DS18B20 Temperature Sensor

DS18B20 Temperature Sensor Overview

The DS18B20 Temperature Sensor is a compact digital thermometer that delivers reliable temperature readings with easy 1-Wire communication. Its digital output simplifies wiring by using a single data pin and supports multiple sensors on the same bus. The DS18B20 is suitable for hobbyist projects, home automation, industrial monitoring, and IoT applications.

Why Choose the DS18B20 Temperature Sensor

• Accurate and stable temperature measurements over a wide range.
• Single-wire data communications reduce wiring complexity.
• Unique 64-bit serial code for easy identification in multi-sensor networks.
• Multiple package options including waterproof probe for harsh environments.

Technical Specifications

• Temperature range: -55°C to +125°C
• Accuracy: ±0.5°C ( -10°C to +85°C )
• Resolution: Programmable 9 to 12 bits
• Communication: 1-Wire protocol (single data pin)
• Unique ID: 64-bit serial code per device
• Supply voltage: 3.0V to 5.5V
• Power options: Normal supply or parasitic power mode (power from data line)
• Available packages: TO-92 and waterproof stainless-steel probe

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

Compatibility and Power

The DS18B20 operates from 3.0V to 5.5V, making it compatible with a wide variety of microcontrollers and development boards including Arduino, ESP8266, ESP32, Raspberry Pi, and STM32. It also supports parasitic power mode so the sensor can operate using power pulled from the data line, reducing the number of wires required for simple installations.

Packaging and Installation

Choose the standard TO-92 package for breadboard and PCB prototyping or the waterproof stainless-steel probe for outdoor and liquid measurements. The 1-Wire bus supports multiple sensors on the same wire; each sensor is identified by its unique 64-bit address. With proper wiring and pull-up resistor placement, the DS18B20 can reliably communicate over long distances for remote sensing applications.

Common Applications

• Weather stations and outdoor temperature monitoring
• HVAC systems for heating, ventilation, and cooling control
• Aquariums and aquaponics for water temperature sensing
• Incubators and greenhouses for environmental stability
• Industrial equipment and pipeline monitoring
• Home automation and IoT temperature monitoring

Getting Started with Arduino and Raspberry Pi

Quick tips to begin:

• Wiring: Use a 4.7k pull-up resistor between data and Vcc for reliable 1-Wire communication. For parasitic mode, connect Vcc to ground and use the data line for power.
• Arduino libraries: Use OneWire and DallasTemperature libraries for easy integration and example sketches.
• Raspberry Pi: Use w1-gpio and w1-therm kernel modules or Python libraries like w1thermsensor for reading values.
• Resolution: Set sensor resolution to 9 bits for faster readings or 12 bits for maximum precision.

Ordering and Package Type

Package type: TO-92. The DS18B20 is also available in waterproof stainless-steel probe variants for liquid and outdoor use. Images are for illustration purposes only.