DS18B20 IP68 Waterproof Temperature Sensor – Submersible Water Temp Probe 1meter

Description

The DS18B20 IP68 Waterproof Temperature Sensor is a rugged, submersible temperature probe designed for accurate digital temperature measurement in wet, harsh, and outdoor environments. Unlike the bare DS18B20 TO-92 sensor—which cannot be submerged—this probe encapsulates the original Maxim DS18B20 chip inside a stainless steel sheath filled with sealing compound, delivering reliable performance in water tanks, aquariums, hydroponic systems, and industrial process monitoring .

At the heart of the probe is the Maxim DS18B20 digital thermometer, which provides 9-bit to 12-bit selectable resolution and a measurement range of -55°C to +125°C. Accuracy is ±0.5°C over the critical -10°C to +85°C range, making it suitable for precise environmental and process control . The 1-Wire interface requires only one data line (plus power and ground) for communication, and each sensor carries a unique 64-bit serial code, allowing multiple probes to share a single microcontroller pin—ideal for distributed temperature sensing across large areas or multi-zone systems .

The IP68-rated stainless steel housing (approximately 6mm diameter) protects the sensor from water ingress, corrosion, and physical damage, making it suitable for continuous submersion in fresh water. The 1-meter PVC-jacketed cable provides flexible placement, with standard wire colors: Red for VCC, Yellow for DATA, and Black for GND . The probe operates from 3.0V to 5.5V, compatible with Arduino, Raspberry Pi, ESP32, STM32, and other microcontrollers .

Important Note: While the probe is IP68 waterproof and suitable for fresh water, it is not intended for salt water or other corrosive liquids . The PVC cable jacket is rated for temperatures up to approximately 100°C; for higher-temperature applications, a probe with a PTFE or silicone cable is recommended. A 4.7kΩ pull-up resistor between the DATA and VCC lines is required for reliable 1-Wire communication—many breakout adapters include this resistor, but verify your setup . For Arduino, the OneWire and DallasTemperature libraries simplify code development .

Whether you are monitoring aquarium temperature, automating a hydroponic system, or logging data in an outdoor weather station, this waterproof DS18B20 probe provides a reliable, well-supported solution for submersible temperature measurement.

Features

• Original Maxim DS18B20 sensor — Digital temperature output with 9–12 bit selectable resolution

• IP68 waterproof stainless steel probe — Submersible in fresh water; resistant to corrosion and physical damage

• 1-meter cable — Flexible placement with color-coded wires (Red: VCC, Yellow: DATA, Black: GND)

• Wide temperature range — -55°C to +125°C with ±0.5°C accuracy from -10°C to +85°C

• 1-Wire interface — Only one data pin required; multiple sensors share the same bus

• Unique 64-bit serial code — Each probe is individually addressable for multi-sensor networks

• 3.0V to 5.5V operation — Compatible with Arduino, Raspberry Pi, ESP32, and STM32

• Stainless steel sheath (6mm diameter) — Durable and hygienic for water and food-adjacent applications

• Wide application range — Aquariums, hydroponics, HVAC, industrial process monitoring, weather stations

• Library support — OneWire and DallasTemperature libraries for Arduino

Technical Specifications