This Digital temperature sensor DS18B20 will tell you, with 9 to 12 bit resolution! Uses only 1 wire to the Arduino or other microcontroller for communication. With the One Wire protocol, you can operate a large number of these sensors from one Arduino pin. Simple to use and highly accurate. Measures temperatures from -55°C to 125°C (-67°F to 257°F).

Features:

• board DS18B20 chip DS18B20 chip left 3P round hole seat is easily accessible at the same time
• chip pin all leads, built-in pull-up resistor
• on-board power indicator
• board size: 21 (mm) x10 (mm)