Waterproof DS18B20 Temperature Sensor with digital 1-Wire output from Dallas. The temperature range it measures is from -55°C to +125°C with a resolution of 9-12 bits and an accuracy of ±0.5°C (–10°C to +85°C). Each DS18B20 sensor has a unique 64-bit serial number that allows multiple sensors to be connected together on the same "bus" cable. The power supply ranges from 3.0V to 5.5V DC. Compatible with most development boards, such as Arduino, Raspberry.