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digital thermometer - cheap small fast wide range?

Discussion in 'General Electronics' started by wle, Mar 2, 2005.

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  1. wle

    wle Guest

    is there such a thing as
    a digital thermometer - that is cheap small fast and wide range?

    what would be perfect is a regular medical type -
    if it would ONLY read from 0F to 200F.

    is there such a thing?

    specs:

    cost:
    < $20

    dimensions:
    long form factor : up to ball-point pen size,
    or short form factor: diameter of a quarter, 3/8 thick

    accuracy:
    +/- 2F

    range:
    -40F to 300F nice
    0F to 140F necessary

    speed:
    reads air temp within 10 sec
    this is the least important spec, it can take up to 60 sec
    if everything else is within specs.

    also i would like it to be on all the time, not have to press
    a button.

    battery life should be one year or more.


    wle.
     
  2. Robert Baer

    Robert Baer Guest

    National semiconductor makes ICs, one calibrated in Centigrade, one
    in Farenheit; both are capable of erpeatable and accurate measurements
    to 185C.
     
  3. I don't know if it meets all your specs but have you considered an electronic
    cooking/meat thermometer from your local grocery store? The one I have reads
    from -45C to +200C, cost about $15 and has a 4.5" stainless steel probe. The
    trademark is Good Cook.

    Hope this helps.
     
  4. wle

    wle Guest

    oh yeah!
    thanks.

    wle.
     
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