Thermocouple Thermometer, RISEPRO 4 Channel K Type Digital Thermometer Thermocouple -200~1372°C/2501°F Sensor HT-9815

I am a Deputy Fire Chief, and purchased this multi-channel thermocouple thermometer to use in a fire training event. We constructed a small model of a building to demonstrate fire behavior and ventilation impacts. The “building” has 4 “rooms” and an attic. The lead instructor thought it would be neat to be able to measure the temperature in each compartment as part of the demonstration. A brief search on Amazon led us to this item. The reviews were decent, though several indicated an innaccuracy of 10-15F. With our use, and the temperatures we would be measuring, we decided that was perfectly acceptable. For the less than $40 price (in March of 2023), it seemed worth the try, and the return policies minimized the risk. Overall, I am very impressed, and so were the firefighters. Having the simultaneous temperature for all 4 compartments added a significant piece of understanding to the demonstration. We reached temperatures of over 1,500F during the experiment, and the thermocouple leads survived. I did not expect that at all. The unit is simple and easy to use, setup was quick, the tester is rugged, ergonomic and durable, the leads clearly hold up to high temperatures, and the display is clear. My only complaint is that the leads are pretty short, around 3 feet or so. We definitely could have used 2-3 times that. I don’t recall the lead length being clearly described in the listing, or I would have likely tried to get longer ones. The good news is if you want longer, higher temp ratings, or just replacements, there are plenty of other leads available. Certainly not a precise scientific instrument, it doesn’t meet any real calibration standards, but in our experience it worked very well for our amateur application. I’ve included photos that show temperature readings at different times in the demonstration, the thermocouples post-demo, and the burn box we used.

A really nice instrument for the modest price. Calibration is not traceable to NIST or any other standard I am aware of. It works fine for candy making, baking, brewing, smoking, grilling, incubators, and refrigerant measurements. Which are the uses I need it for. If you are trying to prove net energy release from tabletop cold fusion, maybe get something calibrated to a recognized standard. Comes with four basic type "K" bare bead thermocouples. The supplied thermocouples have polymer insulation, so not great for much above 230 degrees F. for extended periods. The supplied thermocouples do work fine for refrigerant line measurements. I bought inexpensive bare bead thermocouples with ceramic insulation, that easily withstand my 550 degree bread oven. A probe with a pointed stainless steel tube is nice for grilling, and similar baking, brewing, type purposes where you insert it. One problem will miniature type K, thermocouple connectors (The little 2-pin yellow plugs) is they tend to get lose with use, especially if you accidentally force one into the receptacle backwards. Nice handy instrument, with a quality look and feel.

Wow! 860 degrees Fahrenheit while using the self-cleaning cycle of our Frigidaire Professional gas range. (Per an undocumented search on Google, the cleaning cycle should max out at 900 degrees. Note: to do this test, I used a separately purchased $10, K-type thermocouple with alligator clips .) I'm giving this 4 stars because the instructions lack sufficient details to be helpful, the readings take time to stabilize, and are somewhat inconsistent. But, for the price, and the results below, I am happy with my purchase. The 4 included thermocouples appear able to read a normal oven of say 350 degrees F, or go right into the freezer. They show that water boils at about 202 degrees F in Denver, but ice water is right around 32F. While the combination cannot compete with the likes of Fluke meters, for a quick check on our outdoor gas grill, or indoor oven, this appears to be respectable and useful. This addition to the digital thermometer permits clipping to the interior of the oven or gas grill and provides a higher maximum temperature exposure. The other standard leads confirmed that the adjacent cabinets remained safely cool if the doors were kept open. I have discovered that the reading appears to be influenced by several factors including: ambient temperature of the total cable, total time that the thermometer has been "on", and the effect of cycling the thermometer on and off.

I'm very pleased with product especially at this price point. It does exactly what it say sit does. Some people have complained about measurement accuracy, but the device meets its published specs (roughly +/- 8 F). So, don't use this at room temperature. But, I'm using it to check the temperature of a pottery kiln at 1950 F, so 8 F is lost in the noise for me. The readings are quite "instantaneous" so they are a bit noisy; it would be nice to have the ability to do some smoothing or a short moving average. The probe wires can get brittle and break, so treat them carefully. And, finally, the probes are polarized and it is almost impossible to find the markings on the plugs; I just plug a probe in and if it appears wrong at room temperature (reading 35 F when it's 65 F for example), I unplug the probe, reverse polarity and try again. It's pretty obvious when the polarity is reversed. Otherwise, it's a very nice tool and I expect to get a lot of use from it.

In several reviews of this product, people are complaining about poor accuracy. What people fail to realize is that accuracy is a function of the thermocouple you are using, and NOT the thermocouple reader. All a thermocouple reader does is convert the voltage across the thermocouple to a temperature reading. If the thermocouple isn't producing an accurate voltage, then you are going to get an inaccurate temperature reading. If you want highly accurate results, put your money into a high quality thermocouple probe. But using a cheap reader like this is just fine. In fact, you can make your own highly accurate thermocouple reader with an Arduino and a few parts. The magic sauce for accuracy is the actual probe. You can turn off the auto-power-off function of this reader, which is very convenient. This is a decent quality four channel reader that supports several different probe types at a reasonable cost. I've been using mine for a bit over a month now with zero complaints.

Do not bother with this, there is zero precision and will give wildly different, inconsistent readings every time. Using the probe and connecting to different channels will result in temperature readings that were wildly different each time. Disconnecting the probe and reconnecting it to the same channel, while in contact with the same constant heat source would also keep changing the temperature up or down each time. There is no consistency or accuracy with this. You will never get an accurate temperature reading to be useful for anything. I was hoping to use the temperature probes to get a simultaneous reading of a hot object's surface, vs the reading of the ambient air temperature, so that I could monitor the delta as cooling was applied. This device's inaccuracy made sure that it would never be possible and every result would be meaningless. This is not an instrument, it is a gimmick device that can barely perform with It is advertised as +/-1C accuracy at >100C and +/-2C accuracy at <100C. This thing is more like +/- 4C, or +/-10F, which is too huge of an error margin to be useful for anyone.

These k type temperature probes don't agree very well. The first time I turned them on they were ok, but soon after that a hot component that was over 120F read at 66F with a room temperature of 81F. It seems like the temperature probes get in moods. Sometimes some of them work right, and sometimes not. These probes appear not to be able to read extremely cold temperatures, if I'm correct about what ones they are. You may have to buy lots of these and mix and match them to get accurate results. Otherwise the unit is great, and the screen is easy to read, it doesn't stay on very long unless you keep poking buttons. Maybe some more expensive K type temperature probes would work better.

Does the job. The cables are not so convenient but the sensors are accurate

Excelente producto

I have two sensors together. They sense different temps. Using a probe that is water proof the water freezes at 0°C fine. The same water boils at 92 on one probe and 98 on the other. Rolling boil shoild be 100° Mash temp for beer at 152 using a calibrated thermometer reads 152. This junk reads 150 and 146 on two probes litterallu tied together If I turn it off for a minute but keep probes in place at a stable temp when you turn it back on they read more than 30°C out then takes 15 minutes to get close but never gets to the actual temp. There seems to be no means to calibrate either

Not happy on this product, second time trying, new batteries but for some reason these numbers are right off T1 says 7.3°C but it’s in -10°C solution and I know it’s -10 from the PLC T4 is in a hotter solution my PLc says it’s 57.2°C not 43.7°C, Not happy please email me this is unacceptable!!