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pH meter, $22 new?!

Discussion in 'Electronic Design' started by William J. Beaty, Feb 26, 2004.

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  1. Jeeze! An pH meter for $35.
    Or $22 for the meter, $16 for the probe.
    Noticed by Roy O. at UW CES.

    Now why do these cost $60, or $80 ?

    Chem joke:

    At a recent public lecture I saw a "Science show."

    A chemist demonstrated the dangers of toxic zinc vapor.

    Needless to say, the audience was galvanized.


    Plush toys

    (((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))
    William J. Beaty SCIENCE HOBBYIST website
    EE/programmer/sci-exhibits amateur science, hobby projects, sci fair
    Seattle, WA 206-789-0775 unusual phenomena, tesla coils, weird sci
  2. A pH meter is not much more than a 7106 voltmeter chip/LCD display and
    the probe. You could probably make them for $5 if the market was big

    Best regards,
    Spehro Pefhany
  3. Si Ballenger

    Si Ballenger Guest

  4. Palinurus

    Palinurus Guest

  5. Si Ballenger

    Si Ballenger Guest

    If your device passes a current through the media that is being
    tested and the current is measured, then that is what you have
    weather the cost is $5 or $5k.
  6. Palinurus

    Palinurus Guest


    Is that what you imagine a pH meter does?
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