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The 311 series tip sensitive spring loaded bearing RTD probe sensor consists of a bearing probe, holder and optional connection head.
311 series spring loaded rtd probe

The quick release spring loaded holder allows for adjustability to ensure the Copper tip remains in contact with the bearing surface for reliable readings and faster time response.  Inserted at the opening on the bearing housing, they are used in electric motors and generators for continuous sensing of the bearing temperature. The T Quick fitting has a shorter quick release knob for use with a transmitter in a connection head.


  • Sheath Styles: Stainless Steel, Isolated Stainless Steel, Insulated Epoxy Glass, Copper Tip
  • Adjustable Spring Loaded Fitting, Fluid Sealed
  • Elements, Single and Dual: Platinum, Copper, Nickel
  • Sheath Diameters: 0.188”, 0.250”, 0.215”
  • Leadwire / Cable Options
  • Fast Response
  • Tip Sensitive 
  • Cut-To-Length 
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  • Electric Motors
  • Generators
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Other Sensors for Motors and Generators



Frequently Asked Questions


Q: What is an RTD?
A: An RTD (Resistance Temperature Detector) is a sensor whose resistance changes as its temperature changes.  The resistance increases as the temperature of the sensor increases.  The resistance versus temperature relationship is well known and is repeatable over time. An RTD is a passive device.  It does not produce an output on its own.  External electronic devices are used to measure the resistance of the sensor by passing a small electrical current through the sensor to generate a voltage.
Read More: Understanding RTDs

Q: What is the standard resistance of a platinum RTD?
A: Download the PDF: RTD Resistance Temperature Table Application Note



Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Sensor Type  Bearing Probe

  • Element Material  Copper, Nickel, Platinum

  • Lead Wire Style  PTFE

Usage Conditions

  • Maximum Temperature  250 °C [ 482 °F ]

Packaging Features

  • Element Package  Stainless Steel Probe With Copper Tip

Reference Number

  • TE Internal Number CAT-RTD0005

Related Materials

Datasheets & Catalog Pages

Terms and Conditions

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This information has been provided to your free of charge for your use but remains the sole property of TE Connectivity Corporation (''TE'') or SnapEDA,  Inc. or Ultra Librarian/EMA Design Automation, Inc. (collectively, "Company"). While Company has used reasonable efforts to ensure its accuracy, Company does not guarantee that it is error-free, not makes any other representation, warranty, or guarantee that the information is completely accurate or up-to-date. In many cases, the CAD data has been simplified to remove proprietary detail while maintaining critical interface geometric detail for use by customers. Company expressly disclaims all implied warranties regarding this information, including but not limited to any implied warranties or merchantability or fitness for a particular purpose.