Shelly Temperature Sensor

The Shelly Temperature Sensor is a precision add-on sensor designed to integrate seamlessly with compatible smart-home controllers from the Shelly range. It uses the DS18B20 digital temperature probe to deliver accurate Celsius measurements through a simple 1-Wire interface. With a 1-metre cable and robust waterproof housing, the sensor is suitable for indoor and outdoor installations, offering flexibility and reliability for a wide range of applications.

Because it communicates via a single data line (plus ground), the sensor can easily be connected to modules such as the Shelly Add-On and extends the functionality of existing switches or relays to include real-time temperature monitoring. It also supports customisable temperature-threshold alarms, enabling smart-home systems to react when temperatures move outside set limits.

Key Features

• Accurate Temperature Measurement: Uses digital DS18B20 probe with 9-bit to 12-bit resolution for stable and precise readings..
• Waterproof and Dust-Proof (IP67): Protective housing and cabling make the sensor suitable for humid or damp environments, indoor or outdoor.
• Plug-and-Play 1-Wire Connection: Requires only a single data line and ground for operation, simplifying wiring and installation.
• Customisable Alarm Function: Built-in alerting when temperature moves outside defined upper or lower thresholds, useful for safety or climate control.
• Flexible Placement: 1-metre cable provides installation flexibility, enabling placement inside enclosures, HVAC ducts, or less accessible locations.

Technical Specifications

• Sensor type: DS18B20 digital temperature sensor
• Temperature resolution: 9-bit to 12-bit (user-selectable)
• Measurement range: –55 °C to +125 °C
• Accuracy: ±0.5 °C (in range –10 °C to +85 °C)
• Cable length: 1 metre or 3 metres
• Protection rating: IP67 (dust and waterproof)
• Interface: 1-Wire bus (single data line + ground)
• Housing: Stainless-steel probe with waterproof cable
• Compatibility: Works with Shelly Add-On modules for integration with Shelly Plus 1, Plus 1PM, Plus 2PM and similar relay/switch units

Use Cases

• Monitoring room temperature for home heating or cooling control systems
• Climate control for garages, basements, greenhouses or outbuildings, including monitoring for frost or overheating
• Temperature monitoring in water-heaters, boilers, or HVAC equipment when combined with a suitable relay controlling heating elements
• Smart-home automation scenarios such as activating fans, heaters, or dehumidifiers when temperature crosses specified thresholds
• Industrial or machinery monitoring where temperature monitoring is required for safety or operational efficiency