Moisture sensors

Filtertechnik offer two types of water sensors for determining the quantity of water in oils, fuels and biofuels; our RH sensors and our WMS500 PPM sensors

RH Water Monitor: Our RH (Relative Humidity) water monitor gives the percent saturation of a given fluid. 100% saturation is the point at which suspended water becomes harmful free water. These sensors are lower cost and are very useful for hydraulic applications. Outputs are scaled and 4-20mA.

WMS500 PPM Sensor: Our Genuine PPM sensors are highly accurate parts per million (PPM) sensors and are particularly useful for transformer oils and diesel fuels or biofuel. The sensors are calibrated to a Karl Fischer device and fully temperature compensated.

To understand the different relationships between %RH and PPM please see below:

Parts per million (ppm)
:

Our PPM sensor gives a count of the absorbed water up to the saturation point of a given oil or fuel. Beyond the saturation point the sensor 'locks out' as free water will have formed.

Relative humidity: 


Relative Humidity or RH is expressed as a percentage. 100% RH equates to the maximum amount a given oil or fuel can hold (absorbed water) before it becomes saturated and free water forms.

To view all our quality control and instrumentation click here

Downloads

Contact Us

Quotation request