4 Channel K Type Digital Thermometer Thermocouple Sensor -200~1372°C/2501°F (Batteries Included)

I bought this to do a number of measurement and monitoring tasks, anything from diagnosing the refrigerator cooling to measuring hvac performance. I even have some uses that will require very hot measurements (300-500F). This unit seemed a bargain at the price, so I wasn't expecting much. Let's say it exceeds my expectations. I've already used it to fix the fridge.I use a combination of the sensors provided and some 3rd party high-temp sensors also purchased from Amazon. Readings between sensors and channels looks to be +/- 2F to each other at room temperature. Good enough for my needs. Nice unit!

Nice unit has a bright backlight. The thermostats that came with the unit weren't very accurate. I purchase the ones that were recommended, and they All read the same.

Purchased this to get a final read on the temperature in my oven. I had some questions on whether the oven was calibrated correctly, and the small in-oven thermometers did not answer the question. With this four-channel device I was able to measure the temperature at four locations at once and understand the differences between locations and the logic of the oven heating itself.The thermometer is surprisingly well-build - I'm a scientist and have used similar 'professional' instruments, and the only difference I see is the fact the the instruments I used in the lab came with a certificate of calibration, but I was not looking for that kind of accuracy here. (A short primer on the physics behind this: The K-type probes are made by bringing two different metals together in the junction at the tip of the wire. Because of this, the wire will generate a different voltage depending on the temperature. The output from probes is very consistent, the only variable in the readout of the system is the meter that is measuring the voltage and converting that reading into temperature scale - this is adjusted during calibration). This is one of those rare occasions that I actually recommend a product.

I was using mine to keep track of temperatures at multiple spots (using multiple thermocouples), and it seemed to work well at first, but then the display kept shutting off every 10 or 15 minutes, and I would have to walk over and turn it back on. Even though multiple probes were plugged in and the temperature was changing, it just kept turning off.I didn't see anything in the directions about it or when I Googled it. And nobody answered the question I posted. Ultimately, this made it rather useless to me, and so I ended up having to return it.

This product met my expectations (and beyond)! I needed to profile a couple of freezers that are at -80degC, so this Leaton 4 channel was perfect to measure different zones at the same time. I'm very happy, and it seems accurate if the probes are measuring close to the expected temperature...but if it's not measuring close to expected (such as -80, -75, -70C), then it is way off and I just unplug/reattach the probe that seems to be "off" (as it will read +25C or >50% from expected). Thank you.

Reads accurately if you only have one thermistor inserted. Insert two, and neither one reads correctly. I'm not even returning it. It's already in the garbage.

Error on all 4 channels: Ice water reads around 7.8C. Independently verified ice water by two different methods; thermistor and IR probe to be 0.1C. All probes, all channels/combinations behave the same way. I even tried my own type K thermocouple. I tried flipping between units; C/F/K and got equivalent results with unit conversion. Polarity verified on all four probes. Tried my own new 9V battery. If this worked as advertised it would be a nice unit for $30ish. Came with four decent quality probes and 9V battery. Battery door requires #0 phillips screw driver for single non-captive screw. Looks like everyone else had better luck. The brand I received was "XINTEST" I don't see "Leaton" anywhere on the box, unit or instructions and am not sure that that matters. No need for a 1 star rating, I think this was a fluke (no pun intended).

This is a wonderful device! Saved me hundreds of dollars. Kiln was over firing by almost 100°F . Now with my Leaton 4, I simply turn the kiln off from the accurate read out and it no longer over fires! This saved me from having to replace my kiln's computer.Below is a picture that shows how my kiln was thinking it was around a 100°F cooler than it actually was - thus would keep getting hotter and hotter and ruined my pottery.