Waterproof 18B20 Temperature Probe Waterproof Stainless Steel
This is a pre-wired and waterproofed version of the DS18B20 sensor. Handy for when you need to measure something in wet conditions. While the sensor is good up to 125°C the cable is jacketed in PVC so we suggest keeping it under 100°C. Because they are digital, you don't get any signal degradation even over long distances! These 1-wire digital temperature sensors are fairly precise (±0.5°C over much of the range) and can give up to 12 bits of precision from the onboard digital-to-analog converter. They work great with any microcontroller using a single digital pin, and you can even connect multiple ones to the same pin, each one has a unique 64-bit ID burned in at the factory to differentiate them. Usable with 3.0-5.0V systems.
A 4.7K resistor is required as a pullup from the DATA to VCC line when using the sensor.
Not tested in salt water or corrosive environments
DS18B20 Technical specs: