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Reliable and durable SONOFF waterproof temperature sensor with RJ9 (4P4C) connector for accurate measurements from -40 to 115 °C. It offers ±0.5 °C accuracy (within -10 to 85 °C), a 1.5 m cable for flexible installation, and instant compatibility with SONOFF TH Origin and TH Elite relays.

Waterproof and durable design

The probe is designed for humid environments and resists corrosion and rust. Ideal for basements, greenhouses, utility rooms, and aquariums.

Accurate measurement across a wide range

Measures from -40 to 115 °C with ±0.5 °C accuracy within -10 to 85 °C. You get stable, reliable data for automations.

Easy RJ9 (4P4C) installation and 1.5 m cable

Plug directly into SONOFF TH Origin/Elite and place the probe exactly where it measures best—thanks to the long cable, with no compromises.

Make your smart home even smarter. The SONOFF waterproof temperature sensor works reliably even in humid environments, and thanks to its stainless steel probe and high-quality insulation it resists corrosion and rust. The wide -40 to 115 °C measuring range and high accuracy make it an ideal choice for monitoring boiler rooms, greenhouses, aquariums, utility rooms, and outdoor areas.

Installation takes just a moment—simply connect it to the SONOFF TH Origin (THR316) or TH Elite (THR320) relay. The long 1.5 m cable lets you reach the ideal measuring spot while keeping wiring neat and safe. The sensor is built for harsh conditions yet delivers stable, accurate data for automations and notifications.