Datasheet

DATA SHEET
Technical changes reserved
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DescriptionDescription
0141 0316-34 08/2013
Technical data
Humidity sensor EFS-10
Measurement principle Electrolytic
Humidity-operating range
without condensation
20...95 % RH
Temperature-operating range 0...60 °C
Hysteresis < 2 % RH
Response time t
90 approx. 120 sec
Impedance 1,5 kΩ – 3 MΩ
Rating 0,2 mW max.
Measuring voltage 1V
eff, (2,8 VSS for sine wave)
Signal waveform
AC voltage
(without DC voltage ratio)
Measuring frequency 0,1-5 kHz, nominal 1 kHz
Dimensions (B x L x D) 5 x 10 x 1,6 mm
Connector SIL 30 mm, or customer specic
Electrolytic humidity sensor
EFS-10
Characteristic features
• Measuring range 20…95 % RH at 0…60 °C
• Simple evaluation
• Compact size
• No calibration needed
• Economic design
Areas of application
• Climate monitoring
• Consumer applications
• Ofce equipment
• Building instrumentation
• Cooling and air conditioning systems
• Air humidiers, air dryer
Features
The humidity sensor EFS 10 is an electrolytic type polymer sensor for
measurement of relative humidity. The sensor converts the prevailing
humidity value into impedance, which can be electronically measured.
The physical measurement principle is based on the characteristics of
a hygroscopic material whose conductivity changes as a function of
humidity in the environment.The humidity measuring range is right from
20 to 95 % RH. The measurement of impedance should be done with an
AC current (without DC-offset). The recommended operating frequency
is 1 kHz for a measuring voltage of maximum 1 V
eff.
The sensors of one production batch are identical in characteristics and
hence, for medium precision requirements, calibration can be skipped.
Because of this advantage, these sensors are ideally suited for price
sensitive consumer applications.
The sensors are resistant to common household chemicals including
cigarette smoke. However, the suitability for a certain application should
be checked by the user before hand.
B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon [phone] | Fax [phone] | [e-mail] | bb-sensors.com
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