Ultimate equipment for bearing temperature monitoring
SENTRY® wireless bearing temperature sensor and antenna.
Photo showing an installed SENTRY® wireless bearing temperature sensor.
The SENTRY® wireless bearing temperature monitoring system is capable of continuously measuring the metal temperature of bearings during compressor operation. 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.
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.