DS18B20 Waterproof Digital Temperature Sensor - 1m Cable | ATMOSFÆR ENGINEERING

High-precision 1-Wire digital temperature sensor in waterproof stainless steel probe with 1-meter cable. Measures -55°C to +125°C with ±0.5°C accuracy. Single-wire communication protocol allows multiple sensors on one GPIO pin. Pre-wired and sealed for direct immersion in liquids. Ideal for water temperature monitoring, aquariums, HVAC systems, weather stations, and industrial temperature measurement.

Technical Specifications:

• Sensor IC: Dallas/Maxim DS18B20
• Interface: 1-Wire Protocol (single data wire + power)
• Temperature Range: -55°C to +125°C
• Accuracy: ±0.5°C (-10°C to +85°C)
• Resolution: 9-bit to 12-bit (0.5°C to 0.0625°C), user-selectable
• Conversion Time: 750ms (12-bit resolution)
• Operating Voltage: 3.0V - 5.5V
• Probe Material: Stainless steel (waterproof, corrosion-resistant)
• Cable Length: 1 meter
• Cable Type: 3-wire (Red: VCC, Black: GND, Yellow/White: Data)
• Probe Diameter: 6mm (typical)
• Probe Length: 30-50mm (typical)
• Protection Rating: IP67/IP68 (fully waterproof)

Pin Configuration:

• Red: VCC (3.3V or 5V)
• Black: GND
• Yellow/White: Data (1-Wire signal)

Features:

• Fully waterproof stainless steel probe (submersible)
• Pre-wired with 1m cable (ready to use)
• Digital output (no analog calibration required)
• Multi-drop capability (connect multiple sensors to one pin)
• Unique 64-bit serial code (each sensor individually addressable)
• Programmable resolution (9/10/11/12-bit)
• Wide voltage range (3V-5.5V)

Applications:

• Aquarium and fish tank temperature monitoring
• Pool and hot tub temperature control
• Hydroponics and greenhouse systems
• HVAC and heating system monitoring
• Weather stations (soil/water temperature)
• Brewing and fermentation temperature control
• Industrial process monitoring
• Refrigeration and cooling systems
• Boiler and water heater monitoring

Important Notes:

• Requires 4.7kΩ pull-up resistor on data line
• Allow 750ms for temperature reading
• Each sensor has unique ID for multi-sensor setups
• Probe is waterproof but cable connection may require sealing

Compatible with Arduino, ESP32, Raspberry Pi, STM32, and any microcontroller with GPIO. Libraries available for easy integration.