Review on KEYNICE USB Powered Digital Thermometer with Color LCD 🌡️ Display - Highly Accurate Readings in Fahrenheit and Celsius - Black by Frank Tyrance
Works great but cannot run constantly on external battery
Bought to keep an eye on the water cooling tank for my laser cutter which it works great for. I was planning to power it with a standard lithium-ion power bank (like the kind you charge with phones, for example), but I ran into a rather interesting dilemma: the power consumption of this sensor is so low that all power supplies that I've tried turning off automatically (they are designed to stop current below a threshold to prevent parasitic current leakage), which turns off the sensor. My low-tech solution is to just turn the power on manually when I need to test the sensor (the sensor stays on for 15 seconds).
- Quality construction
- not reliable
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