DS18B20 Digital Temperature Sensor

DS18B20 Digital Temperature Sensor — 1-Wire Interface

The DS18B20 is a programmable 1-Wire digital temperature sensor from Maxim Integrated, widely used in harsh environments including chemical solutions, soil, and water. Each sensor has a unique 64-bit address, allowing multiple sensors on a single data line without additional MCU pins.

Key Features

• 1-Wire interface — only one MCU pin required
• Temperature range: -55°C to +125°C
• Accuracy: ±0.5°C (from -10°C to +85°C)
• Programmable resolution: 9 to 12 bits
• Unique 64-bit address — multiple sensors on one bus
• Available in TO-92 and waterproof probe versions
• Operating voltage: 3.0V – 5.5V

Applications

• Environmental temperature monitoring
• Soil and water temperature measurement
• HVAC and industrial temperature control
• Arduino and Raspberry Pi temperature projects