DS18B20 Waterproof Temperature Probe – Black (1m)

Product Description The DS18B20 Waterproof Temperature Probe is a precision digital thermal sensor encased in a high-quality stainless steel tube. Unlike analog thermistors, this sensor communicates over a specialized "1-Wire" bus, meaning multiple sensors can share a single digital pin on your microcontroller. The waterproof housing and 1-meter cable make it the ideal solution for measuring temperatures in wet environments, such as aquarium monitoring, soil sensing, or liquid tank tracking. With a wide measurement range and factory-calibrated accuracy, it provides reliable digital data without the need for complex analog-to-digital conversion or calibration code.

Key Features

• Fully Waterproof Design: The sensor is sealed inside a corrosion-resistant stainless steel probe (6mm diameter) for long-term submersion.

• 1-Wire Digital Interface: Requires only one digital port pin for communication, allowing for high-density sensor networks.

• Unique 64-Bit Serial Code: Every sensor has a unique hard-coded ID, enabling the microcontroller to address multiple probes on the same wire.

• No External Components: Operates without the need for an ADC; the digital-to-temperature conversion happens entirely inside the probe.

• Flexible Resolution: User-programmable resolution from 9 to 12 bits, allowing you to balance speed and precision.

Technical Details

• Core Integrated Circuit: Utilizes the original Maxim Integrated DS18B20 digital thermometer IC.

• Temperature Accuracy: Maintains a high precision of ±0.5°C within the most critical range of -10°C to +85°C.

• Wide Operating Range: Capable of measuring extreme temperatures from as low as -55°C to a peak of +125°C.

• Power Modes: Supports "Parasite Power" mode, where the sensor derives power directly from the data line, reducing wiring to just two leads.

• Stainless Steel Housing: The 6x50mm probe is made of high-grade steel to prevent rust and ensure rapid thermal conductivity.

• Cable Construction: Features a 100cm (1 meter) flexible PVC-jacketed cable suitable for routing through conduits or around obstacles.

• Wiring Identification: Standard color code: Red (VCC), Black (GND), and Yellow/White (DATA).

• Conversion Time: Rapid 12-bit temperature-to-digital conversion in less than 750ms.

• Non-Volatile Memory: Includes user-definable non-volatile alarm settings (TH and TL) that persist even when power is removed.

• Digital Signal Stability: Digital transmission ensures zero signal degradation over long cable lengths compared to analog sensors.

• Logic Compatibility: Works natively with 3.3V systems like ESP32/Raspberry Pi and 5V systems like Arduino.

• EMI Resistance: The 1-Wire protocol includes CRC (Cyclic Redundancy Check) to ensure data integrity in electrically noisy environments.

• Multi-Drop Capability: Can be distributed over a large area; up to 100 sensors can theoretically be connected to a single bus.

• Environmental Sealing: The junction between the cable and the probe is reinforced with heat-shrink tubing to prevent moisture ingress.

• Mounting Versatility: The 6mm diameter probe fits standard thermowell fittings for industrial boiler or pipe monitoring.