I was impressed with these thermometers, two sensors per unit. A day later I ordered a second one. Use them to collect data on a test air conditioner I'm designing for my RV. With these two devices, four sensors in total, I am confident that I have obtained accurate reproducible data that has helped me understand my system. Response time is fast, and when not testing, all four sensors register the same temperature to within tenths of a degree. I didn't think the instructions were badly written. The problem is that these devices can and are highly configurable with signaling. That alone gives him a lot to digest. If I needed all that, I would slowly read all the details. Thankfully, all I needed was a simple temperature reading and it was up and running right away. When it's all done and the AC is installed and on its way, I'll read all about the alarms to get audible alerts if my creation is misbehaving, and these two units (bought two) are telling me to be careful.
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