Description DS18B20 Waterproof Temperature Sensor The DS18B20 Temperature Sensor is a high-precision digital temperature sensor designed for accurate temperature measurement in demanding environments. Encapsulated in a waterproof stainless steel probe, it is ideal for Arduino, ESP32, Raspberry Pi, industrial automation, HVAC systems, aquariums, weather stations, and smart agriculture. This product includes multiple cable lengths as well as a convenient version with a 2.54mm connector and 2.5mm Audio Jack, making installation faster and more flexible. Available Variants Variant Cable Length Standard Probe 1 Meter Standard Probe 2 Meters Standard Probe 3 Meters Standard Probe 5 Meters Standard Probe 1 Meter 2.54mm Connector Sensor Only No Cable (if available) Key Features Original DS18B20 digital temperature sensor Waterproof stainless steel probe Single-wire digital interface Accurate temperature measurement Supports long cable transmission Wide operating temperature range 9–12 bit programmable resolution Multiple cable lengths available 2.54mm connector option Excellent long-term stability Easy integration with development boards Suitable for indoor and outdoor applications Technical Specifications Parameter Specification Sensor Model DS18B20 Interface 1-Wire Digital Supply Voltage 3.0V–5.5V Temperature Range -55°C to 125°C Accuracy ±0.5°C (-10°C to 85°C) Resolution 9–12 Bit Probe Material Stainless Steel Waterproof Rating IP68 Probe Diameter 6 mm Probe Length 50 mm Cable Material PVC Cable Length 1M / 2M / 3M / 5M Compatible Platforms The sensor works with a wide variety of embedded development platforms, including: Arduino Uno Arduino Nano Arduino Mega ESP8266 ESP32 Raspberry Pi STM32 PIC Microcontrollers PLC Systems For quick prototyping, this sensor pairs perfectly with our Dupont Jumper Wires, Nano V3 CH340 Development Board, and USB Cable for Arduino, allowing rapid setup without additional wiring complexity. Typical Applications This waterproof digital temperature probe is suitable for both hobby and industrial projects. Typical applications include: Water temperature monitoring Aquarium controllers Brewing systems Smart greenhouse automation Weather stations HVAC control Cold chain monitoring Industrial equipment Refrigeration systems IoT projects Home automation Environmental monitoring Why Choose the Waterproof Version? Stainless Steel Protection The stainless steel housing protects the sensor from moisture, corrosion, and mechanical damage, making it suitable for continuous operation in wet environments. Long Cable Options Available in 1M, 2M, 3M, and 5M cable lengths, the sensor can easily be installed where the controller is located away from the measurement point. 2.54mm Connector Version & 2.5mm Audio Jack The 1M version with a 2.54mm connector & 2.5mm audio jack allows direct connection to many development boards and sensor expansion shields without soldering, making it especially convenient for prototyping and educational projects. Easy Integration Using the standard 1-Wire communication protocol, multiple sensors can share the same data line, reducing wiring complexity while maintaining reliable digital communication. The sensor is fully supported by the Arduino ecosystem and many open-source libraries, allowing developers to start temperature monitoring with minimal setup. Package Includes One selected variant: DS18B20 1M DS18B20 2M DS18B20 3M DS18B20 5M DS18B20 1M with 2.54mm Connector Learn More For more information regarding this DS18B20 temperature sensor, click here to view the tutorial video. FAQ Q1: Does this sensor require a pull-up resistor? Yes. A 4.7kΩ pull-up resistor between the DATA and VCC lines is recommended for reliable OneWire communication unless your development board or expansion module already includes one. Q2: What is the difference between the standard version and the 2.54mm connector version? Both versions use the same DS18B20 sensor. The connector version simply adds a 2.54mm plug, allowing faster installation on compatible development boards and reducing the need for manual wiring. Q3: Can I use multiple DS18B20 sensors on one Arduino pin? Yes. The DS18B20 supports the 1-Wire protocol, allowing multiple sensors to share a single data pin. Each sensor has a unique factory-programmed address, making it easy to identify and read individual devices.