You can remotely measure temperature using a 4- to 20-mA current loop as long as 4000 feet and a battery-powered, white-light LED driver. You usually configure this equipment to provide a programmable ...
Last time, I disassembled La Crosse Technology’s TX61U-IT solar-powered temperature sensor and wireless transmitter, the companion to the company's WS-811561-W temperature station (plus atomic ...
This minuscule chip can measure the temperature wherever it’s placed—and it never needs a battery, because it’s powered by the radio waves from the same wireless network that it uses to communicate.
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