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PID thermometer

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by realstihl, Mar 5, 2013.

  1. realstihl

    realstihl Feeling the Heat

    Joined:
    Dec 4, 2007
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    eastern kansas
    I bought a PID to monitor stove top temperature and was surprised at the temp differences between IR, k-probe, and magnetic thermometers. At first I thought the new PID was at fault but confirmed it was right with the Fluke meter. Example: At 300 deg on PID the magnetic stove top was around 400deg and one of my IR's read 300 and the other read about 400. So I went and got wifes digital probe and confirmed it was 300 deg. At a stove top temp of 400, same thing. Magnetic was 100 deg higher. At what I thought was 500 deg is really only 400 and that's where my stove seems to start working well. Hard to believe some people are running their stoves at 700+ deg. Now that's hot.

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  2. TradEddie

    TradEddie Minister of Fire

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    SE PA
    While the Fluke meter is likely to be the most accurate and rugged of those measurements, bear in mind that thermocouple accuracy can be significantly affected by thermal gradients at any junctions and especially within the handheld unit itself, so keep the handheld far away from the stove, and allow it to acclimate to the room. Bringing a fluke from a cold workshop to a hot stove room will give you bad readings even if the probe has stabilized. Not likely to be 100 degrees off unless there's a serious problem however. I'm surprised the two IRs gave such different readings, was one near the limit of its range?

    TE
  3. realstihl

    realstihl Feeling the Heat

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    Thank's TE. The fluke was in a stable environment. The more expensive IR had the biggest difference. The cheapo was close within 20deg of the Fluke and PID.
  4. mellow

    mellow Resident Stove Connoisseur

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    I left my IR gun by the stove the other day and went to use it and couldn't figure out why it was 40 degrees off, it was warm to the touch and just that little bit of change really threw it off. Just a thought.
  5. Machria

    Machria Minister of Fire

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    HUH? :eek:

    Relying on a "wifes" tool can be very hazardous to ones health! Carefull!

    :)
  6. realstihl

    realstihl Feeling the Heat

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    Somehow I knew this would come up.:eek:
  7. realstihl

    realstihl Feeling the Heat

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    Here's some pics, maybe. [​IMG][​IMG][​IMG][​IMG]
  8. realstihl

    realstihl Feeling the Heat

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    eastern kansas
    Darn new computer. Hope you all can at least open these. My next challenge maybe to control the draft with PID. I'd like to figure out how to modulate draft instead of just open and close it.
  9. Machria

    Machria Minister of Fire

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    The blaze king already has that.
  10. Machria

    Machria Minister of Fire

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  11. realstihl

    realstihl Feeling the Heat

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    eastern kansas
    Sorry, Fixed now.
  12. Machria

    Machria Minister of Fire

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    What stove is that? Looks like an enerzone....?
  13. realstihl

    realstihl Feeling the Heat

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    It's a Lexington Forge which is now Vermont Castings. It' on it's third year. Needs a good dusting.
  14. scooby074

    scooby074 Feeling the Heat

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    My IR reads about 20*C higher than my PID Thermocouple. on the stove top.

    My Food grade probe thermometer reads the same as the TC on stove top. It also reads the same in a pot of boiling water.

    It was a bit of a surprise to say the least but I tend to think that the PID and the food probe are correct and the IR is reading wrong.
  15. HotCoals

    HotCoals Minister of Fire

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    Yeah but it's lazy..but does work some.

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