Sper Scientific 800007 2 Channel Type K/J Thermometer, 130mm L x 56mm W x 38mm D

• 9V Battery Included
• Beaded Wire Probe
• 5 ¼ x 2 ¼ x 1¼
• 5 Year Warranty
• See all Sper Scientific thermocouple thermometers on Amazon.com: http://goo.gl/MG0fL

I have used this for well over a year and found it to be a great product. I haven't used the included probe too much, but I think it is great that they included one. I installed a higher temperature thermocouple more or less permanently in my oven, and I plug it into this unit to measure oven temperatures when I roast coffee. The included thermocouple is fairly high-temp (teflon jacket), but my oven has a hot broiler, so I bought a serious high-temp thermocouple (woven-glass jacket) elsewhere.

I use another thermocouple probe (with a T-handle) to monitor compost heap temperatures using this unit.

For some of the stuff I do, I was worried about the unit turning itself off automatically after a few minutes, but I found that this feature can be temporarily disabled, which is perfect for me.

I was worried about the battery life (since a lot of items using 9V batteries have terrible battery life), but it turns out that one battery lasted me for about a year. And this includes one or two times when I left the unit running overnight by accident. (Remember, by default, the unit turns itself off after around 10 minutes... I only had this problem because I disabled that feature.)

The only way I can think of to make this unit better would be to add data logging, or have the price come down a bit. That's why I gave it 5 stars.

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This thing works as I would expect it. Sort of expensive, but worth the money if you're planning to use it for everything.

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I purchased the Sper 800007 many years ago, and it is still going strong. It does everything as stated, and I can find no downside to the unit after years of use, other than I wish I upgraded to a RS232 version. Even though the unit is built in China (Taiwan actually), the build quality, materials, finish are all top notch, and holding up great. For example by now with most Ivory colored plastic from China, it would be yellowing by now. My unit looks as good today as it did when I received it, and I use it outdoors.

If you are looking for a good value, dual channel thermometer, with T1-T2 readings, this is a great unit.

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Used it for my kid's science project where we were measuring the surface temperature to see how efficient heat is spreading from a point source. The instrument is easy to use but I have trouble managing the two long-wire thermocouples; wished they had a more rigid support. I ended up improvise a connector to fix the two thermocouples in place. Otherwise, this instrument works great.