Datasheet

DATA SHEET
Technical changes reserved
0141 0316-305 04/2014
Humidity sensor KFS140-TO
DescriptionDescription
Characteristic features
• Humidity sensor in TO-Housing
• Integrated stainless steel sinter lter
• Pressure resistant model
• Mechanically robust
• Good linearity
• Dew formation resistant
• Alcohol resistant
• Low Hysteresis
• RoHS conformance
Areas of application
• Pressure dew point measurement
• Industrial application
Features
The KFS 140 is a capacitive humidity sensor in TO-housing with in-
tegrated stainless steel sinter lter. The mechanical construction
of the sensor is extremely robust because of the metallic housing.
Further specialities are its wide application range, low hystere-
sis and linear characteristics. The high performance polymer used
in the sensor is resistant against dew formation and many chemi-
cal effects and also guarantees an outstanding long-term stability.
The connections are vitried and air tight in the base pla-
te, so that the housing is suitable as a pressure tight separa-
ting point between the test chamber and evaluation electronics.
Typical areas of application are, for example, pressure dew point mea-
surement in pneumatic systems. Due to its optimum performance, the
sensor is also ideally suitable for meticulous jobs in industrial measu-
ring systems.
Technical data
Measuring principle Capacitive polymer humidity sensor
Humidity application range 0...100 % RH
Pressure range -1...+10 bar
Max. Dew point +80 °C
Temperature
application range
-30...+150 °C
Capacitance
180 pF ±50 pF (at 23 °C and 30 % RH)
Gradient 0,3 pF / % RH
Loss factor < 0,01
Hysteresis < 1,5 % RH
Response time < 30 s
Frequency range 1...100 kHz
Max. evaluation voltage < 12 Vpp ~
Signal form AC voltage (without DC-component)
Protection lter Stainless steel 40 µm
Housing TO 5
Dimensions Ø 9 x 19,5 mm
Ordering Number KFS140-TO
B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
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