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    Accurate thermometer needed

    Banned
    Hi, Where can I get an accurate thermometer?
    And how will I know it's reading true?
    I had 4 in my fridge last night and all were reading diferent! Pah!
    2 were digital and 2 were old fashioned prongy ones.
    I've been put off buying thermometers many times because when I see some on display they are all reading diferent so THEY can't be any good.
    It's getting my temperature up....:-(
    If you suggest any, can you qualify how you know it will read true please?

    2 Comments

    Look for one with an NPL [National Physics Laboratory] certificate. For a properly certified thermometer you should get change out of £100 and you should get it re-certified every 5 years.
    Or - if they ready that high. Put the ends in to boiling water [but not touching the bottom of the pan]. Don’t ever put them in a microwave!
    The boiling water will have to be 100c.
    Then just take the best and put them in a glass of ice and water.
    That should be 0c.
    The one that reads closest to 100 and 0c is probably okay.
    Digital thermometers are usually good for 1-2c accuracy.
    Alcohol thermometers can be pretty good, down to 1c.
    Old style mercury ones are usually bang on, just bloody dangerous.

    Original Poster Banned

    Thanks Joe.
    I've only just seen your reply.
    Butt thanks.
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