DFRobot
Waterproof SMD DS18B20 Digital Temperature Sensor
This waterproof DS18B20 digital temperature sensor delivers accurate readings over a simple 1-Wire interface, requiring just a single data pin on your microc...
This waterproof DS18B20 digital temperature sensor delivers accurate readings over a simple 1-Wire interface, requiring just a single data pin on your microcontroller. The sealed probe and silicone lead wire make it ideal for measuring temperatures in wet environments, outdoors, or at a distance from your controller.
Each sensor has a unique 64-bit serial code, allowing multiple DS18B20 sensors to share the same 1-Wire bus. This makes it straightforward to build distributed temperature monitoring systems using a single GPIO pin on an Arduino or Raspberry Pi.
Key Features
- Waterproof Probe – Sealed stainless steel housing for wet and outdoor environments
- 1-Wire Interface – Only one data pin required; multiple sensors can share the same bus
- Configurable Resolution – 9 to 12-bit selectable precision
- Wide Temperature Range – Measures from −55°C to +125°C (operating accuracy ±0.5°C from −10°C to +85°C)
- Digital Output – No signal degradation over long cable runs
- Unique 64-Bit ID – Each sensor individually addressable for multi-sensor setups
- Silicone Lead Wire – Heat-resistant cabling rated to 125°C
- Wide Supply Voltage – 3V to 5.5V operation
Wiring
- Red – VCC (3–5.5V)
- Black – GND
- Blue – DATA (1-Wire)
Ideal For
- Aquarium, pool, and water temperature monitoring
- Weather stations and outdoor environmental sensing
- HVAC and building climate control systems
- Homebrew and fermentation temperature tracking
- Arduino and Raspberry Pi projects
Package Contents
- 1× Waterproof SMD DS18B20 Digital Temperature Sensor
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 1-Wire
- 1-Wire is a communication method where devices share a single data line, often with each device having its own address. It matters because several temperature modules can be connected to one microcontroller pin instead of needing a separate pin for each probe.
- DS18B20
- A common digital temperature sensor often sold in waterproof probe form. It matters here because the kit does not include temperature measurement, and a DS18B20 is the suggested add-on if your water readings need temperature context.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
Find this product in
DS18B20 Waterproof SMD Temperature Sensor Datasheet
Datasheet · 383.0 KB · Click any page to view full size
Supplier page — dfrobot.com
Supplier Description · 316.9 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
