infrared thermometer?

Discussion in 'B&W: Film, Paper, Chemistry' started by Poohblah, Sep 24, 2008.

  1. Poohblah

    Poohblah Member

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    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. Lee L

    Lee L Member

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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. bobwysiwyg

    bobwysiwyg Subscriber

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    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.
     
  4. Martin Aislabie

    Martin Aislabie Subscriber

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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. Poohblah

    Poohblah Member

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    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. amuderick

    amuderick Member

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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. Photo Engineer

    Photo Engineer Subscriber

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    An immersion thermometer is more accurate.

    PE
     
  8. Martin Aislabie

    Martin Aislabie Subscriber

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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