TFProbe – Rotor Flux Monitoring

Rotor Magnetic Flux Sensor for Less Than 50mm Air Gap

Product Overview

The Total Flux Probe (TFProbe) is used for detection of shorted rotor windings in generators and synchronous motors where the air gap is less than 50mm by measuring air gap flux.

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Works with the Following Assets
Assists with the Following Type of Monitoring

The Iris Power Total Flux Probe (TFProbe) is a non-metallic sensor that detects the magnetic field emanated from each rotor pole in generators and synchronous motors to determine the presence and severity of failure mechanisms including out of round rotor, off center rotor, thermal imbalance of rotor poles, loose poles, stator Migration or shorted rotor turns.

These failure mechanisms can lead to decreased generator power, higher electrical losses, inability to meet the machine MVA rating, significant vibration and catastrophic ground faults.

Product Details


  •  The TFProbe, which is a small, thin, flexible, printed circuit board transducer affixed to a tooth in the stator
  • The low probe height facilitates rotor removal and introduction without damaging the probe
  • The TFProbe assembly includes the probe, probe cable and termination box.
  • Can be used with the portable Iris Power RFAII instrument, the Iris Power FluxTracII continuous monitor, or the Iris Power GuardII monitor
  • ATEX, IECEx, C-UL-US and INMETRO Hazardous location Certifications


Penetration assemblies are available for the folding flux probes  being installed on hydrogen cooled machines

Get a Quote

Call us at +1 905.677.4824 or Toll Free at +1 888-873-4747 or fill out our online quote form below.

Learning Center

This Resource Library is designed to provide current, relevant resources that provide technical knowledge and practical solutions for owners and operators of rotating machines. We encourage you to use the search feature and filters to locate specific resources of interest.


Articles, Technical Papers, & Case Studies

Results of Destructive Analysis of Service-Aged Hydrogenerator Stator Winding Insulation

SUMMARY The insulation system in form-wound stator windings is exposed to electrical, mechanical and thermal stresses, in addition to ...



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IRMC 2023 June 26-29, 2023 - Royal Sonesta Houston, Houston, TX

IRMC 2023

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