weideer Digital Thermometer Dual LED Display Fahrenheit to Centigrade Adjustable DC 4-28V -67~+248℉/-55～+120℃ High Accuracy Temperature Gauge Sensor with 2 Waterproof NTC Probes K-017

Good item as approved and sent it in good condition, and a good box and packaging

They're not forthcoming with instructions on how to adjust/calibrated each channel but it involves holding down the micro pushbutton on the PCB until you reach the menu. To reach the menu, hold down the button for 2~3 seconds...•Short clicks scroll thru the parameter selection, press and hold to adjust the parameter•When the parameter is being adjusted by holding the button down, it will increment. Release the button for a second and hold it down again to decrement.It's a little confusing but it really does work! The method described is something you really have to do yourself - until you 'get it'To make life easier, I desoldered the surface mount pushbutton and added a normally open pushbutton on a 8" length of wire...I put the works (batteries, switch & display in an appropriate enclosure)I fabricated a Subcooling & Superheat measurement instrument from this device...the RED colored display measures/displays the temperature of the high pressure/liquid line. The BLUE colored display measures/displays the temperature of the low pressure/suction line.By use of a custom made circular split bushing which replaces the jaws of a plastic spring clamp (to hold the thermistors on each of the aforementioned lines) I'm able to calculate subcooling & superheat parameters whilst adding refrigerant to an HVAC system.Powered by 2x 18650 batteries - this thing works great. It's accurate on a 2 point calibration - if you take the time to do it.I think it's an excellent gauge. Great price point - love the 2 different colors on the display.This is the way to get a good thermometer gauge for a great price. I'm going to purchase several more since these work so well.Two thumbs up!

These are not what I expected. They are very very small. Too small for my panel. I will update when I test it out. Just not sure if I will ever use it.

I bought two of these, one for each of my two aquariums. I temporarily installed them and put one probe in the left side of the tank the other probe in the right side. I let them sit for about three or four weeks and the temperatures for each probe were usually within a 10th of a degree with of each other so I thought they would be just fine. I then took the time to chisel out a hole in the cabinet to recess the gauge, so it would look nice and reinstalled the probes on each end of the tank. all is good for about two months. Then one probe started getting about 5/10 of a degree off and within three months of that the temperature is varied at least 20° from each other, just being inside the same aquarium tank one on the left side one on the right side. I know they can be programmed and be reset and recalibrated manually. But a 20° variance that needs correcting every 3 months is unacceptable. I wouldn’t recommend these to anyone that needs to keep track of the temperature of a fish tank.

I purchased this Item as an Install into the Dash of one of my Trucks which does not have an outside Temp gauge.I really like everything about it, It has a vary small compact footprint. The Dual Display is bright and easy to view during the day and not terribly bright at night, If the Units Brightness is too intense for a person, you could cut a Gel Filter used in Lighting to darken it, cut to fit the face.The internal Menus are fairly straight forward once you navigate around and get a feel for them. I Recommend Saving the image from Amazon, as there's no Documentation that comes with it. Each probe is capable of being Calibrated. I tested their Reading against a Reference i have and they were well within a degree of my Reference. For the Price of them its a decent buy.On the Mounting end of things, this Display was designed as a Panel Mount, so your going to want to create an enclosure or have a place and cutout ready for it.So far i have to give it a 5 Star Rating across the board, I will update over time for and long term failures on it.(Edit: Added Content and Picture) The LCD Segments look weird because of the Camera Refresh Rate. Its only an Artifact, LCD is Clear and Bright. The Temp Sensors Seem to be Stable once i got them Calibrated I had to extend the wire lead to the outside temp probe, which was no issue. So far I'm liking it especially and for the money!)