Oil Moisture Meter TOR-1

Oil Moisture Meter

TOR-1 is a device for quick and precise measurement of the moisture content in insulation oil, even in miniscule quantities. 

The high sensitivity and excellent long-term stability make this tester an ideal solution for constant control of moisture content in transformer oil.

The TOET provides the following parameters:

  • active water; 
  • temperature; 
  • calculation of absolute water content in ppm.

TOR-1 components

The device includes all components for easy and comfortable use: 

  • two digital indicators: one for sample temperature, the other for moisture content in ppm;
  • a removable sample container;
  • two buttons: power and test start. 

Operating principle

The amount of water in the oil can be described as an absolute value in ppm or a relative value of aw:

  • ppm is the ratio of moisture weight to oil weight;
  • aw is the actual water content as a percentage of water content in fully saturated oil.

A value  of aw = 0 corresponds to completely dry oil, while aw = 1 corresponds to a completely saturated oil. 

The measurement with this sensor is based on exceptional long-term stability and resistance of capacitance sensor elements to contamination. The measured physical properties are water activity w and temperature T. Using these parameters, the device calculates the amount of water (ppm) in mineral transformer oil. The calculation of water content in non-mineral transformer oil and lubrication oil, may be performed by entering certain oil parameters.

Range 0…1 aw (aw – active water)
Precision at 20 °C ±0.02 aw (0…0.9 aw) ±0.03 aw (0.9…1 aw)
Temperature measurement Yes
Extra functionality High precision
Sample temperature, °С -40…80
Ambient temperature, °С -40…60

  • compact size;
  • simplicity of operation: to change the sample, simply change the sample container and press Start to begin the test;
  • versatility;
  • no need for PC connection;
  • can be used to test transformer oil in the field next to a transformer due to sufficient protection (metal anti-vandal buttons, protection of the sensor element, electric protection devices) and stabilized power source.

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