ADB Bearing Sensor


The ADB series can be used on any application where bearing temperature monitoring is needed. They have been designed to allow the depth of the probe to be adjustable depending on the application. This adjustability allows the tip of the probe to be placed in the optimal position for monitoring bearing temperature.


The sensor screws directly into the bearing housing using the threads of the existing grease zerk. The body of the ADB has an integrated zerk, allowing lubrication of the bearing without the need to remove the sensor.


The ADB style sensors are available with a standard NTC thermistor for 4B’s Hotbus and Watchdog systems, or a 4-wire PT100 - RTD type for PLC and DCS systems. Both types allow for continuous temperature monitoring.


The sensors are supplied with a nine foot cable. The connections are not polarity sensitive therefore special connection requirements are eliminated, and the cable can be extended in the field.



  ADB Bearing Temperature Sensor  

• NTC Thermistor and PT100 RTD Versions


• Adjustable Depth Temperature Probe


• Screws Into Existing Grease Zerk Location


• Integrated Zerk For Bearing Lubrication


• 304 Stainless Steel Body (1/2" NPT Conduit Entry)

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  NTC Type Specifications:   Literature:  
  • Resistance at 77 °F - 10,000 Ohms   Product Datasheet Download PDF  
  • Resistance at 140 °F - 3,043 Ohms      
  • Resistance at 194 °F - 1,264 Ohms   Technical:  
  • Sensing Voltage - 5 to 24 VDC   Product Manual Download PDF  
  • Current Draw - 1 mA (Max. Recommended)      
  • Maximum Power - 120 mW at 77 °F (25 °C)   Product Dimensions:  
  • Operating Temperature - Min. -22 °F (-30 °C)  Max. 220 °F (105 °C)   Download AutoCAD .dwg (AutoCAD)      Download PDF .pdf  
  • Body Housing - 304 Stainless Steel      
  • Fixing Thread - 1/8" NPT      
  • Cable - 9 ft. (3 m)  2 Conductor      
  PT100 / RTD Type Specifications:      
  • Resistance at 77 °F - 109.73 Ohms      
  • Resistance at 140 °F - 123.24 Ohms      
  • Resistance at 194 °F - 134.70 Ohms      
  • Temperature Coefficient - 3850 PPM/K (385)      
  • Sensing Voltage - 5 to 24 VDC      
  • Current Draw - 1 mA (Max. Recommended)      
  • Maximum Power - 1 mW      
  • Operating Temperature - Min. -22 °F (-30 °C)  Max. 220 °F (105 °C)      
  • Body Housing - 304 Stainless Steel      
  • Fixing Thread - 1/8" NPT      
  • Cable - 9 ft. (3 m)  4 Conductor      
  • CSA Class II Div 1 Groups E, F & G (U.S. & Canada)      
  • ATEX Version Available      
  CSA Certified  ATEX Certified  CE / European Conformity      
  Part Numbers and Accessories:      
  • ADB20V3C/D2 ~ NTC Type: 2 Inch Probe      
  • ADB20V3C/D3 ~ NTC Type: 3 Inch Probe      
  • ADB20V3C/D4 ~ NTC Type: 4 Inch Probe      
  • ADB20V3C/D6 ~ NTC Type: 6 Inch Probe      
  • ADB20V3C/D8 ~ NTC Type: 8 Inch Probe      
  • ADB20V3C/D10 ~ NTC Type: 10 Inch Probe      
  • ADB20V3C/D12 ~ NTC Type: 12 Inch Probe      
  • ADB20V3C/D16 ~ NTC Type: 16 Inch Probe      
  • ADB29V3C/D2 ~ PT100 - RTD Type: 2 Inch Probe      
  • ADB29V3C/D3 ~ PT100 - RTD Type: 3 Inch Probe      
  • ADB29V3C/D4 ~ PT100 - RTD Type: 4 Inch Probe      
  • ADB29V3C/D6 ~ PT100 - RTD Type: 6 Inch Probe      
  • ADB29V3C/D8 ~ PT100 - RTD Type: 8 Inch Probe      
  • ADB29V3C/D10 ~ PT100 - RTD Type: 10 Inch Probe      
  • ADB29V3C/D12 ~ PT100 - RTD Type: 12 Inch Probe      
  • ADB29V3C/D16 ~ PT100 - RTD Type: 16 Inch Probe      
  • ADBT4 ~ ADB Sensor Tester (See Accessories)      
  • ADBW ~ Adjustable Depth Sensor Wrench      
  Literature:   Product Dimensions:  
  Product Datasheet Download PDF   Dowload AutoCAD File .dwg     Download PDF File .pdf  
  ADB Product Manual Download PDF      
  RTD Wiring Overview Download PDF      
ADB Bearing Sensor Tester

ADB Bearing Sensor Tester

The ADB Sensor Tester has been designed to test 4B adjustable depth bearing (ADB) temperature sensors in the field.  During planned maintenance or periodic testing, this diagnostic tool to verify the alarm and shutdown sequences of the control unit are functioning as expected.

More Info

IE-Node Hazard Monitor

IE-Node Hazard Monitor

The Industrial Ethernet Node (IE-NODE) is a remote monitoring interface designed to provide sensor data to PLC’s or other automation and control systems. Both units can be expanded to 16 sensor inputs with the installation of optional expansion boards.

More Info

Watchdog Super Elite Hazard Monitor

Watchdog™ Super Elite Hazard Monitor

The Watchdog™ Super Elite processes signals from sensors for belt misalignment, belt speed & slip, continuous bearing temperature, pulley misalignment and plug conditions for bucket elevators or belt conveyors.

More Info

T500 Elite Hotbus Hazard Monitor

T500 Elite Hotbus™ Hazard Monitor

The T500 Elite Hotbus is a serial communications system designed to monitor up to 256 sensors on multiple bucket elevators and conveyors for belt speed, belt alignment, bearing temperature, level and plugged conditions.

More Info

T400N Elite Hotswitch Temperature Monitor

T400N Elite Hotswitch

The T400N Elite Hotswitch is a microprocessor controlled temperature monitor, which works in conjunction with NTC type temperature sensors.  The unit can provide an alarm and automatic shutdown, on up to 2 machines, when a hot temperature condition is detected.

More Info

  How can I test the ADB bearing temperature sensor to make sure it is working correctly?  
  The ADB Sensor Tester (sold separately) is available to test all ADB temperature sensors in the field.  See the  
  "Accessories" tab for more information.  
ADB Bearing Sensor
Bearing Sensor Installed
Bearing Sensor Installation Diagram
Pillow Block Bearing Cut Away Diagram
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Hot Bearing Failure
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ADB Bearing Sensor Intro.
ADB Bearing Sensor Install Guide
ADB Bearing Sensor Commissioning & Testing
ADB Bearing Sensor Tips & Tricks