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Metal detector

Velleman K7102: Metal detector

Velleman K7102

Velleman K7102: Metal detector


There can be catastrophic consequences to coming up against electric cables while drilling a hole in a wall. Also, drilling into water, gas or central heating pipes can be very hazardous. With the Velleman K7102 Metal Detector, you can now determine beforehand whether there are metal objects behind your sheetrock, ceiling or floor. An LED light indicates if metal objects are in its vicinity. If audio signals are desired, space has been provided on the PCB for buzzer, type SV4/12-S, to be connected. The PCB has been specially constructed to entirely fit into to the separately available box type G407.



  • Metal detecting distance adjustable: up to 3.15"
  • Power supply: 9V battery (not incl.)
  • LED indication
  • 12VDC-buzzer connection (buzzer not included)
  • Dimensions: 2.2" x 2.5"


  • Avoid disasters when drilling holes in walls
  • Locate pipes, cables, metal studs, …
  • Great project for novices
  • Your own unique application
  • Push button operation

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