EVAII Fiber Optic Accelerometer- Endwinding Vibration Monitoring

Single-Axis or Dual-Axis Fiber Optic Accelerometers for Measuring Stator End-Winding Vibration on Motors and Generators

Product Overview

Single-axis and dual-axis fiber optic accelerometer packages used to monitoring stator endwinding vibration and stator core vibration on generators and critical motors.

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

Iris Power EVAII sensor kits are non-metallic fiber optic accelerometers used to measure, analyze and trend vibration of the generator stator endwindings.

The sensors are able to simultaneously measure vibration in the radial and tangential directions safely in high voltage and magnetic fields found in air-cooled as well as hydrogen cooled generators.

Product Details


Sensor Packages

  • Single-Axis and Dual-Axis EVAII sensor configurations are available to measure radial and tangential vibrations.
  • Electro Optical Drivers (EOD) are provided for each fiber optic accelerometer channel to convert the vibration to a 100mV/g electrical output for analysis by a vibration monitoring instrument.
  • The EVAII sensors and the Electrical Optical Drivers are certified for hazardous areas however the enclosure with electrical optical drivers can also be situated outside the hazardous area on hydrogen generators.
  • The sensor kits for Hydrogen cooled generators include a multichannel feedthrough which uses a  25.4mm or 1″ frame penetration for up to 14 fiber optic accelerometer channels.


  •  ATEX / IECex certified fiber optic accelerometers (EVAII sensor kits)
  • ATEX / IECex certified electro optical drivers
  • 4-20mA remote Input-Output units are available

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

Stator End-Winding Vibration in Two-Pole Machines – Avoiding Generator Failure

IN THE PAST 15 YEARS, INSURANCE INDUSTRY DATA HAVE indicated that stator end-winding vibration has become the most important ...



Hands-on, practical experience

EL CID Training | Electromagnetic Core Imperfection Detection – October 1-3, 2024 – Iris Power, Toronto, Canada

Reasons to Take The Course Mechanical, electrical and environmental stresses can cause a breakdown in the inter-laminar insulation on Stator Core…


IRMC 2024 June 17-20, 2024 - Renaissance Las Vegas, Las Vegas NV

IRMC 2024

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