The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements. It uses a 1 wire bus to communicate.
Each device has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus.
It has an operating temperature range of -55°C to +125°C and is accurate to ±0.5°C over the range of -10°C to +85°C.