Any one know of where I could find a device to measure temps up to 2500 degrees farenheit. I have had no luck finding anything. I am sure it would have to be some sort of thermocouple made out of a ceramic material. One with a digital display would be perfect. Any help is appreciated.
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Need help finding a high temp thermometer...
- Thread starter Nomoemuny
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Sando
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Harbor Freight sells a VOM that includes a type K. I bought one that looks very similar - might be the same one. Works well. I like it.
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=37772
One word of warning! The thermocoupler is flexible UNTIL it gets hot! Then the ceramic 'fabric' solidifies and becomes brittle. Had I known that I might not have broken it on the second use. It still works but is very fragile.
Steve
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=37772
One word of warning! The thermocoupler is flexible UNTIL it gets hot! Then the ceramic 'fabric' solidifies and becomes brittle. Had I known that I might not have broken it on the second use. It still works but is very fragile.
Steve
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how does that one work? (never had a Voltmeter that measured temp....hmmm....) I'd be afraid of melting the leads....
Sando
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Dan,
It comes with a thermocoupler. That's the part I was refering to that hardens up somewhere up in the 1000 degree range. So, no you don't use the voltage leads to measure temp!
BTW, thermocouplers work by generating electricity (two different metals). The heat varies the voltage. Quite a natural application of a volt meter.
Steve
It comes with a thermocoupler. That's the part I was refering to that hardens up somewhere up in the 1000 degree range. So, no you don't use the voltage leads to measure temp!
BTW, thermocouplers work by generating electricity (two different metals). The heat varies the voltage. Quite a natural application of a volt meter.
Steve
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Daniel Koster said:
Hooks up the thermocouple the same way as a temp meter would. You have banana jacks on the meter, and the leads from the thermocouple terminate through them. No leads to melt....
I woudl have to check the accuracy of the meter first. The fluke units that have this feature are very accurate, but the cheaper chinese made units are not so hot in that regard.
Doc
Sando
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Doc,
Good question on accuracy. FWIW I tested my heat treating oven has a digital Orton controller. So I tested it with this tester. The tester read about 25 degrees lower than the Orton. When I was comparing my heattreating results with the Crucible data sheets, it appears the voltmeter/thermocoupler was more accurate than the Orton.
Steve
Good question on accuracy. FWIW I tested my heat treating oven has a digital Orton controller. So I tested it with this tester. The tester read about 25 degrees lower than the Orton. When I was comparing my heattreating results with the Crucible data sheets, it appears the voltmeter/thermocoupler was more accurate than the Orton.
Steve
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Where does this go (in the forge)?
What's the best setup for it?
What's the best setup for it?
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Daniel Koster said:
The thermocouple goes in the forge, and out of the way of material. Like a top corner, and extends out into the relative center from that edge. the leads are outside the forge. The thermocouple will actually be covered by refractory material for the first couple of inches or so, and the threaded tail will extend through the wall with the leads attached.
I wish I could post pics here, but the membership is not happening right now. Soon enough I guess.
Doc
The Harbor freight one only goes to 1832 degrees. The one on ebay goes to 2000.
If your'e gonna weld you need 2350 or more.
I found one on ebay that went to 2499.
That HF one would be good for heat treating for sure. What kind of thermocouple does it come with?
Doc check the code to post a pic you can do it.
TJ
If your'e gonna weld you need 2350 or more.
I found one on ebay that went to 2499.
That HF one would be good for heat treating for sure. What kind of thermocouple does it come with?
Doc check the code to post a pic you can do it.
TJ
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Here's what I came up with. It's a controller that I bought on eBay. It's being sadly underutilized as just a pyrometer but I may have a salt pot set up one of these days. It's connected to a type K thermocouple from Omega with all copper speaker wire:
Here is a picture of the probe in my heat treating forge, the controller was reading right at 1500 degrees (and yes the isuwool is uncoated but the forge is outside and the insulation is not subject to mechanical damage, I do however intend to coat it to see if it makes the forge a tad better insulated):
This probe is inconel sheathed but will eventually burn up like probes of any kind will especially if you use it at welding temps. This unit seems to top out at 2500 degrees fahrenheit when we used it to monitor a smelter a friend of mine and I were running in an attempt to make steel from local bog iron. I believe that is a function of the upper limits of a type K probe. There really is no need to monitor welding temperatures, however in conjunction with a trained eye, a pyrometer is worh it's weight in gold for heat treating operations.
Here is a picture of the probe in my heat treating forge, the controller was reading right at 1500 degrees (and yes the isuwool is uncoated but the forge is outside and the insulation is not subject to mechanical damage, I do however intend to coat it to see if it makes the forge a tad better insulated):
This probe is inconel sheathed but will eventually burn up like probes of any kind will especially if you use it at welding temps. This unit seems to top out at 2500 degrees fahrenheit when we used it to monitor a smelter a friend of mine and I were running in an attempt to make steel from local bog iron. I believe that is a function of the upper limits of a type K probe. There really is no need to monitor welding temperatures, however in conjunction with a trained eye, a pyrometer is worh it's weight in gold for heat treating operations.
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that's what I would want mine for - heat treating.