Hot or cold?

8 Responses to Hot or cold?

1. R. Brown says:

   February 7, 2016 at 1:49 am

   Oleg;

   Something more likely in the hand held infrared temper measurement devices.

   Like this perhaps?

   http://www.lightinthebox.com/gm320-gun-shaped-infrared-themometer_p1302572.html?currency=USD&litb_from=bing_shopping&utm_source=bingshopping&utm_medium=cpc&utm_campaign=bingshopping

   C-90
2. Kelly Harbeson says:

   February 7, 2016 at 6:56 am

   Home Depot sells IR thermometers for a reasonable price. Look it up and see if it meets your needs
3. Tom says:

   February 7, 2016 at 9:11 am

   Infrared thermometers are deceptively difficult to use correctly, especially on a small, highly rounded surface like a barrel. You also have to know the correct emissivity for the surface you’re measuring (stainless steel, blued steel, parkerizing, and paint will all be different). If you can attach a temporary device directly to the barrel, a contact sensor like a thermocouple or thermistor would be much better. Some cheap digital multimeters can read thermocouples, and you can get both at industrial supply stores. Attachment could be via screw clamps with some kind of heat-resistant, anti-scratch lining.
4. Gerald says:

   February 7, 2016 at 10:09 am

   These work great, but are a bit pricey. They have open box sales all the time. http://thermoworks.com/products/thermapen/
5. John S says:

   February 7, 2016 at 2:53 pm

   Constant monitoring, or stop-and-measure?

   Any digital cooking thermometer is that accurate, and the probes will fit into a barrel.
   • John S says:

     February 7, 2016 at 2:54 pm

     … but might not have the upper range you need.
6. Paul Koning says:

   February 8, 2016 at 9:40 am

   I have a low cost digital multimeter (“DMM”) that includes temperature measurement among its functions. It uses a thermocouple, which is nothing more than a skinny pair of wires, with the ends connected together by a small weld. You touch that end against what you want to measure and you quickly get the answer. Many thermocouple probe shapes are available; one common kind has the tip attached to an attachment pad, which might be adhesive. Or you might have skinny tubular probes (sometimes pointy to poke into the item you’re measuring). But the plain wire kind is inexpensive and often works well.
   Thermocouples come in various types, which refers to the metals involved. Most common seems to be the K type, which by convention uses a yellow plug. Those are good from way below zero to somewhere around 1000 degrees if not more.
7. Eric Wilner says:

   February 8, 2016 at 12:18 pm

   Ditto the suggestion of a K-type thermocouple. Not only do many multimeters have a thermocouple feature (generally for type K), but there are some amazingly cheap single-purpose pocket-sized thermocouple thermometers on Amazon.
   For attachment, I tend to use a thermally-conductive adhesive (Loctite 384), but I’m generally not worried about the finish of the things whose temperature I’m checking. Some kind of clamping arrangement and non-adhesive thermal coupling material (heat sink grease, thermal tape, etc.) might be more appropriate.

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