Digital Thermocouple Thermometer HT-9815 4-Channels K-Type Thermocouples 4 Measurement Mode with LCD Screen Inserted Probe Sensor Battery Included Conversion Digital Thermometers

As my previous review, it is amazing! (no misoelling intended) All 4 channels are within .05 F. An ice bath calibration was within 1 F degree. At that price it beats my logging thermometer for accuracy. Nice design, acceptable thermocouples, and handy case. Go get one!

Very nice, well made, low cost, works. I hooked 4 thermocouples to my heat pump refrigerant lines and the cold air return and one outside to monitor performance. Just push a button and see all 4 temperatures at once. Had to buy longer thermocouples. I don't know battery life since it is only on when I check it.

Had it for about 6 months now, used daily. It still turns on so that's something. Now for my review from experience in the field using it. First week, noticed that when plugging in a second K-type clamp therm couple into it, it would significantly cut both readings by over 10 degrees. So figured I'd stick with using only one even though this meter has 4 inserts. Thought that would justify the higher price if it worked...I was wrong. Kept using it because even though it would only give somewhat close to true temp readings using Fieldpiece clamp, it was better than connecting the clamp through fluke adapter into a fluke multi meter for few months. Seems straight k type reads better without the adapter into the normal power probes of any multimeter capable of reading temperature. So I settled for this compromise and continued to use it. Little by little the temperature reading accuracy got worse. From a few degrees off to now over 10 degrees off on hotter than 80 degrees and 12 on lower than 60. I tested it against other known accurate tools along the way from the beginning and now at the end when I started getting very weird readings. If you work in a field with this temp range; single degrees matter. Should have returned when I discovered two probes can not be used at the same time, and neither can 3 or all 4, I've tried it. They almost cancel themselves out no matter if one is in hot area and and another in cold, they seem to change the readings so that they move closer together by double digit measures. So forget the daydream of having 4 probes working on the same device and seeing them all simultaneously, it just doesn't work that way as much as I wish it did. I'm now biting the bullet and getting a fieldpiece. This thing will just eat your money and disappoint you even if its not dead after 6 months. Being able to trust the accuracy is worth the 2.5x price of this thing. Buy once cry once got me again. Just get the good one even if you only use it a few times a year. You'll have peace of mind.

Hard to beat for the price. I used longer thermocouple probes for my application as the ones that came with are short. All 4 channels were within a half of degree from each other. Would buy again if needed.

The tool itself has a nice look to it and is easy to use good for the money.