ProductDATASHEET Information PRODUCT Bearing Temperature Sensors APPLICATION For use on any application where bearing temperature monitoring is desired or required. METHOD OF OPERATION The MDB series is a range of 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” If you require ATEX approved Contact Sensors, NPT grease zerk fitting with an adapter). Each sensor is please check the WDB83 series on the website* 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 attached connected directly to a PLC or to a hazard monitoring system, such as 4B’s IE-NODE, Watchdog Super Elite, T500 Hotbus Elite, or ACCESSORIES T400 / T400 NTC Elite. The connections are not polarity Part Number Description ATEX sensitive therefore special connection requirements are Zone eliminated. Four versions are available, a NTC thermistor CA4SW03A 3m long cable; M12 to bare None model or PT100 type for continuous temperature monitoring, ended and PTC or Contact thermistor models with five trip points (60°C, 70°C, 80°C). CA4SW05A 5m long cable; M12 to bare None FEATURES Screw in Installation Grease Zerk for Bearing Lubrication Wiring Connector NTC Version – Continuous Temperature PTC or Contact Versions – Trip Points from 60°C, 70°C or 80°C PT100 Version NOT ATEX APPROVED. 10m long cable; M12 to bare ended 30m long cable; M12 to bare ended SENSOR SELECTION Part Number Thermistor Type ATEX Zone Continuous Temperature Monitoring Continuous Temperature Monitoring Copyright © 2025 4B Group. All rights reserved. Information is subject to change or modification without notice. Refer to instruction manual for installation information. REV013020

ProductDATASHEET Information PRODUCT MDB Series 1/4” BSPT Taper Thread Sensor with Grease Zerk Example of Bearing Failure Installation of Bearing Temperature Sensor Detailed specification, wiring diagrams and installation/operating instructions available immediately upon request. Bearing Temperature Sensors can be used with the following 4B Hazard Monitoring Systems TECHNICAL SPECIFICATIONS MDB 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 5 to 24 VDC Sensing Voltage: Current Draw: 1 ma PTC Sensors ≤...