DS18B20 Waterproof Digital Temperature Sensor (with Cable)

DS18B20 Waterproof Digital Temperature Sensor (with Cable)

The DS18B20 Waterproof Temperature Sensor is a high-accuracy digital temperature sensor designed for reliable temperature measurement in wet, humid, and harsh environments. It comes enclosed in a stainless steel waterproof probe with a durable insulated cable, making it ideal for industrial, outdoor, and IoT applications.

Working Principle

The DS18B20 uses an internal digital temperature-sensing IC that directly converts temperature into a digital signal. It communicates using the 1-Wire protocol, allowing multiple sensors to be connected using just one data pin.

Each sensor has a unique 64-bit ID, enabling multiple DS18B20 sensors to operate on the same data line without conflict.

Key Features

• Fully digital temperature sensor

• Waterproof stainless steel probe

• 1-Wire communication (single data pin)

• High accuracy and stability

• Unique ID for multi-sensor networks

• Long cable for flexible installation

Electrical Specifications

• Sensor Type: Digital temperature sensor

• Temperature Range: −55 °C to +125 °C

• Accuracy:

  • ±0.5 °C (−10 °C to +85 °C)

• Resolution: 9-bit to 12-bit (programmable)

• Operating Voltage: 3.0 V – 5.5 V

• Interface: 1-Wire

• Conversion Time: ≤750 ms (12-bit)

Wire Color Code

• Red: VCC

• Black: GND

• Yellow / White: Data

(Requires a 4.7 kΩ pull-up resistor on the data line)

Advantages

• No analog noise or ADC error

• Easy to connect with Arduino, Raspberry Pi, ESP32

• Works over long cable lengths

• Excellent accuracy without calibration

• Suitable for harsh and wet environments

Applications

• IoT temperature monitoring systems

• Water temperature measurement

• Weather stations

• Smart agriculture and aquaculture

• HVAC systems

• Industrial automation

• Solar water heaters

• Freezers and cold storage

Conclusion

The DS18B20 Waterproof Digital Temperature Sensor is a robust, accurate, and easy-to-use solution for temperature monitoring. Its digital output, waterproof design, and 1-Wire interface make it an excellent choice for IoT, automation, and outdoor applications, especially where reliability and accuracy are critical.