- Screw in positive mount installation
- Grease zerk for bearing lubrication
- Adjustable depth probes (50, 100, 200 & 300mm)
- ADB81 - 1/4" BSPT mounting thread with cable entry
- ADB2 - 1/8'' NPT mounting thread with conduit entry
- NTC or PT100 thermistor - continuous temperature monitoring
Bearing Temperature Sensors
Overheated bearings are one of the main risk factors for dust explosions in bucket elevators and need to be closely monitored.
4B offers a range of Atex, CSA and IECEx certified bearing temperature sensors and compatible monitoring systems.

- Screw in positive mount installation
- Grease zerk for bearing lubrication
- WDB8 - 1/4” BSPT with cable entry (stainless steel body)
- WDB2 - 1/8” NPT with conduit entry (stainless steel body)
- WDB1 (Obsolete, use WDB8) - 1/8” NPT with cable entry (brass body)
- NTC version - continuous temperature
- Pt100 version - platinum RTD - continuous temperature
- PTC version - trip points from 50°C to 90°C - step response
- For use with T400, T400 Elite, T500 Elite, Watchdog Super Elite control modules or PLCs
- Surface mount type bearing sensors
- Suitable for mounting onto flat surfaces and any type of machinery, gearbox, or casing with a M8 mounting bolt or screw
- 1/2'' NPT conduit entry
- NTC version - continuous temperature
- PT100 version - platinum RTD
- PTC version - trip points from 50°C to 90°C
- Compatible with T400 Elite, T500 Elite or Watchdog Super Elite control modules
- Screw in installation
- Grease zerk for bearing lubrication
- Wiring connector
- NTC version - continuous temperature
- PT100 Version
- PTC or contact version - trip points from 50°C to 90°C
- Compatible with T400 Elite, T500 Elite or Watchdog Super Elite control modules
- 4-20 mA Output
- Screw in Positive Mount Installation (Bearing Temp.)
- Grease Zerk for Bearing Lubrication (Bearing Temp.)
- Lug Style Adaptor (Surface Temp.)
- 304 Stainless Steel Body