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Liquid level controller

Velleman K2639: Liquid Level Controller Kit

Velleman K2639

Velleman K2639: Liquid Level Controller Kit

Save time and money with the Velleman K2639 Liquid Level Controller. This kit is easy to install in a variety of applications to prevent water leaks in your home. Use the liquid sensor to monitor the fluid level in your application. The Velleman K2639 can control the fluid level to keep it at a set amount indicated. It can also be set up to notify you by an alarm e.g. K2604 if the fluid level is too low or too high. Soldering is required for this kit.


  • Power supply: 12-14V AC or 16-18V DC / 100mA
  • Relay output: 240V / 3A max.
  • Dimensions:
    • Controller PCB: 4.1 x 2.4"
    • Sensor PCB: 4.1 x 1"

Additional Information

Difficulty Level 3


Parts list
English assembly instructions through illustrations, pictures, etc.

Assembly instructions
Written multilingual manual explaining how to build the kit

Info Sheets

Resistor colour code

Overview of Velleman modules that are equal to D.I.Y Kits
This sheet is useful when you want to know which modules you could find in the do-it-yourself range of Velleman Kits and minikits.

 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product