4B’s adjustable depth bearing (ADB) temperature sensors havebeen designed to allow the depth of the probe to be adjustable depending on the application. The ADB series are available with three standard probe lengths of 2, 4 or 8 inches (50, 100 and 200mm) and screw directly into a bearing housing through the existing grease zerk thread. There is no need to remove the sensor for bearing lubrication since each sensor is fitted with its own grease zerk. The ADB series have NTC type thermistors which allow for continuous temperature monitoring, and they can be connected to a PLC or to a hazard monitoring system, such as 4B’s T500 Hotbus Elite or Watchdog Elite. The ADB Series of bearing temperature sensors have been approved for use in hazardous areas according to ATEX, CSA and IECEx.
Other types of bearing temperature sensors are also available from 4B:
The WDB Series bearing temperature sensors screw directly into an existing grease zerk fitting on a bearing housing. Each sensor is fitted with a grease nipple to allow lubrication of the bearing without the need for removal of the sensor. The WDB Series is available with either a PTC thermistor with various factory set trip points or an NTC thermistor with a user adjustable trip point.
The MDB bearing sensors manufactured to screw directly into a bearing housing through the existing 1/4" BSPT threaded grease zerk (can be installed in 1/8" NPT grease zerk fitting with an adapter). Each sensor is fitted with a grease zerk to allow lubrication of the bearing without the need for removal of the sensor. The sensor is fitted with a M12 connector for use with a separately supplied cable and socket assembly which can be be attached connected directly to a PLC or to a hazard monitoring system. The connections are not polarity sensitive therefore special connection requirements are eliminated.
The 4B Group is a leading supplier of level controls, intelligent sensors and safety control systems that prevent costly downtime and minimize the risk of explosion in hazardous areas.
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