Frequently asked questions

• Does the THS01 work on its own?

  No. It is an accessory probe with no radio or battery: power and data run only through the RJ9 socket of a Sonoff TH Elite or TH Origin relay. Without the relay it neither measures nor shows up in the app.
• Which Sonoff devices is it compatible with?

  Officially with the RJ9-equipped TH-series relays: TH Elite (THR316D, THR320D) and TH Origin (THR316, THR320). Sonoff lists the THS01 among the series' supported sensors.
• Will it fit the older TH10/TH16?

  No — those use a 2.5 mm audio jack while the THS01 has an RJ9 4P4C plug. The old generation used Si7021/AM2301 sensors; the THS01 is the current RJ9-generation probe.
• How do I switch heating or a fan by threshold?

  Set auto mode on the TH relay in eWeLink: up to 8 programs by temperature, humidity and time. The relay turns the load — an incubator heater, a cellar fan — on or off when the THS01 reading crosses the threshold.
• Can the 50 cm cable be extended?

  Yes, with the RL560 extension cable (RJ9 on both ends): the THS01 can run up to 60 m away, so the relay sits in a garage while the probe hangs in a cellar or greenhouse.
• How is it different from the WTS01?

  The THS01 reads both temperature and humidity but has no declared water protection. The WTS01 is the series' sealed probe — temperature only, but it tolerates liquid contact. For misted incubators or liquids pick the WTS01.
• Where do I see the readings?

  In the eWeLink app, through the TH relay the probe is plugged into. The TH Elite also shows them on its own LCD, refreshed every 5 seconds, with an hourly history of up to 6 months.
• What is the THS01 measuring range?

  Temperature from −40 to +85 °C and humidity from 0 to 100% RH per the official spec. The manufacturer does not publish an accuracy figure for this model.