Wireless temperature monitoring for moving parts

The SENTRY® wireless bearing temperature monitoring system is capable of continuously measuring the metal temperature of bearings during compressor operation.

Ultimate equipment for bearing temperature monitoring

SENTRY® wireless bearing temperature sensor and antenna.

Each sensor is individually interrogated from a multiplexed signal processing unit using a high frequency and low energy radar pulse. The radar pulse is transmitted to the wireless sensor through a coaxial cable to a stationary antenna located inside the crank case. When within interrogation range of the stationary antenna the sensor responds to the radar pulse by reflecting a pulse pattern back to the signal processing unit. The characteristics of the reflected pulse is uniquely defined by the temperature.

Photo showing an installed SENTRY® wireless bearing temperature sensor.


The SENTRY® system is based on a sensor technology called Surface Acoustic Wave (SAW), which opens for non-contact wireless temperature sensing without using batteries or transmitting inductive power to the sensor. In this system the air-gap between the sensor and the stationary antenna can vary between 10 and 50 millimeters, providing an very flexible installation inside the crank-case.

Main benefits

  • Significantly reduced risk of unforeseeable repair costs
  • Compact and simple installation
  • Improved operational safety for crew and vessel
  • Type approved to replace oil mist detectors
  • Stand-alone or fully integrated with the alarm monitoring system

Main components

  • Wireless temperature sensor
  • Stationary reading antenna
  • Signal processing unit

Services and support

  • 24/7 Technical support

    Our 24/7 technical support team is there to help at any time, day or night, wherever your vessel is.

  • Conversions, retrofit and refit

    We understand the importance of having the right parts, available in the right place, at the right time.

  • Training

    Ensure that your crew is properly and thoroughly trained. This will reduce operational risk, downtime and maximise return on asset investment.