DS18B20 Temperature Sensor

A digital temperature sensor with an unusual advantage: dozens of them share a single Arduino pin, because each carries a unique 64-bit address burned in at the factory. That makes it the right choice whenever you need temperature in several places at once — a boiler flow and return, multiple zones in a greenhouse, or a fermentation tank at different depths. Waterproof probe versions immerse directly in liquid. Accuracy is plus or minus 0.5 degrees across most of its range. Many sensors share one Arduino pin via unique addresses; Waterproof probe versions available for liquids; Digital output, immune to analogue wiring noise; Wide range from minus 55 to 125 C