New moisture-in-oil sensor offers continuous monitoring

To operate a gearbox, a transformer, or an industrial plant safely and reliably over a long period of time, it is often […]
IST’s new moisture-in-oil sensor is a ready-to-use, fully calibrated, digital humidity and temperature module. Credit: Innovative Sensor Technology

To operate a gearbox, a transformer, or an industrial plant safely and reliably over a long period of time, it is often necessary to monitor the condition of the lubricants with the support of sensor technology. For such monitoring jobs, Innovative Sensor Technology (IST) has developed the new moisture-in-oil sensor.

This is a compact, digital humidity and temperature module (RH/T) which measures the relative degree of saturation of water in percentage relative humidity in oils and fuels. This measurement method has a significant advantage compared to the measurement of absolute water content (in ppm water), because it always reflects the current condition and performance of the oil.

Every lubricant ages, and as a result, the oil's ability to absorb water changes in the long-term and the lubricant's performance decreases, which, in the worst case, can lead to machine downtime and expensive repairs. In terms of preventive maintenance, continuous monitoring of the oil's current water absorption capacity becomes more and more important.

With its robust and compact screw-in stainless steel housing, the new moisture-in-oil sensor is ideal for use in an industrial environment. Via a universal, digital electronic interface, the sensor can be easily integrated into various measuring and monitoring systems. The sensor is delivered temperature compensated and calibrated and a test board with analog (zero to 10 V) outputs is also available for evaluation purposes.

Key specifications include:

  • Continuous monitoring of temperature and degree of saturation of water in oil.
  • Operating ranges: 0 to 100 % RH; -40 to 120 °C.
  • Reproducibility: ±0.2 %RH; ±0.1 °C.
  • Accuracy: ±3% RH; ±0.2°C .
  • Housing: 1.4571 stainless steel, M14x1.5-mm thread.
  • Interface: digital I2C; 0.5-metre cable.

Customer orientation is a major focus at IST, hence IST AG offers application-specific assembly and calibration solutions to manufacturers of measuring instruments for this sensor.

Visit www.IST-AG.com for more information.

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