Fluke ii900 Software and Firmware Upgrade

To ensure your ii900-Series Acoustic Imager includes all the available features, make sure you have the latest version of operating firmware installed in.

In order to get notifications of future upgrades and updates, please register your Fluke ii900-Series Imager here: Fluke Product Registration

Use Fluke Connect Desktop to automate firmware updates: download Fluke Connect Desktop

Alternatively, instructions to upgrade Fluke ii900-Series using a SWU file:

  • Download the latest FLK-ii900-Series firmware here (.swu file)
  • The Fluke ii900 Series battery must be charged at least 25%.
  • Use the USB-C cable provided with the unit.
  • Connect the unit to a Windows computer and turn it on. Look for device named FLK-ii9XX on Windows file browser and copy the .SWU file in the root folder (‘user data’) of FLK-ii9XX unit.
  • Once the file is copied, your imager will detect it and ask to begin the firmware update. Select ‘Start Update’.
  • Once the firmware update is completed, your imager will ask to reboot the unit. Select ‘Restart’.

Fluke ii900-Series Acoustic Imager Firmware version V4.0 features:

FeatureFluke ii900 Industrial Acoustic ImagerFluke ii910 Precision Acoustic Imager
PDQ Mode™:
Provides a relative severity of a discharge, that provides information to the user on whether action may or may not be needed after PD has been detected
Estimate the size and cost of a leak Including a new distance-estimation feature and the 1-10 LeakQ™ severity index. Images can be uploaded to the online web to generate leak reports including leak size and cost estimation.
Available frequency modes
Standard frequency:
Standard frequency:
2 - 52 kHz
High frequency:
2 - 100 kHz
Grey scale:
Show and store image in grayscale
Multisource mode to view markers for multiple sources on screen
Improved and extended tag annotation

This update also includes bug fixes and other improvements:

  • Fixes an issue where the camera image could become too dark
  • Improved microphone health diagnosis
  • Notification if battery power is below 25% and does not allow firmware upgrade.
  • Improved text editor

Please find previous firmware version here:

Version 2.1 (link):

  - 2019 version, no leak-quantification functions

Version 3.0 (link):

 - 2020 version

 - Estimation of distance to the leak.

 - LeakQ™ mode

 - Leak-tags

 - Thumbnail function