KEYNICE Digital Thermometer, Aquarium Thermometer, Digital Temperature Gauge, Temperature Monitor with Sensor, USB Power Supply, ℉ and ℃ Switchable, LCD Display, USB Thermometer Indoor Outdoor

I installed this on my motorcycle so I can know the ambient temperature. The display is easy to read in all lighting conditions except when the sun is shining directly on it, so choose a mounting location accordingly. Also, the sensor has a very quick response time. This makes finding a suitable mounting location for it important. So far I haven't found the ideal location; when I come to a stop, heat from the engine causes the displayed temperature to slowly rise. Once I start moving and ambient air is once again flowing over the sensor the displayed temperature drops back to the correct value. The 3 foot sensor cable makes it pretty easy to try different mounting locations. For power I just cut off the USB plug and wired the power cord directly to a switched 12V wire on the bike, so the thermometer is powered only when the bike's ignition is on. I've mounted the display unit in a location that is not protected from rain. I've not been riding in the rain since installing it so I don't know how well it will do. Once I have some wet weather experience with it I'll update this review. Update 2025-07-14: After a few years, I'm still satisfied overall with this. I found the best place for the sensor is down on the fork slider inside the front fender. This prevents engine heat from reaching it, and gives me a fairly accurate reading of the temperature near the road, which is what I really want to know. As for weather resistance, that is this unit's weakness. After I've parked or ridden in moderate rain, the display starts showing 888. After it dries out, it starts working again.

PROS: o Inexpensive o Unique graphical display to see relative temperature at a glance o Can display in Fahrenheit or Centigrade o USB powered, no batteries to run down/replace CONS: None for me Wanted a small, easy to read digital thermometer with wired probe to use in fridge and/or possibly a warming box I have been using to reliquify honey and will likely use to proof dough. This will work very nicely for those purposes. I will admit that the graphical scale really adds nothing to the readability or accuracy of the thermometer, but it does give it more "eye appeal" IMHO. One suggestion: If you wish to change the unit from C to F, you have to remove a jumper on the back of the case; it is a VERY tiny jumper and the first thing that one wonders is, "How do I keep track of this jumper in case I ever want it?". I used an old trick that we used "back in the day" when configuring jumpers on PCBs: Turn the jumper perpendicular to its original orientation and plug one side of it back onto JUST ONE of the two pins that it originally connected. Viola, you have a handy way to keep the jumper right with the unit!

Works well enough for air temperature, but is really good in liquids including water and oil as it is waterproof.

Replaced the old thermometer in my YongHeng compressor because it was broken. The old one was with batteries, that one here is powered via USB. Not a big deal since I have a power outlet near to the compressor with integrated USB ports. It temp measured seems to be correct, the probe fits perfectly in the cylinder head of the compressor. For my use the probe cable is way too long. I do like that it shows the temp range with green, yellow, red which also matches the operating ranges of my compressor. You can switch between Fahrenheit and Celsius via a jumper on the backside. I gave 1 star less because the display is not good to read from a 45degree angle (the lower the angle the more faint the reading gets). Reading the display from 90degree angle it’s crystal clear.

I use this for my car's outside air temperature gage (the car doesn't have an OEM one). I used lamp cord to extend the sensor wire so I could get the sensor to the front of the car. It's a sensitive thermometer, so initially I would get major fluctuations (10°F or more) sitting at stop lights when heat would build up under the car. So I potted the sensor inside a short piece of thick-walled stainless steel tube with silicone, and this keeps the temperatures much more stable (2°F). I have had this installed now for nearly 4 years with no issues. I initially did an ice-bath test to measure it's accuracy, and it was within a degree of expected. I power it with a USB adapter in my cigarette lighter plug, and it's attached with Velcro tape to the dash (photos).

The blue screen color perfectly matches the look of the blue screens in my honda. I cut a hole in the dash and mounted permently and it looks like it came from the factory. It polls temperture changes very fast. Highly recommend.

The display is very bright and easily read. The temp range is a bit broad for automobile cabin use, but could be very useful for tracking under hood temps. The sensor cord is a bit long for my specific needs but I suppose that makes it more versatile for other needs. It comes set to Celsius, you need to remove the back jumper to get the Fahrenheit scale. Another useful item to go with it would be some 1" Velcro tape to mount it.

Works great it would have been nice to have some type of mounting bracket but I got creative.

I love it the sensor was the perfect size and very convenient for my brine shrip hatchery. The tempreture is easy to read and I love that it plugs into USB. It works perfectly for what I needed.