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  1. #1
    Poohblah's Avatar
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    infrared thermometer?

    sorry if this is a dumb question, but i have a light-duty IR thermometer and i was wondering if this would be safe and accurate for use on b/w chemicals... i'm not sure since i'm not wise in the ways of chemistry, or even how this thermometer works... i would like to avoid buying a new thermometer.

  2. #2
    Lee L's Avatar
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    I have one that I've been using lately, from Harbor Freight Tools, recommended in another APUG thread. It's great for measuring the wash water I store, and allowed me to catch some upward drifting temps in my small rollfilm developing tanks during development. It agrees closely with my other thermometers and is plenty accurate for B&W work in my experience.

    In what way are you anticipating that it would be unsafe to use for B&W chemicals?

    Lee

  3. #3
    bobwysiwyg's Avatar
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    Quote Originally Posted by Lee L View Post
    I have one that I've been using lately, from Harbor Freight Tools, recommended in another APUG thread. It's great for measuring the wash water I store, and allowed me to catch some upward drifting temps in my small rollfilm developing tanks during development. It agrees closely with my other thermometers and is plenty accurate for B&W work in my experience.

    In what way are you anticipating that it would be unsafe to use for B&W chemicals?

    Lee
    I'm guessing the IR thermometer I have from Harbor Freight is the same one, around $20 as I recall. Very accurate, almost instantaneous. I use it to check the chem temps and wash water temps for each session.
    WYSIWYG - At least that's my goal.

    Portfolio-http://apug.org/forums/portfolios.php?u=25518

  4. #4
    Martin Aislabie's Avatar
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    Infrareds only read surface temps

    Fine for moving liquids - not so good for static (like dev in a shallow tray)

    Martin

  5. #5
    Poohblah's Avatar
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    Quote Originally Posted by Martin Aislabie View Post
    Infrareds only read surface temps

    Fine for moving liquids - not so good for static (like dev in a shallow tray)

    Martin
    thank you, i just wanted to make sure that the IR light didn't excite the atoms or break any molecular bonds or anything crazy like that.

  6. #6

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    Your IR thermometer is a passive device. It sees infrared, it doesn't output any kind if visible or invisible radiation.

  7. #7
    Photo Engineer's Avatar
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    An immersion thermometer is more accurate.

    PE

  8. #8
    Martin Aislabie's Avatar
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    I still trust Mercury in Glass thermometers over anything else

    I have yet to find anything more accurate over their narrow working range (which comfortably includes photogrphic processes)

    Martin



 

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