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Humidity Measurement | MIO Transmitter | Moisture in Oil Products


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E+E Elektronik Compact Moisture in Oil Sensor


The robust, accurate and long term stable EE381 moisture in oil sensor is ideal for in-line monitoring of various oils as well as for predictive maintenance of plant and machinery.

  • Measuring range : 0…1 aw ,-40…120 °C (-40…248 °F)
  • Outputs : 0-1/5/10V or 0/4-20mA
  • Supply : 10-30V DC


The EE381 measures water activity [aw] and temperature [T], and calculates water content [x] in ppm in transformer, lubrication and hydraulic oil, as well as in diesel fuel.
The measured data is available on two analogue outputs and on the optional LCD display.
The robust metal EE381 enclosure can be rotated for optimal positioning of the display and the status LEDs.
An optional adapter and the free EE-PCS Product Configuration Software facilitate easy configuration and adjustment of the EE381.

Key Features

  • Measurands: water activity aw, temperature T and water content x in ppm
  • Oil temperature up to 120 °C (248 °F)
  • Two analogue outputs
  • LCD display
  • Status LEDs
  • Pressure rating 20 bar
  • G ½" ISO or ½" NPT process connection
  • Swirling front-end
  • Configurable and adjustable

Further Information:

Data Sheets