Maluokasa DC 4-28V 0.56 Inch Red -50℃~125℃ Dual Digital Thermometer with 2 Waterproof NTC Probe,Waterproof LED Display Waterproof Temperature Sensor for Aquarium Refrigerator Water Temperature Gauge

I have been looking for something like this for a while. Easy cheap and good quality. I plan to use this and a few others to monitor my battery pack in my shed. This thermometer is great, water proof probs, good quality, huge voltage range, and a very fast response. Once I have these installed I will update.

Works correctly. Have it mounted so I can keep an eye on my 3D printer enclosure temperature. Powered off the 24V power supply of the printer.