Proster Dual-Channel Thermocouple Thermometer K/J/T/E/R/S/N Type w/2 Probes

When I first examined, then tested, this instrument I was happily surprised at the quality and accuracy. I originally bought it as a "Sacrifice" device- to be used in rough conditions. Now, I'll keep it for more civilized environments! ACCURACY- Thermocouple thermometers are notorious for being inaccurate at either the low or high end of their range. The included probes are rated for (-) 50 to (+) 300 C. (The actual instrument has a much wider range.) It was tested against two NIST mercury thermometers. Testing near the low end yielded zero error. Warming to 0-C also gave exact readings. Testing at a semi-middle temperature of (+) 20 C showed 0.5 degree error on one thermocouple and zero error on the other. Swapping probes showed it is the thermocouple, not the instrument. Testing near the high end showed some minimal wandering of 0.5 degree. But it wandered +/- the actual temperature. Using other probes, such as other Type-K and some Type J, T & e showed similar excellent results. Testing Note- If you decide to test with boiling water, there are some things to keep in mind: a) Water boils at different temperatures at different altitudes AND the day's barometric pressure will also change the boiling point. Pressurized buildings, such as large office towers, will also change the boiling point. At my shop's altitude on a 760 mm HG (29.9 inches Hg) day, water boils at 99-C. (210.3 degrees F) b) Keep the probe away from the walls & bottom of the container and be sure to keep out of the bubble stream. Testing with an ice bath is not as sensitive to atmospheric or altitude changes. Just be sure to keep off the actual, solid ice and in the water. Even my high-dollar instruments have some variance in accuracy- some more than this Proster. If you need more accuracy, an analog mercury or alcohol thermometer- and a barometer & chart- will be essential. TECH SUPPORT- Although this instrument is very intuitive to use, I had a couple of questions of a "geek" nature. Belle from Proster answered quickly and and explained well. She was also kind enough to send me a digital copy of the owner's manual when I explained that my vision prevented me from reading the printed manual. (Yep- You get an actual printed manual. Who else does that? Nobody!) EASY OF USE & BUILD QUALITY- The buttons are huge, so even I can read them. They have legible markings. The screen is also very large. The case looks sturdy, although I don't plan on testing it's strength! Even the box it came in is heavy-duty. Without reading the manual, it is easy to figure out what each button accomplishes. The included batteries (Included batteries = A nice bonus) have lasted over 20 hours so far and are still going strong. WARRANTY- The manual says it has an 18 month warranty. Cool, huh? For something that cost 25.00 USD, that is surprisingly long. (And I understand from others that Proster does honor their warranties.) Personally, I bought it with a credit card that gives an additional 2 years. So now I have 3-1/2 years warranty for a $25.00 device. SUGGESTIONS- It would be great if the auto-time-off could be adjustable. It is either 1 minute or always on. A back-light timer adjustment would be helpful. Mine times out in 4 seconds. (But if it could be longer, I'd complain about short battery life...) WOULD I BUY IT AGAIN? Yes- For certain. I like it so much that I upgraded it from "harsh conditions use" to "be nice to it use". And, I'll even put a screen protector on the display. Actually, I plan on purchasing some more for myself and friends. NO I DONT... I don't work for Proster, nor do I know anyone there. I don't work for amazon, either. I'm just an end user with much temperature measurement experience and education, so I wanted to post an un-biased review of performance, along with my non-scientific opinions about ease-of-use, warranty & stuff like that. Thank you for taking the time to read my overly long review. I hope it helps you decide if this instrument is correct for your projects!

I'm very satisfied with this product. It works well. Its accuracy compares well against my other meters. The buttons feel great — with adequate travel and a real click! There are no weird modes invoked by weird sequences of long presses and multi-clicks, so operation is very straightforward. The display is large and clear, and when the backlight is on is adequately bright. The battery compartment has a spring clip (which is easy to use, not a screw (which I hate) holding it closed. It's comfortable to hold. It's attractive, and the buttons are easy to read. And, for a useful piece of test equipment it's really cheap!

I was too cheap when I bought my Fluke multimeter to get the version that supported thermocouples last year and found myself needing something reasonably accurate. Did not need super precision, logging, or an accompanying phone app so the Proster seemed to fit the bill. The user interface is logical and the display is legible. Temp accuracy is within the promised spec and the interface electronics provide good tracking between thermocouples. I do have a couple issues, however. The instructions state that you can disable auto shutdown by pressing/holding the Hold button. Never got this to work and was important to me since I wanted the AVG function to integrate over longer periods. Also, one of the thermocouples appear to have a bad tip weld since initial testing showed widely varying readings when the cable was moved. No issues if you're careful and keep the cable still but it's still a defect that I've never seen in higher quality products I used to used. All in all, reasonably happy with the product given the price. If I saw the two issues on higher end units, they would get returned.

Used it to monitor edge and center temperature of a solder reflow hot plate. I don't have a way to check accuracy, but the numbers were reasonable. Glad that it automatically turns off after a minute or so.

Sent this back because it was 10 degrees off . Not worth even 2 cents if it reads 10 to 12 degrees off . The old you get what you pay for . Save your money and add about 80 bucks for another brand on here that you can calibrate and get proper readings . My order was just placed for the Fieldpiece ST4 here on Amazon . Save yourself some grief and time and maybe the cost of whatever you are working on with the correct readings .

You can only use this with the thermocouples that come with the device because the thermocouple terminals at the device are not normal. I had to breakdown the device in order to connect it to my own K type thermocouple. Additionally, it keeps turning off after a few minutes and you’ve to keep turning it back on which is annoying while you’re running your machine. Otherwise it’s accurate and worked for my application

I use it for checking the temperature of my art wood burning tips. Very quick response time. I checked its accuracy with boiling water. Right on the money!

Works perfectly for my bullet casting, allowing me to have one reading for the lead in the pot and another to indicate what temperature my mould is. The only drawback is I wish there was an option to purchase without the probes as they did not work at all for my application, however both of the replacement probes I purchased work perfectly with no problems at all.

Il termometro fa quel che deve per ora le sonde fanno schifo…

I find the accuracy pretty close to a fluke brand thermocouple. I use this for AC vent readings which is pretty helpful. Just be careful not to drop it. it feels like a brittle plastic toy however, it does job and thats what matters.

Perfect

Funciona bien , lástima que solamente acepta termopares tipo "K".

This thermometer is good at this price point, obviously not designed for professional use but quite adequate for occasional temperature monitoring. I chose this particular one because of its dual display and the averaging function. Most important question is how accurate? Firstly I had already purchased a good quality clamp which is the most important accessory needed for most applications. Compared with a very accurate professional meter there is an approximate 0.3D over reading which for the hot water application 6O.Degrees C. I was monitoring isn’t a problem. If you need to monitor lower temperatures obviously the slight inaccuracy is important. Overall I’m satisfied. I notice that proster isn’t a manufacturer just a company that rebrands products, I mention this because if you look carefully on Amazon a similar item coloured Red is also on sale at a lower price, but it could be an entirely different unit which may perform differently.