Humidity Sensors are stable against chemical effects.

Press Release Summary:

Using capacitive polymer to measure humidity, KFS Series offers long-term stability and dew resistance. Surface mount Model KFS-MSMD, measuring 2.0 x 4.0 x 3.8 mm, does not require compensation circuitry and is suited for white goods, HVAC, and automotive applications. Housed in 2-pin package measuring 3.81 x 5.0 x 0.4 mm, Model KFS-140D features temperature range of -30 to 150°C and is suitable for climate monitoring, HVAC, and other environmental monitoring systems.

Original Press Release:

New Humidity Sensor Series Offers Long-Term Stability and Multiple Packaging Options

Servoflo Corporation of Lexington, Massachusetts is pleased to offer the KFS Series of humidity sensors from Hygrosens of Germany.

The KFS Series is a relative humidity sensor using a capacitive polymer to measure humidity. Key features of the KFS Series humidity sensor include its excellent price-to-performance ratio, good linearity, low hysteresis, compact size and dew resistance. The KFS Series is also stable against chemical effects.

Measuring only 2.0 mm X 4.0 mm X 3.8 mm, the KFS-MSMD is a surface mount version with a better signal-to-noise ratio then monolithic integrated sensors. As one of the smallest discrete humidity sensors in the world, the KFS-MSMD is priced under $7.00 for 1,000 pieces. Because of its excellent linearity and low temperature drift, additional compensation circuitry is not needed. Typical applications include white goods, HVAC, automotive and other applications where long-term stability is crucial.
The KFS-140D is another model in a 2-pin package. This low cost sensor is suitable for climate monitoring, HVAC, and other environmental monitoring systems. With its robust design, strong performance is achieved over a wide temperature range from -30°C to 150°C. With pricing at approximately $9.00 each for 1,000 pieces, the KFS-140D measures 3.81 mm x 5.0 mm x 0.4 mm.

Other variations of the KFS Series are also available, including version with an integrated temperature sensor and various performance characteristics.
For detailed datasheets and information on all Hygrosens humidity sensors, please visit

Servoflo is a provider of pressure sensors, humidity sensors, electronic compass modules, and sensor signal conditioners for the automotive, medical, process control, and other industrial applications. For information on all of Servoflo's product offerings, please visit

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