QooltekDigital LCD Thermometer Temperature Gauge Aquarium Thermometer with Probe for Vehicle Reptile Terrarium Fish Tank Refrigerator(Fahrenheit)

From the onset I purchased a digital thermometer from Qooltek and it arrived quickly, but the unit did not function as it was supposed to, and the instructions were "very vague" to say the least. Upon making my initial review, I received an email from "Rose" at Qooltek explaining the situation to me and that I had apparently received a non-functioning unit.Rose explained to me that the reading "Lo" means the unit is bad. She informed me that they would send me a brand new thermometer. The following is my update on said thermometer:"Product update. Upon posting initial review, I was contacted by "Rose" from Qooltek and she told me that I had received a defective thermometer and that they would make it right by sending me out a new unit. I was impressed that companies DO actually read their customer reviews of products. Rose explained to me via email that if digital readout was depicting Lo....then the unit was defective. ""Anyway, Rose did send a brand new unit out and I am happy to say that it arrived intact and it works quite well. I use this thermometer to check water temperature in pex line coming from wood boiler outside into my basement.""My initial review has been upgraded to "I highly recommend this company and their products". Instructions can be found on their website and to be honest, not much to read except how to change from Fahrenheit to Celsius. Rose explained to me that the probe head does NOT have to be inserted dead on...it can lie next to what ever it is you are checking on temp. Enough babbling. Qooltek made good on their product and Rose was indeed a pleasure to chat with and she will make whatever issues you had...right. I highly recommend Qooltek."Upon receiving the new thermometer, my STAR rating goes to a HIGH FIVE!

Love this little temperature sensor - was exactly what I needed to monitor the (external) temperatures on my upgraded Sur Ron battery! Where I live, it gets very cold - and batteries tend to lose capacity in cold temperatures. So... I used aluminum tape to stick usb-powered heating pads onto the outside of the battery, stuck the temperature sensor in on a separate part - a little bit away from the heating pads - and then insulated the whole thing with foam. My battery's external temperature went from being around 32 degrees to around 58 degrees! Meaning my range went from around 60% back up to around probably 95%! :) And this little sensor allowed me to monitor it carefully - even while riding around.I just stuck the digital part into my phone holder. The LCD also seems to do surprisingly well in cold temperatures - where most LCD's start to fade and update slow in cold temps.It also seems to match pretty closely to what my inferred thermometer tells me (tested before I insulated everything).5 stars all the way.

Good probably for an aquarium, but was not precise enough for my needs.

Bought two. Seem accurate when compared to any other thermometer. One started acting up, and the Seller jumped all over it and had a new one at my door in just a few days. I see how they are built and I saw they are not hardy. If you treat it well, it will provide you a long service life. If you yank the cable, are dropping, or storing it tossed about in a tool box; it probably will not be up to the rough treatment. I keep them in my refrigerators, with the probe in the fridge, and the reader mounted in the top hinge with two sided tape. I would definitely get again. Seller was great.

Once I put the probe in the water it stopped working. Temperature was reading in the 80F degrees, WAY OFF