This cable extends the reach of Sonoff temperature and humidity sensors, allowing you to place the sensor probe further from the main TH Elite or TH Origin unit.
Sonoff Sensor Extension Cable
Extend the cable of your temperature sensor by 5 meters — place the sensor where you need it, not where the switch is.
5 $
Available
Good to know
- Does not work on its own — extends the cable between a Sonoff TH Elite or Sonoff TH Origin and a compatible Sonoff TH sensor.
- Useful when the switch is inside a wall box and the sensor needs to reach a water tank or pool at a distance.
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Product Information
Sonoff Sensor Extension Cable (RJ9)
Need to place your sensor farther from the TH Elite or TH Origin? This 5-meter extension cable gives you the extra reach. It uses an RJ9 connector (like a phone cable) and works with all Sonoff TH-compatible sensors.
Key Features:
- 5-Meter Length: Extends the distance between your sensor and the TH Elite/Origin.
- Compatible Sensors: Works with the THS01 (temp & humidity), WTS01 (waterproof temp), and MS01 (soil moisture).
- Max Extension: THS01 and WTS01 can be extended up to 60 meters. MS01 (soil moisture) up to 10 meters.
- RJ9 Connector: Plug-and-play — just connect and it works.
💡 Pro Tip: If your water heater is in the bathroom but your electrical panel is in another room, use this cable to bridge the gap between the TH Elite and the waterproof temperature sensor.
Specifications
What's in the Box

Delivery, Returns & Warranty
Delivery
Enjoy free standard delivery across Lebanon on orders over $50, or free pickup on orders over $30. We also offer same-day delivery options. For more details, visit our delivery information page.
Returns
We provide a 15-day return window for all orders, subject to certain exclusions. Please note that cash refunds are not available. For complete details, visit our return policy page.
Warranty
Our products are warranted to be free from manufacturing defects. If a product sold by us is found to be defective, we will, at our discretion, repair or replace it with a new one. Certain exclusions apply. For full details, please review our warranty policy page.
Buying a gift? Select gift-wrap at checkout (extra cost).
Sonoff Sensor Extension Cable
Connect to extend the length of TH series sensors.

Check the product page for the exact cable length. It is designed to provide additional reach beyond the standard sensor cable.
It is compatible with the Sonoff Temperature Humidity Sensor, WTS01 Waterproof Temperature Sensor, and Soil Moisture Sensor.
This product comes with a 6-month warranty covering factory defects. If you experience any issues, contact Smartio within the warranty period.