Datasheet

DATA SHEET
Dew point sensor SHS-A5
0141 0316-138 07/2012 B+B Thermo-Technik GmbH | Heinrich-Hertz-Str. 4 | D-78166 Donaueschingen
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Technical Data
Resistive Dew point sensor SHS-A5
Measuring principle resistive humidity sensor,
additional conductance sensoring structure
Humidity range 0...100% relative humidity
Temperature range 0...60 °C
Impedance at RH<75% < 20 k Ohm
Impedance at RH<93% < 100 k Ohm
Impedance at RH>97% > 150 k Ohm
Interdigital structure Conductance structure, approx. 10 µS
max. evaluation
voltage
Res. Sensor < 0.8 V pp ~/=
Conductance < 2 V pp ~
Base substrate Ceramic, 20 x 10 x 0,6 mm
Contacts 3 SIL-contacts
RM 2.54 mm, l=20 mm
Ordering No. SHS-A5
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Characteristic features
• Detection of high humidity, dew formation or condensation
• Additional interdigital structure for independent detection of water
• Application range from 0% to 100 RH, 0 to 60 °C
• Model with SIL-contacts for PCB
Typical areas of application
• Building instrumentation, cool ceiling controller, air-conditioning
• Moisture protection in switcher panels and electrical equipment
• Monitoring of flat roofs
• Condensate detection in outside directed walls
• Ventilation control in sanitory rooms
• Leakage monitor for waterproof housings
Features
The Humidity sensor SHS A5 is a combined sensor for detecting the onset
of condensation with additional interdigital structure (conductance sensor)
for detection of liquid water or condensate. The exponentially rising resistive
characteristics in the upper humidity region facilitates simple signal
processing and a stable switching behaviour on dew formation threshold.
The ceramic substrate can become a thermal contact on the reverse side to
sense surface humidity. Through SIL-contacts, the component can be
directly mounted on the printed circuit board.