THR316D/THR320D

Product Overview

Introduction

Product Name	SONOFF TH Elite Smart Temperature and Humidity Monitoring Switch
Product Model	THR316D; THR320D

SONOFF TH Elite is a smart temperature and humidity monitoring switch designed for high-load electrical control and real-time environmental data tracking. Equipped with a dry contact output and supporting a maximum load of 16A/20A, TH Elite is ideal for controlling boilers, HVAC equipment, and other non-voltage input systems in residential, agricultural, or industrial settings. It features an integrated LCD display for instant temperature and humidity readings, updated every 5 seconds. When paired with a compatible sensor (WTS01, MS01, THS01), the device enables remote monitoring, historical data logging (up to 6 months), and intelligent automation based on environmental conditions. It is an all-in-one solution for precise environmental automation and high-power smart switching.

Highlights

20A Heavy-Duty Control + Dry Contact Output – Built for HVAC & Industrial Use

Handles up to 20A high load and features dry contact output, making it perfect for controlling boilers, HVAC systems, industrial relays, or non-voltage input equipment. Whether at home or in commercial settings, enjoy reliable performance and broad compatibility.

Real-Time Temp & Humidity on LCD – No App Needed

Stay informed at a glance. The integrated LCD screen refreshes every 5 seconds, displaying live temperature and humidity readings—perfect for quick checks without opening the app.

6-Month Climate History – Hourly Precision & Export-Ready

Track your environment like a pro. Log temperature and humidity data for up to 6 months, accurate hour by hour. View trends by hour, day, or month, and export to Excel (.xlsx) for easy analysis—ideal for smart climate control in homes, greenhouses, or server rooms.

Smart Scheduling for Climate Automation – 24/7 Comfort, Less Waste

Program up to 8 smart schedules triggered by temperature, humidity, or time. Automatically power devices on or off to save energy while maintaining the perfect indoor environment all day long.

Voice Control & Instant Queries – Works with Alexa & Google Assistant

Ask and get answers. Use voice commands to check temperature or humidity, or to control devices—hands-free. Enjoy seamless smart home integration with Amazon Alexa and Google Assistant.

etc...

Applications

Boiler & HVAC System Automation

With up to 16A/20A load support and dry contact output, TH Elite is ideal for controlling heating systems, furnaces, air handlers, or non-voltage input HVAC equipment—automatically turning on/off based on temperature or humidity thresholds.

Greenhouse Environmental Management

Ensure stable growing conditions by linking TH Elite with fans, misting systems, or heating units. Real-time and historical data help fine-tune automation for optimized plant health.

Industrial Equipment Control with Environmental Triggers

Ideal for smart automation of temperature-sensitive machinery, such as ventilation fans in server rooms, dehumidifiers in storage areas, or climate control in workshops.

Smart Farming & Livestock Applications

Monitor and control temperature and humidity for poultry houses, barns, or irrigation systems—enhancing animal welfare and reducing manual labor.

Aquarium or Reptile Enclosure Management

Maintain stable climate conditions for aquatic life or terrariums. Use the LCD screen to instantly verify conditions and automate heating or humidification based on real-time data.

On-Site Display + Remote Control

Built-in LCD display updates every 5 seconds for immediate status visibility—useful in environments where on-device feedback is essential (e.g., greenhouses, plant rooms, warehouses).

Specification

Model	THR316D	THR320D
Input	100-240V~,50/60Hz MAX 16A	100-240V~,50/60Hz MAX 20A
Output	100-240V~,50/60Hz MAX 16A	100-240V~,50/60Hz MAX 20A
Dry contact output	5-30V, 1AMax
Wi-Fi	IEEE802.11b/g/n 2.4GHz
LCD Screen Size	43x33mm
App supported systems	Android & iOS
Operating temps	-10℃~40℃
Working humidity	5%~95% RH, non-condensing
Shell material	PC V0
Dimension	98x54x31mm
High-voltage connector wire	1.0mm² to 4.0mm²	1.5mm² to 6.0mm²
Rated impulse voltage	2500V
Remark	External preliminary protection with Max. C20A circuit breaker in the supply line is required under all circumstances.

eWeLink Key Features

Device Home Page Functions
Key Features		Feature Description
On / Off		Device on/off state.
Auto Mode	Enable/Disable	Automatically control channel switching based on preset temperature or humidity thresholds.
	Auto mode Schedule Setting	Control by Temp./Humidity Temp. Higher than/Humidity Higher than Temp. Lower than/Humidity Higher than Effective Period State after Effective period Ends
Current Temperature and Humidity Values		Current temperature and humidity values monitoring.
Temperature and Humidity History		Tracks day/last 7D/month/half-year temperature and humidity history. Supports viewing & exporting 6-month historical temperature and humidity records.
Schedule		Set the device to complete the specified action at the specified time.
Timer		Set delayed actions for the device to execute after a specified time
Loop Timer		The device executes a predefined action cyclically at specified time intervals.

Device Settings
Key Features		Feature Description
Third-party Platforms	Alexa	You can control your smart devices through third-party services, including voice control.
	Google Home
	IFTTT
	SmartThings
	Alice
Assign location		Set up the home and room where the device is located.
Share		The device can be shared with other eweLink accounts.
Create Group		After multiple devices are created into a group, you can synchronize all devices in the group.
Smart Scene	Trigger Condition	Temperature ≥ /Temperature ≤ Humidity ≥ /Humidity ≤ Switch On/Off Temp. difference settings Hum. difference settings
	Execution Action	On/Off/Reverse
LAN Control		A control method where the app communicates directly with the device over the same router, without going through the cloud platform. On/Off
Push Notice		After turning on "Push notifications", also make sure to grant notification permissions in Phone Settings > Permissions for the eWeLink app. This allows you to receive push notifications when the device status changes. On/Off Temperature ≥ Temperature ≤ Humidity ≥ Humidity ≤
Offline Alert		Turn on the "Offline Notifications" feature, and grant eWeLink notification permissions in Phone Settings > Permissions. You will receive a mobile push notification 5 minutes after the device goes offline. On/Off
Logs		Records of device status changes. (You can view the operation records of the past three months)
Network Indicator		On/Off
Power-on State		The switch state of the device when power is restored after a power outage. On/Off/Last State
Temperature Unit		Fahrenheit Celsius
Wi-Fi Settings		Configure the WiFi network connected to the device.
Calibration		Temperature Calibration Humidity Calibration
Delete Device		Remove the device from the eWeLink platform.

Installation and Configuration Guide

① Button

Button	Description
Press & hold 5 seconds	Device enters the pairing mode
Single press	Turn on/off the device
Double press	Auto mode enable/disable

② LCD Screen

③ Protective cover

④ Sensor interface

⑤ Dry contact interface

⑥ Power LED indicator (Red)

Power LED indicator (Red)	Description
Keeps on	Device is on
Keeps off	Device is off

⑦ Wi-Fi LED indicator (Blue)

Wi-Fi LED indicator (Blue)	Description
Keeps on	Online
Flashes two short + one long	In Pairing Mode
Flashes once	Failed to connect to the router
Flashes twice	Connected to the router but failed to connect to the server
Flashes three times	OTA

⑧ Auto mode LED indicator (Green)

Auto mode LED indicator (Green)	Description
Keeps on	Auto mode is on
Keeps off	Auto mode is off

⑨ Mounting base

⑩ Wiring terminals (Visible after removing the protective cover)

Terminals	Description
L Out	Live (Output Terminal)
L In	Live (Input Terminal)
N	Neutral
N	Neutral

Wiring Diagrams

WARNING:

Please install and maintain the device by a professional electrician. To avoid electric shock hazard, do not operate any connection or contact the terminal connector while the device is powered on!
Make sure all wires are connected correctly.

1. Remove protective cover.

2. Wiring.

3. Rail Installation.

4. Insert the sensor.

5. Wiring method of dry contact.

Notice:

Compatible SONOFF sensors: WTS01, MS01, THS01.
Compatible sensor extension cables: RL560.
Some old version sensors need to be used with the accompanying adapter.
Press the white button on the top of the wire connecting hole to insert the corresponding wire, then release.
Dry contact wire conductors size: 0.13- 0.5 mm², wire stripping length: 9- 10 mm.

Add Device

Open eWeLink, tap "+” and select "Add Device", then follow the prompt on the App.

Notice：

It's required to turn on the Bluetooth on your Phone when adding a device.
After powering on, the device will enter the Bluetooth pairing mode during the first use.
The Wi-Fi LED indicator changes in a cycle of two short and one long flash and release.
The device will exit the Bluetooth pairing mode if not paired within 3 minutes. If you want to enter this mode, please long-press the manual button for about 5s until the Wi-Fi LED indicator changes in a cycle of two short and one long flash and release.

FAQ

1. What sensors are compatible with the SONOFF TH Elite?

TH Elite supports THS01 (temperature & humidity sensor), WTS01/DS18B20 (temperature sensor), and MS01 (soil moisture sensor). Only one sensor can be connected at a time.

2. Can I check the temperature and humidity history?

Yes. The eWeLink app stores up to 6 months of hourly temperature and humidity data, which can be exported as an Excel file for analysis.

3. Does TH Elite support automation based on temperature or humidity?

Yes. You can create smart scenes or schedules that automatically control appliances when temperature or humidity reaches a certain value.

4. Can I use TH Elite with voice assistants?

Yes. TH Elite supports Amazon Alexa and Google Assistant, allowing for voice-based device control and environmental queries.

5. Is the dry contact output consistent with that of a standard relay?

Yes, the dry contact output behaves like a standard relay with three terminals:

NC (Normally Closed)
NO (Normally Open)
COM (Common)

When the relay is off, the circuit between NO and COM is open, so any load connected here will also be off, in sync with the relay.

Conversely, the circuit between NC and COM is closed when the relay is off, meaning the load connected here will be on. When the relay switches on, the behavior reverses.