
±5(%)RH specification temperature zone
Not specification temperature zone
1
0.8
0.6
0.4
0.2
0
0 1020304050
Temperature(˚C)
Output voltage(V)
90(%)RH
95(%)RH
40(%)RH
30(%)RH
10(%)RH
5(%)RH
70(%)RH
60(%)RH
20(%)RH
50(%)RH
80(%)RH
(5/6)
002-01 / 20100120 / eb111_chs.fm
• All specifications are subject to change without notice.
CHS-C TYPE
For consumer and office equipment
FEATURES
• Temperature detection thermistor can be added.
• Humidity sensing characteristics exhibit virtually no hysteresis.
• Low current consumption.
• Absolute humidity can be read directly with DC. 1V voltmeter.
• All-in-one construction incorporates circuits and 5V power
supply operation.
• Generated ripple at low humidity levels will not exceed 2.5mV.
MAXIMUM RATINGS (Ta=25°C)
SHAPES AND DIMENSIONS
ELECTRICAL CHARACTERISTICS
RECOMMENDED CHARACTERISTICS OF TEMPERATURE
DETECTION THERMISTOR
Type CHS-CMC-_ _
Nominal accuracy(%)RH ±5
Measuring range(%)RH 30, 50, 80
Power supply voltage Edc 7V max.
Operating conditions 0 to +50°C, power supply voltage 5V, without
dewing
Storage conditions –20 to +60°C, without dewing
4max.
15max.1.5
7.0
(5)
20
2-ø4.1±0.1
34
5.517
(7)
28
Pin No. 1 +5V
Pin No. 2 Humidity output
(RHV)
Pin No. 3 GND•TH1
Pin No. 4 TH2
Dimensions in mm
Tolerance: ±0.5
Connector
Components mounting region
4
3
2
1
Humidity sensor
Item Specifications Conditions
Minimum Standard Maximum
Operating voltage Edc (V) 4.75 5 5.25
Operating current(mA) 0.6 Edc=5V, 25°C
Output impedance(kΩ) (200) at DC
Accuracy(%)RH
30(%)RH –5
(0.5V) (0.6V)
+5
(0.7V) Edc=5V, 25°C
(For details, please refer to typical characteristics)50(%)RH –5
(0.86V) (0.96V)
+5
(1.06V)
80(%)RH –5
(1.5V) (1.6V)
+5
(1.7V)
Hysteresis(%)RH ≈0 Stable time: 20 min
Temperature dependency(%)RH –5 +5 Edc=5V, 25°C standard
(For details, please refer to typical characteristics)
Response time(min) 1 Response time to reach 90% of actual humidity as for from
30 to 85(%)RH
Recommended operating
temperature(°C) +15 +35 Edc=5V
Part No. NTCCM16084BH103JC
Resistance value(Between TH1 and TH2) 10kΩ±5%
Constant B 4100K±3%
Maximum rated power 230mW
(6/6)
002-01 / 20100120 / eb111_chs.fm
• All specifications are subject to change without notice.
CHS-C TYPE
TYPICAL CHARACTERISTICS
SENSOR LINEARITY CHARACTERISTICS(Ta=25°C, Edc=5V) TEMPERATURE DEPENDENCY CHARACTERISTICS
TYPICAL APPLICATIONS
HUMIDITY MONITOR BATTERY POWERED SYSTEM
Typical value
Specification temperatue zone
2
1.6
1.2
0.8
0.4
0
Output voltage(V)
0 20406080100
Relative humidity(%)RH
±5(%)RH specification temperature zone
Not specification temperature zone
2
1.6
1.2
0.8
0.4
0
0 1020304050
Temperature(˚C)
Output voltage(V)
+5V
10µFHumidity
output signal
1
3
2
1.5V×4
Humidity
output signal
1
3
2
