The DS18B20 Temperature Sensor is a high-precision, digital thermometer designed for accurate and reliable temperature monitoring in a wide range of applications. With a measurement range of –55°C to +125°C and an accuracy of ±0.5°C (–10°C to +85°C), it is an ideal choice for both hobbyists and industrial applications.
Unlike analog sensors, the DS18B20 outputs temperature data in digital format using the 1-Wire communication protocol, allowing data transfer over a single microcontroller pin. This not only simplifies wiring but also supports multi-drop capability, meaning you can connect multiple DS18B20 sensors on the same bus line. Each sensor comes with a unique 64-bit serial code, enabling precise identification in networks with many devices.
The DS18B20 provides a programmable resolution from 9 to 12 bits, letting you balance between speed and accuracy as per project requirements. For example, higher resolution offers more precise readings, while lower resolution ensures faster conversions.
It operates on a 3.0V to 5.5V power supply, making it fully compatible with a wide range of platforms, including Arduino, ESP8266, ESP32, Raspberry Pi, STM32, and other microcontrollers. It also supports parasitic power mode, where it can operate without an external power supply by drawing energy directly from the data line, reducing wiring complexity.
The DS18B20 is available in multiple packaging styles, including the standard TO-92 form and waterproof stainless-steel probes, making it suitable for indoor, outdoor, and liquid-based measurements. With proper wiring, it can reliably transmit data over long distances, making it ideal for remote sensing applications.
Key Features
- Wide Temperature Range: –55°C to +125°C
- High Accuracy: ±0.5°C (–10°C to +85°C)
- Programmable Resolution: 9 to 12 bits
- 1-Wire Communication Protocol (single data pin required)
- Unique 64-bit serial code for each device
- Supports parasitic power mode
- Long-distance communication capability
- Compatible with Arduino, Raspberry Pi, ESP32, ESP8266, STM32 and more
- Available in TO-92 package and waterproof probe versions
Applications
- Weather Stations – outdoor temperature monitoring
- HVAC Systems – heating, cooling, and ventilation controls
- Aquariums & Aquaponics – precise water temperature sensing
- Incubators & Greenhouses – stable environmental control
- Industrial Equipment Monitoring – machinery and pipelines
- Home Automation & IoT Projects – smart home temperature control
Package Type: TO-92
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