Dew Sensors - DPS Series

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The dew chip sensors DPS 0603 and DPS 1206 are ideal to detect the atmospheric dew on sensitive electronics. The DPS sensors change significantly their capacity above 98% relative humidity in response to water adsorption.

Figure 1 shows the typical functional performance of a DPS sensor in a typical application test circuit. In the circuit, the capacitance of the sensor is transferred into a frequency signal, which is temperature independent. The circuit uses the characteristic difference in electronic behavior between the two states “no dew” and “dew” on the sensor’s surface. For relative humidity values below 98%, the frequency level is around 80kHz. As soon as the sensor’s surface is bedewed, the frequency signal drops to a level below 1kHz.

 

FEATURES Reliable dew detection Fast response time Temperature independent SMD assembly

APPLICATIONS Consumer electronics Laptops Copiers and printers PCBs Household appliances Dryers Washing machines Microwaves Automotive Wind screens PCBs Climatic control Air conditioning Heating Industrial Control cabinets Leakage protection of water proofed boxes Rain sensors to adjust sprinkler systems

 

 

 

 

 Featured Products

Part Number		Description	Data Sheet	App. Notes
DPS060300G0P100		Dew Protection Sensor
DPS120600G0P100		Dew Protection Sensor

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