4B WDB83X Contact Bearing Temperature Sensors
WDB83x contact bearing sensors offer protection from overheating with built-in grease nipple, NC circuit, and PLC/monitor compatibility—simple, safe, reliable.
The WDB83x series is a range of contact bearing temperature sensors designed to provide reliable over-temperature protection for bearings. Each sensor is manufactured to screw directly into the bearing housing for direct contact monitoring and is equipped with a built-in grease nipple, allowing for lubrication without the need to remove the sensor.
The sensor includes a fixed two-core cable for easy connection to a monitoring device or junction box. As the wiring is not polarity sensitive, installation is simplified, and the cable can be extended in the field if needed.
All sensors in the WDB83x series operate in a normally closed (NC) state, meaning the circuit remains closed under normal conditions. When the preset temperature limit is exceeded, the bimetal element opens the circuit to trigger an alarm. The circuit automatically resets once the temperature drops back below the reset threshold. These sensors are primarily used for over-temperature protection in industrial applications.
Each sensor is supplied with a 3-meter cable and can be connected to a hazard monitoring system such as 4B’s IE-Node, Watchdog Super Elite, or directly to a PLC.
