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Compact Moisture in Oil Transmitter


The compact form and rugged housing make the HLX364 moisture in oil transmitter suitable for integration in OEM applications. Due to the high accuracy and excellent long term stability, the HLX364 is ideal for online monitoring of moisture content in lubrication and insulation oil, as well as diesel fuel.
Available measurands are water activity (aw), water content (x) in ppm, as well as oil temperature (t). The measured values are available on two 4-20 mA outputs and one digital output with MODBUS interface.

  • Measurement of water activity (aw), temperature and water content (x) in ppm
  • Two configurable 4…20 mA outputs
  • MODBUS-RTU interface
  • Pressure rating 20 bar
  • G ½" ISO or ½" NPT process connection
Typical Applications: Monitoring of
  • Transformer oil
  • Lubrication oil
  • Hydraulic oil
  • Engine oil
  • Diesel fuel
Techn. data
Measuring range0...1 aw // -40...80°C
Accuracy ±0.02 aw // ±0.2°C
Supply 10...28 V DC
Ouputs 2 x 4-20 mA // MODBUS RTU
Technical Specifications
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