Hook a few of these up to your Raspberry Pi, Arduino or other microcontroller and keep an eye on the temperatures of all sorts of things!
These digital temperature sensors are an inexpensive, no-fuss way to gather temperature readings - whether you're looking to monitor your hot water tank, aquarium, greenhouse, or just ambient air temperature. They use a 1-Wire interface, which means that multiple sensors can share the same data pin - each sensor comes with a unique 64 bit serial code which will let you read them seperately.
The stainless steel casing is waterproof, moisture proof and rustproof. It's attached to 1m of cable so you get a lot of flexibility about how and where you position the sensor.
Check out the tutorials below for wiring diagrams and code suggestions!
Raspberry Pi tutorials: Les P / Adafruit