DS18B20 Digital Temp Sensor Module 1-Wire -55 to +125°C
DS18B20 Digital Temperature Sensor Module – 1-Wire, -55°C to +125°C, ±0.5°C Accuracy
The DS18B20 is a digital thermometer that communicates over a 1-Wire bus, allowing multiple sensors to be connected using only one GPIO pin. It measures temperatures from -55°C to +125°C with ±0.5°C accuracy across a wide range, making it perfect for environmental monitoring, home automation, and industrial control. The module includes the sensor, a 4.7kΩ pull-up resistor, and a convenient 3-pin terminal for easy connection.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.0V to 5.5V |
| Temperature Range | -55°C to +125°C |
| Accuracy | ±0.5°C (-10°C to +85°C) |
| Resolution | 9-bit to 12-bit (configurable) |
| Interface | 1-Wire (Dallas protocol) |
| Pull-up Resistor | Onboard 4.7kΩ |
What You Can Build With This
- Weather station with multiple DS18B20 sensors
- Smart thermostat for home heating/cooling systems
- Aquarium or terrarium temperature controller
- Server room ambient temperature monitor
Compatibility
Works with any microcontroller supporting digital I/O, including Arduino Uno/Mega, ESP8266/ESP32, Raspberry Pi, and STM32. The 1-Wire protocol is widely supported by libraries, and the 3.0–5.5V operating range ensures direct connectivity to 3.3V and 5V logic levels.
Wiring Notes
Connect VCC to 3.3V or 5V, GND to ground, and DATA to a digital pin. A 4.7kΩ pull-up resistor between VCC and DATA is required; this module includes it onboard. For longer cable runs, use twisted pair and consider adding a capacitor for noise filtering.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
Yes, the DS18B20 works directly with Arduino Uno using the OneWire and DallasTemperature libraries. Connect DATA to any digital pin (e.g., D2), and power from 5V.
Can I connect multiple sensors on one wire?
Yes, each DS18B20 has a unique 64-bit serial code, allowing multiple sensors to share the same 1-Wire bus. Simply connect all DATA lines together with a single pull-up resistor.
Does it work over long distances?
In standard mode, cable lengths up to 50 meters are possible. For longer runs, use a dedicated 1-Wire driver or lower the bus speed.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items