DS18B20 Waterproof Temperature Sensor 3 Wire 100cm
The DS18B20 Waterproof Temperature Sensor is a robust, high-precision digital sensor encased in a stainless steel probe, ensuring reliable performance in harsh and wet conditions. Its IP68-rated waterproof sealing makes it suitable for both indoor and outdoor environments where moisture or immersion is likely. With a 100cm pre-wired cable, this sensor is perfect for flexible installations in diverse projects such as home automation, weather monitoring, industrial control, and scientific research. Using the 1-Wire communication protocol, multiple sensors can share a single microcontroller pin, simplifying wiring and reducing resource usage.
How It Works
The DS18B20 contains a digital temperature sensing element that measures ambient or liquid temperatures and converts them into accurate digital signals. Once powered, it performs thermal-to-digital conversion, storing the result in its internal register. Data is transmitted to the microcontroller through the 1-Wire interface, which reduces interference and ensures stable readings over long cables. The resolution is adjustable from 9 to 12 bits, giving the user control over measurement speed and accuracy. Its stainless steel housing protects the sensing element from physical damage and liquid exposure, making it ideal for submerged applications in water, oil, or chemical solutions.
Key Features
Fully waterproof stainless steel probe
3-wire connection (VCC, GND, Data) for easy setup
High ±0.5°C accuracy from -10°C to +85°C
Wide temperature range: -55°C to +125°C
Digital 1-Wire communication
Multiple sensors on one data line
100cm cable for versatile installation
Low power operation for battery use
Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 3.0 V to 5.5 V |
| Temperature Range | -55°C to +125°C |
| Accuracy | ±0.5°C (-10°C to +85°C) – |
| Resolution | 9–12 bits programmable |
| Output | Digital via 1-Wire |
| Cable Length | 100 cm |
| Probe Material | Stainless steel |
| Probe Size | 6 mm × 50 mm |
| Waterproof Rating | IP68 |
Pin Configuration
| Wire Color | Name | Description |
|---|---|---|
| Red | VCC | Power supply |
| Black | GND | Ground |
| Yellow | DQ | Data signal |
Applications
Aquarium and liquid temperature monitoring
Weather and environmental monitoring systems
Industrial automation and process control
Heating and cooling regulation systems
Agricultural soil and water temperature tracking
Scientific and laboratory experiments
