This download includes:

  • Firmware version 1.22 for Aqua TROLL 500
  • Firmware version 2.10 for Aqua TROLL 600


  1. Download the latest firmware from this page.
  2. Make sure the Win-Situ 5 application is closed.
  3. Unzip the downloaded file and move the contents to the Win-Situ Firmware folder. The default location for this folder is C:\Users\YourUsername\Documents\WinSituData\Firmware.
  4. Open Win-Situ and connect to the sonde. Click on the Device Setup tab. The new firmware will appear in the drop-down menu under Available Firmware Update. Select this option and click Update Device to complete the installation.