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Make a conductivity Tester

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Construction Of conductivity Tester Construction Of conductivity Tester Construction Of conductivity Tester

This is video tutorial of building of conductivity tester for different materials

Material :

  • Thick copper wire
  • LED
  • AA size dry cell 2
  • Scotch Tape
  • Rubber Band
  • Cutter
  • Sand Paper
  • Pliers
  • Rular

For construction steps watch Video.

Science of Conductivity Tester

A conductivity tester consist of two AA size dry cells connected in series, LED and two electrdes.

If sample is a good conductor, some amount of current will pass trhrough the LED and it will light , Its better to insert resistance of 300 ohm to protect the LED from over current.

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