The DS18B20 Waterproof Temperature Probe is a digital temperature sensing solution designed for accurate and reliable temperature measurement in wet, humid, or harsh environments. Encased in a stainless-steel probe with a waterproof cable, it is ideal for liquid temperature monitoring, outdoor sensing, and industrial or DIY applications where conventional sensors cannot be exposed directly.
Core Sensor Specifications
• Sensor Type: Digital temperature sensor
• Sensor IC: DS18B20
• Measurement Method: 1-Wire digital communication
• Probe Type: Stainless steel waterproof probe
Electrical & Interface
• Operating Voltage: 3.0 V – 5.5 V
• Communication Protocol: 1-Wire
• Data Output: Digital
• Wiring: Red (VCC), Black (GND), Yellow/White (DATA)
• Pull-up Resistor: 4.7 kΩ required on data line
Performance Characteristics
• Temperature Measurement Range: −55 °C to +125 °C
• Accuracy: ±0.5 °C (−10 °C to +85 °C)
• Resolution: Programmable 9-bit to 12-bit
• Conversion Time: Up to 750 ms (12-bit)
• Stable digital output, immune to analog noise
Physical Characteristics
• Probe Material: Stainless steel
• Probe Diameter: ~6 mm
• Cable Length: Typically 1 meter (module dependent)
• Waterproofing: Suitable for immersion in liquids
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32
• STM32, AVR, PIC microcontrollers
• Raspberry Pi (1-Wire support)
Key Advantages
• Fully waterproof probe for liquid and outdoor use
• Digital output ensures accurate readings over long cables
• Multiple sensors can share a single data pin
• No calibration required for standard applications
Technical Insights
• Each DS18B20 has a unique 64-bit address
• Supports parasitic power mode if required
• Best accuracy achieved using external power mode
• Long cable lengths supported with proper pull-up
Applications
• Water temperature monitoring
• Aquariums and fish tanks
• Weather stations
• HVAC systems
• Industrial and DIY temperature control projects
Pro Tip
• Use external power instead of parasitic mode for stability
• Avoid bending the probe cable sharply near the sensor tip
• Place pull-up resistor close to the microcontroller
Package Includes
• 1 × DS18B20 Waterproof Temperature Probe