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Ask an Expert Forum It is impossible to online buy a cheap Non-contact Direct Current voltage tester pens.
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It is impossible to online buy a cheap Non-contact Direct Current voltage tester pens.

z234
z234 over 2 years ago

Dear friends,

I found it is impossible to online buy a cheap Non-contact Direct Current voltage tester pens.

They only sell AC pens.

Does anyone know where to buy cheap Non-contact Direct Current (DC) tester pens , that is not those very expensive Fluke pens?

Thanks for all your great help and May God bless you and your family Two hearts Pray

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Top Replies

  • kmikemoo
    kmikemoo over 1 year ago in reply to kmikemoo +5
    So the ET30 arrived at 9:45pm on the day it was supposed to. Preliminary play shows it responds to real magnets, even the fairly weak hobby magnets. It does not respond to anything made of or resembling…
  • Gough Lui
    Gough Lui over 2 years ago +4
    In general, AC emits alternating magnetic fields which are easy to measure and radiate some distance. By contrast, DC emits a static magnetic field which is much more difficult to detect and measure as…
  • javagoza
    javagoza over 1 year ago in reply to kmikemoo +4
    Magnetic sheets have a very curious magnetic field. https://en.wikipedia.org/wiki/Halbach_array Flux distribution for a refrigerator magnet Cancellation of magnetic components resulting in a…
Parents
  • dougw
    0 dougw over 2 years ago

    DC voltage creates an electric field which is difficult to measure because any conductor can short out or modify the electric field. DC current creates a magnetic field which is also tough to measure accurately as Gough Lui  points out.

    Electric field meters exist but as you mention, they don't tend to be cheap.

    Here is an article on one way to measure electric fields...

    https://www.eeeguide.com/dc-electric-field-strength-meter/#:~:text=The%20DC%20Electric%20Field%20Strength,currents%20sensed%20by%20the%20electrodes.

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  • dougw
    0 dougw over 2 years ago

    DC voltage creates an electric field which is difficult to measure because any conductor can short out or modify the electric field. DC current creates a magnetic field which is also tough to measure accurately as Gough Lui  points out.

    Electric field meters exist but as you mention, they don't tend to be cheap.

    Here is an article on one way to measure electric fields...

    https://www.eeeguide.com/dc-electric-field-strength-meter/#:~:text=The%20DC%20Electric%20Field%20Strength,currents%20sensed%20by%20the%20electrodes.

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