Measurement and testing
Compact Transmitter for Moisture in Oil Measurement
Mar 23 2011
The new Series EE381 transmitter from E+E Elektronik enables precise measurement of moisture content in oil in the range 0…1 aw at temperatures from -40...80°C (-40…176°F).
The monolithic humidity / temperature sensor element, specifically designed for that application, provides outstanding accuracy and very good long-term stability. Fast response time and high resistance against chemical pollutants are the main features of this sensor element HMC01, developed by E+E Elektronik in thin film technology.
Measured variables are water activity aw [0…1], temperature T [°C or °F] and the calculated water content x [ppm]. The EE381 can be adjusted for measurement of non-mineral oils by entering the particular oil-specific parameters.The sensing head is pressure tight up 100 bar (1450 psi) and can be mounted either with a G½” ISO or a ½” NPT thread. The rugged, compact metal housing of Series EE381 is rotatable over the full 360 degrees, allowing positioning for excellent readability of the optional dual-line display and easy accessibility of the robust industrial electrical connector - even in difficult mounting situations. Both analogue outputs are freely scalable and configurable. It is possible to have the transmitter equipped with switching outputs. Status indicators provide easy on-site diagnostics. Typical applications are monitoring of transformer oil, hydraulic oil, motor oil of ship engines and lubrication oil of bearings.
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