Bearing Sensors

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Bearing temperature sensors for rotating machinery protection

Bearing temperature sensors give operators an early warning when lubrication, alignment, load, or cooling problems start driving bearing metal temperature upward.

Thermometrics builds RTD and thermocouple bearing sensors for motors, turbines, pumps, generators, and other rotating equipment, with case styles, lead exits, armor, and cable routing selected around the actual housing geometry and clearance limits.

Common Configurations

  • RTD sensing in platinum 100 ohm (Pt100) or platinum 1000 ohm (Pt1000), or thermocouple sensing
  • Single or dual element builds
  • Case styles A, B, C, and D with top, side, or rear lead exit options
  • Lead wire options for abrasion, heat, and routing demands

Key Advantages

  • Spring-loaded sensing formats to maintain thermal contact at the measurement point
  • 3-wire RTD options compatible with common PLC and DCS analog input schemes
  • High-accuracy RTD and thermocouple-based builds for predictive maintenance and protection
Bearing sensor product family with flanged cases, straight probes, armored leads, and wire exits

Bearing thermocouple and bearing RTD sensor examples.

Case Style Types

Case style / exit orientation selection guide

  • Type A — compact style for tight clearances and direct fit applications.
  • Type B (Top Hat) — raised top-hat profile for added clearance and lead protection.
  • Type C — side-exit lead configuration for constrained vertical space.
  • Type D — rear-exit lead configuration for in-line routing and protective housings.

How to Choose the Right Bearing Sensor

  • RTD bearing sensors with platinum 100 ohm (Pt100) or platinum 1000 ohm (Pt1000) elements for stable machine protection loops
  • Thermocouple-based builds where faster response or existing TC instrumentation is preferred
  • Bayonet assemblies with stainless contact tips first and copper-tip options where higher contact conductivity is needed
  • Single and duplex builds for redundancy, control, and shutdown logic

Information to Share for Quoting

  • Bearing housing style, available clearance, and preferred case geometry
  • Lead exit direction, wire protection, and routing constraints through the machine frame
  • Required sensing technology, wiring scheme, and instrument interface
  • Contact-tip shape, spring force, and installation environment around oil, vibration, and heat

Browse Bearing Sensor Product Pages

Choose the specialty page that best matches the sensing technology, case style, and machine-protection approach used in your rotating-equipment program.

BTC Bearing Thermocouples

Bayonet-style thermocouple bearing assemblies with stainless contact tips first and copper-tip options for rotating equipment.

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BRTD Bearing RTDs

Platinum 100 ohm (Pt100)-based bearing RTD assemblies for stable machine protection loops and API 670-oriented applications.

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Industries Where Bearing Sensors Are Common

Bearing temperature monitoring is usually tied to rotating-equipment reliability programs in these industries.

Industrial Machinery

Motors, gearboxes, and driven equipment where machine health and replacement fit matter.

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Energy & Power

Fans, pumps, turbine-adjacent equipment, and other critical rotating assets.

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Automotive & EV

Specialized rotating test stands, validation rigs, and machinery temperature points.

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Request a Bearing Sensor Quote

Provide bearing style, mounting method, lead length, range, and preferred sensor type (RTD or TC).

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