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3-39 Condar Probe vs. 3-19 Condar Probe. Test Results.

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by pen, Feb 2, 2011.

  1. charly

    charly Guest

    I'm happy with my Tempoint 12-7014 thermometer probe . Had the same prope on my pipe when I use to have my gasification boiler. Worked great. Large easy to read face. I can see the needle from across the room. Nice thing is, you can calibrate the gauge in boiling water. Best price I found was $68.95. Some places want over 90. Has a nice clip that that hangs in the 1/4 inch whole you drill thru your pipe. Then your probe slides into that hanger. Nice interference fit. Tip of the probe should be centered in your pipe.

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  2. dave11

    dave11 Minister of Fire

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    I've been thinking about getting one of those. They're made by Bacharach, who has a good rep. I believe they're still based here in Pittsburgh.

    Do you have a way to confirm their accuracy at higher temps? Above 212F, I mean. Like an IR gun?
  3. charly

    charly Guest

    No Dave, I'd be shooting an IR gun at a double wall pipe.
  4. Troutchaser

    Troutchaser New Member

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    Thanks, Pen and BGreen for going through all the trouble.
    Thats good information.
  5. Todd

    Todd Minister of Fire

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    Do they make one with a higher range than 1000? Looks similar to Teltru thermometers. What kind of temps do you see?
  6. charly

    charly Guest

    I think I might have seen one that reads higher. Have to look around. My Quad flue temps stay between 600-800 most of the time. The stove top shows 450 - 650. Sometimes I'm matching my flue gas and stove top temps. I almost think I have too good of a draft. I'd rather have a hot chimney than a massive build up of creosote. I come out of my stove with double wall with one 90 into a wall thimble, then into a masonary chimney with an insulated liner, 22ft tall. Chimney cap screen still looks perfectly clean .
  7. Todd

    Todd Minister of Fire

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    Reading through all the older posts about this and rereading the instructions they do say to insert the tip in the center of the pipe for accurate reading so if the stem is 4" long and your pipe is 6" maybe we need to pull it out an inch especially with single wall pipe? Double wall pipe is a little larger diameter and has that extra shielding so 4" is probably about right.

    I cut my old Condar probe down an inch last year but found it didn't make much difference but maybe that's because the dial was still up against the pipe collecting all that radiant heat? I do notice a lower temp when my new probe is out an inch further and it's also real close to that claim of 50% more the external temps. Too bad Wes999 didn't try this when he tested with his thermocouple.

    This still doesn't explain why the older Condar 3-19 probe reads lower unless it was calibrated different to be snug up against the pipe?
  8. pen

    pen There are some who call me...mod. Staff Member

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    The probe is meant to sit flush or else I'd say it wouldn't have included a magnet. Also, if it wasn't flush it wouldn't sit in there very well at all on single wall pipe. The probe is supposed to be "ready to go" for 6 or 8 inch pipe.

    From their website:

    I agree, for some reason they didn't consider the radiant heat of single wall pipe in their claims.

    pen
  9. Todd

    Todd Minister of Fire

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    Well I e-mailed them to ask about this, will let you know.

    That little eyelet allows you to pull it out and still be stable. I made a 1" spacer for my probe and now it's reading like their claims.

    Attached Files:

  10. pen

    pen There are some who call me...mod. Staff Member

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    The spacer looks good. Maybe they could simply include one of those to fix this problem the easiest. Although I would perfer it to sit flush.

    pen
  11. charly

    charly Guest

    Todd, I looked and only find the probe from Bacharach that reads to 1000.
  12. Todd

    Todd Minister of Fire

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    Responce from Condar. Now what to do?

    Hi Todd,



    Just this week our engineers determined that our 3-39, or FlueGard, does not give accurate readings for single-wall fluepipe. We are in the process now of updating all of our published materials that indicate otherwise. I recommend you switch to one of our magnetic surface thermometers like our ChimGard (item #3-4) which does not require drilling holes into the pipe.



    Did you purchase a FlueGard from us ?



    Regards,
  13. DanCorcoran

    DanCorcoran Minister of Fire

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    Bummer...I cut the probe to 3" when I received it last year, to read from the center of the flue. Guess I'll just have to practice up on subtracting 200.
  14. Troutchaser

    Troutchaser New Member

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    Wow.
    At least the debate is settled somewhat.
    If a single wall pipe affects the reading, I'll bet a very hot double wall can influence it as well.
  15. Peter B.

    Peter B. Feeling the Heat

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    Condar:

    "Just this week our engineers determined that our 3-39, or FlueGard, does not give accurate readings for single-wall fluepipe. We are in the process now of updating all of our published materials that indicate otherwise."

    --

    Once they're finished updating their literature, maybe they'll 'update' a probe that will read single wall flue temps accurately.

    Maybe they could call it the "3-19".

    Peter B.

    -----
  16. Todd

    Todd Minister of Fire

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    That still baffles me, why the 3-19 reads lower? They look the same except the face.
  17. begreen

    begreen Mooderator Staff Member

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    Looks can be deceiving. Subtle differences in the bimetal coil would be hard to notice. A different source for the parts might also explain the discrepancy.
  18. pen

    pen There are some who call me...mod. Staff Member

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    Well, if all goes well there will be another one to compare to shortly :)

    My wife is still shaking her head at me.

    pen
  19. Troutchaser

    Troutchaser New Member

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    My wife told me, quite rudely, that I was obsessed with the stove and temps. just this morning. I'll be glad when she goes silent and just starts giving me head shakes there pen.
    Of course, I did call home and ask for a flue temp. reading from a questionable probe. ;-)
  20. pen

    pen There are some who call me...mod. Staff Member

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    Reply from Condar:

  21. begreen

    begreen Mooderator Staff Member

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    My wife told me she was glad to have the probe thermometer back.
  22. begreen

    begreen Mooderator Staff Member

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    Hmm. No explanation of why the 3-19 is reading 200 deg cooler. Funny thing is that I chose the 3-19 over the 3-39 because I don't like garish scales on my thermometer and prefer the understated appearance of the older style. That's why I bought it over the newer style.

    FWIW, I had the feeling of talking to a brick wall when communicating with Condar and finally stopped. Ironically, I just got a very expensive color catalog mailing from them. Looks like it was designed to compete with LL Bean Home, filled with log carriers and the like. I noticed that thermometers were pushed to the back pages. It's now in the recycling bin.
  23. pen

    pen There are some who call me...mod. Staff Member

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    It will be interesting to see if the I actually get a 3-19 as I ordered, and not a 3-39. And secondly to see if it reads just as yours did.

    What's funny is it will end up taking longer to get this thermometer from a local about 120 miles from my home than it took to receive yours 2000 miles from me. Go figure.

    pen
  24. begreen

    begreen Mooderator Staff Member

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    Gotta love the USPS. It's the best.
  25. pen

    pen There are some who call me...mod. Staff Member

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    Well, nothing is ever as clear cut as I'd like it to be.

    Here's the new 3-19 I received from starbrickstoves.com.

    It does read lower than my 3-39 probe, but only 50 degrees less, not 200 less like BeGreen's did.

    So, now we have to guess whether or not components changed again even within the 3-19's? Or even w/ light/moderate use has BeGreen's lowered in temp a bit over time? Or is there this much variability/uncertainty in any probe that you can buy?

    What I find interesting is that all of the thermometers read identically below 450 degrees.

    Condar claims 4000 hours use is it for these things. That's basically 1 season! Have our thermometers changed over time and we just not notice it?

    We need someone w/ double wall pipe to do testing like I have here to compare.

    Sorry that these pics aren't as high a quality as the others. This is my wife's camera. It's 5 years newer and a few megapixles more worthless.

    pen

    [​IMG]

    [​IMG]

    pen

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