DS18B20 Digital Temperature Sensor

This is a pre-wired and waterproofed version of the DS18B20 sensor.

Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125C the cable is jacketed in PVC so we suggest keeping it under 100C. Because they are digital, you don’t get any signal degradation even over long distances!

These 1-wire digital temperature sensors are fairly precise (0.5C 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.

We toss in a 4.7k (for long cable) & 2.2k (for short cable) resistor, which is required as a pullup from the DATA to VCC line when using the sensor.

• Unique 1-Wire Interface Requires Only One Port Pin for Communication
• Each Device has a Unique 64-Bit Serial Code Stored in an On-Board ROM
• Multidrop Capability Simplifies Distributed Temperature-Sensing Applications
• Requires No External Components
• Can Be Powered from Data Line; Power Supply Range is 3.0V to 5.5V
• Measures Temperatures from -55C to +125C (-67F to +257F)
• 0.5C Accuracy from -10C to +85C
• Thermometer Resolution is User Selectable from 9 to 12 Bits
• Converts Temperature to 12-Bit Digital Word in 750ms (Max)

Specifications

Resources

Datasheets
Libraries
Sample Code

Tutorials