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Sonoff TH16 Elite (R3) WiFi smart relay (230V/16A and NO/NC dry contact) with sensor input and LCD screen (THR316D)

Sonoff THR316D is the 16A version of the new TH R3 Elite product, which is the new 2022 version of the Sonoff TH10/TH16 Wi-Fi smart relay series.

It supports both 230V (max. 16A) switching and dry contact NO/NC switching, it can be controlled remotely from a mobile phone via the Internet and can be set for scheduled switching. You may connect temperature and humidity sensor or soil moisture sensor to it, and sensor data based automatic on/off switching and notifications can also be set.

The LCD display of the Elite version also shows the measured data on the screen, updated every 5 seconds. It also records the measured data in the cloud, and 6 months of historical sensor data can be seen as a graph in the app and on the eWeLink web UI.

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Factory SKU ID:
Supported protocols:
in stock (30+ pcs)

The Sonoff THR316D is the new R3 version of the Sonoff TH smart relay family. The THR316D is a WiFi enabled, remote-controllable smart relay that can be remotely controlled from a mobile phone via the internet. However, the new model is not only capable of 230V (max. 16A) switching, but also voltage-free switching. Also thermometer, humidity sensor and soil moisture sensor can be connected to THR316D, and can also be controlled automatically based on measured temperature/humidity/soil moisture data. Instead of the jack plug connector of the previous R2 version, the R3 version is now equipped with an RJ9 connector socket. The Elite version has an LED display which also shows the measured data on the screen, updated every 5 seconds. One of the new features of the R3 version is that the measured data is uploaded in the cloud and the app can also display a historical data from the previous 6 months.


Compatible with the following sensors:

  • Sonoff THS01 temperature and humidity sensor (suggested);
  • Sonoff SI7021 temperature and humidity sensor; 
  • Sonoff AM2301 temperature and humidity sensor; 
  • Sonoff DS18B20 temperature sensor (waterproof);
  • Sonoff MS01 soil moisture sensor. 

Operating modes can be set in the eWeLink app:

  • Manual: the device can be switched on/off from the eWeLink app by the user manually
  • Automatic: temperature/humidity/soil moisture (only one can work at a time) values can be set for multiple times of day and periods and the relay status will change accordingly based on the set values

The THR16D is able to send a push notification if the relay status changes or the measured value is below/above the set limit.

The THR316D is the new R3 version that also switches the 230V it receives for operation through the 230V output at the bottom of the relay, and also switches the voltage-free NO/NC outputs at the top of the relay:

  • When the relay state is OFF: the 230V phase output is OFF, and the COM-NC inputs are connected.
  • When the relay state is ON: the 230V phase output is ON (230V, max. 16A) and the COM-NO inputs are connected.


  • humidification or dehumidification control
  • fan control
  • socket control
  • electric floor and other heater automation
  • pool pump control
  • jakuzzi automation
  • irrigation control

DIN rail mountable

The Sonoff THR316D has a DIN rail adapter for mounting the product in an electric distribution box.

No hub required

Sonoff Wi-Fi devices can be controlled directly and without a hub through your smartphone with eWeLink App.
Manage and control the all smart devices in your home, set quick profiles, scenes, schedules, and adjust settings wherever you are through the Cloud access.


  • Working on 2.4 GHz Wi-Fi network
  • Now, add device fast and easy via Bluetooth connection, using eWeLink App

Product features:

  • LED Display – Shows the measured data on the screen, updated every 5 seconds
  • Outputs – This modell is not only capable of 230V (max. 16A) switching, but also of voltage-free switching (on separate terminals).
  • Status check – The mobile App shows the current status of the relay (on or off);
  • Remote ON / OFF – Anytime, anywhere, from now on you can turn all your appliances on and off remotely.
  • Data history – Half a year of measurements are displayed in the mobile App in a graph;
  • Timer – Various timer functions: single time, scheduled turn on/off, countdown/timer.
  • Real-time temperature and humidity display (in app) – When THS01 or SI7021 temperature and humidity sensor is connected
  • Real-time temperature display (in app) – When adding DS18B20 waterproof thermometer
  • Real-time soil moisture display (in app) – When soil moisture sensor MS01 is connected
  • Momentary switching mode (inching) – Typically for 0,5 or 1 second
  • Share control – Control the device together with your family
  • Groups, rooms – Organise your Sonoff and SmartWise smart devices into groups and rooms in the eWeLink app
  • Smart Control (Scene) – You can also use the Smart Control / Scene eWeLink app feature to create conditional controls between different Sonoff / SmartWise devices. For example, triggered ON/OFF by temp, hum or other environmental sensors
  • Compatibility – Works perfectly with Amazon Alexa, Google Assistant, IFTTT and Google Nest
  • Sonoff and its sister brand SmartWise devices are compatible with each other, both using the eWeLink factory app

Product type:
smart WiFi relay compatible with sensors
Device power supply:
100V-240V AC
230V AC (live and neutral)
DIN rail compatible:
Embedded relay:
Dimmer feature:
Power consumption metering:
Number of gangs / circuits:
NO/NC switch:
yes, dry contact NO/NC output
Rated voltage (output):
100V-240V AC, dry contact NO/NC
Rated current (output):
Physical on/off button on device:
External switch supported:
2-way or 3-way switching:
Momentary switching (inching):
Surge protection:
Overload protection:
Overheat protection:
Wi-Fi standards:
802.11 b/g/n (2.4GHz)
RF transmitter / receiver:
Bluetooth pairing with phone
Controllable from internet:
Manufacturer smartphone app:
yes, free app: eWeLink (Android, iOS)
Web admin interface:
on/off mode (only with subscription, Premium feature)
Voice control:
Amazon Alexa and Google Assistant compatible
Cloud mode:
default mode is connecting to the eWeLink cloud
LAN mode:
yes, if the connection with the eWeLink cloud is disconnected, limited features
REST API support:
MQTT support:
Supported integrations:
Amazon Echo, Echo Dot, Amazon Tap, Google Home, Google Nest, IFTTT (IFTTT integration with subscription, Premium feature), REST API
Schedulers, timers:
yes, 8 timings on the device in offline mode, (loop control supported), any further timing can be run from the cloud in online mode
Notification functions:
eWeLink app notification on smartphone for on/off, or for temperature threshold
temperature data also logged to the cloud, yes: on/off history in the app
150 g/pcs
Package offers
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Sonoff TH16 Elite (R3) WiFi smart relay (230V/16A and NO/NC dry contact) with sensor input and LCD screen (THR316D)
Sonoff TH16 Elite (R3) WiFi smart relay (230V/16A and NO/NC dry contact) with sensor input and LCD screen (THR316D)