Shelly DS18B20 Temperature Sensor with 3 m Cable

Wired temperature sensor Shelly DS18B20 with 3 m cable provides single-point digital temperature readings using the DS18B20 sensor element. Designed for connection to compatible Shelly devices and other controllers that accept a DS18B20 sensor, this probe enables remote temperature monitoring in a compact, cable-mounted form factor. The 3 m cable allows flexible placement in systems where the primary controller is at a distance from the measurement point. The sensor is suitable for indoor and sheltered outdoor use when protected from direct water ingress and extreme mechanical stress.

Advantages

The Shelly DS18B20 sensor delivers accurate digital temperature measurements with simple wiring and reliable communication over the sensor interface. Its 3 m cable provides reach for installation in HVAC systems, enclosures, appliances, or small environmental zones. Being based on the DS18B20 element ensures compatibility with a wide range of controllers and predictable thermal performance across typical ambient temperature ranges. The probe’s compact tip and flexible cable make it straightforward to position within ducts, tanks, or confined spaces while minimizing installation complexity.

Suitable for

• HVAC temperature monitoring and control
• Aquarium and terrarium temperature measurement
• Refrigerators, freezers and cold storage monitoring
• Greenhouse or small-scale agricultural temperature sensing
• Embedded projects and controllers compatible with DS18B20

Key specifications

• Sensor type: DS18B20 digital temperature sensor element
• Cable length: 3 meters, flexible insulated lead
• Measurement range: typical DS18B20 operational range (-55°C to +125°C) with best accuracy within common ambient ranges
• Resolution: up to 12-bit conversion (device-dependent when used with compatible controller)
• Interface: single-wire digital bus compatible with DS18B20 protocol
• Probe form factor: sealed probe tip with attached cable for remote placement

How to use

Connect the Shelly DS18B20 sensor to a compatible Shelly device or controller following the controller’s wiring diagram for a DS18B20 probe: attach the data lead to the designated sensor input, and connect power and ground as required by the host device. Place the probe tip at the measurement point and secure the cable to avoid strain on the sensor connection. After wiring, configure the host device to read temperature from the DS18B20 input and select the appropriate resolution or sampling interval as supported by the controller. Verify readings in the host’s interface and allow a short stabilization period after placement to ensure accurate measurement.

Recommendations

For reliable long-term performance, avoid exposing the cable junction or probe tip to direct immersion in open water unless the host’s documentation specifies suitability for submersion. Route the cable away from strong heat sources or moving parts, and secure it to prevent mechanical strain. When used outdoors or in humid environments, provide additional protection (for example, a protective sleeve or conduit) at the cable entry points. Calibrate and verify readings within the host system when precise temperature control is required.