PRODUCT DATASHEET Bearing Temperature Sensors APPLICATION For use on any application where bearing temperature monitoring is required. METHOD OF OPERATION The WDB 8 series bearing sensors are designed to screw directly into a bearing housing. Each sensor is fitted with a grease zerk to allow lubrication of the bearing without the need for removal of the sensor. The WDB8 series have a 1/4” BSPT thread. Three versions are available; an NTC thermistor or platinum RTD type for continuous temperature monitoring, and a PTC thermistor model with the following trip points (specify when ordering): 60°C, 70°C, 80°C and 90°C. The sensor is supplied with a three-meter attached cable and can be connected to a PLC or to a hazard monitoring system, such as 4B’s T500 Hotbus Elite, Watchdog Elite, or IE NODE. The connections are not polarity sensitive therefore special connection requirements are eliminated, and the cable can be extended in the field. FEATURES Screw in Positive Mount Installation ► Grease Zerk for Bearing Lubrication ► NTC Version - Continuous Temperature ► PT100 Version - Platinum RTD ► PTC Version - Trip Points from 50°C to 90°C ► ATEX Zone 20 and IECEx Approved WDB8 Series Bearing Sensor (ATEX / IECEx Approved) Part Number Thermistor Type ATEX Zone Continuous Temperature Monitoring Continuous Temperature Monitoring Note: 100°C, 110°C and 120°C Trip Point PTC sensors available on request. ATEX Zone 22; no IECEx Note: WDB Series 8 sensors have stainless-steel bodies and have Cable Entry. Not Conduit Entry. Note: 5 & 10-meter cable lengths can be purchased as a special request. Copyright © 2024 4B Group. All rights reserved. Information is subject to change or modification without notice. Refer to instruction manual for installation information. RE

PRODUCT DATASHEET WDB8 Series 1/4” BSPT Taper Thread Sensor with Grease Zerk Sensor Installed on Conveyor Bearing Installation of Bearing Temperature Sensor Example of Bearing Failure TECHNICAL SPECIFICATIONS WDB8 Series Bearing Temperature Sensors NTC Sensors Resistance at 25°C: 10,000 Ohms Resistance at 60°C: 2,487 Ohms Resistance at 90°C: 916 Ohms Sensing Voltage: 5 to 24 VDC Current Draw: 1 mA PTCSensors Resistance at 60°C: ≤ 250Ohms Resistance at Trip Point: ≥ 2,000 Ohms Sensing Voltage: 5 to 25 VDC Current Draw: 20 mA PT100 Sensors Resistance at 0°C: 100 Ohms Resistance at 100°C: 138.4...