Sparkfun Electronics DS18B20 Waterproof Temperature Sensor

The DS18B20 Waterproof Temperature Sensor is a sealed digital temperature probe which lets you precisely measure temperatures in wet environments with a simple 1-Wire interface. The DS18B20 provides 9 to 12-bit (configurable) temperature readings over a 1-Wire interface. Sealed digital temperature probe; Precisely measures temperatures in wet environments; Accuracy: ±0.5°C from -10°C to +85°C; RoHS compliant