# Temperature and humidity controller Sonoff THR320 20A DIN — Wi‑Fi smart relay for HVAC and automation

**URL:** https://aio.lv/en/product--sonoff-sonoff-thr320--5648050
**Data updated:** 2025-12-30 05:59 (EET)
**Category:** Other goods
**Manufacturer:** Sonoff
**Manufacturer code:** SONOFF-THR320
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 23.00 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 19.01 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonoff-sonoff-thr320--5648050

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Thursday | free |
| Pickup points | 07.07.2026 | 1.89 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Sonoff THR320 is a Wi‑Fi temperature and humidity controller with a 20A DIN‑rail mounted relay for integration into HVAC and home automation systems. It monitors environmental conditions and switches load devices via Wi‑Fi using temperature/humidity thresholds or schedules. Suitable for boilers, heaters, fans, humidifiers and remote control through Sonoff app or compatible automation platforms.

## Long description

Sonoff THR320 is a Wi‑Fi temperature and humidity controller with a DIN‑rail 20A relay designed for HVAC and home automation. It converts a traditional thermostat into a smart controller within minutes, monitors temperature and humidity, supports LAN operation so works when Wi‑Fi is offline, and records up to six months of hourly history that can be exported in .xlsx format. The unit uses a V0 flame‑retardant PC casing and includes surge protection with a varistor to absorb peak voltages.
Advantages
The device supports multiple sensor types (temperature & humidity, waterproof temperature, and soil moisture) with an upgraded RJ9 4P4C hot‑pluggable connector for stable connections. It provides reliable local control even without cloud access, timely push notifications when thresholds or device states change, scene automation via eWeLink and IFTTT, Home Assistant integration through the eWeLink add‑on, and voice control compatibility. The relay supports up to 20A for higher load devices such as electric floor heating.
Suitable for
HVAC systems and boiler or heater control
Electric floor heating and other high‑load appliances (up to 20A)
Greenhouse or plant irrigation automation using soil moisture sensors
Fish tanks or aquariums using waterproof temperature sensors
Nurseries or baby rooms requiring temperature and humidity monitoring
Key specifications
Input/output: 100–240 V AC, 50/60 Hz, 20 A max
Casing material: PC, V0 flame‑retardant
Wi‑Fi: IEEE 802.11 b/g/n, 2.4 GHz
Mounting: DIN‑rail or panel
Measurements: 98 mm × 54 mm × (depth unspecified)
Sensor connector: RJ9 4P4C (hot‑pluggable)
Data history: up to 6 months, exportable to .xlsx, hourly accuracy
How to use
Mount the Sonoff THR320 onto a DIN rail or panel and connect mains power (100–240 V AC). Attach the appropriate sensor (temp & humi, waterproof temp, or soil moisture) to the RJ9 4P4C port. Configure thresholds, schedules and notifications in the eWeLink app or via the web control. For local reliability enable LAN control so the relay continues operating when Wi‑Fi is unavailable. Optionally add the device to IFTTT or Home Assistant for cross‑brand automation and link with voice assistants for voice control.
Usage recommendations
Use sensors appropriate to the environment (waterproof sensor for aquariums, soil moisture for plants). Ensure wiring and connected loads do not exceed the 20A rating. Install the controller in a dry, ventilated electrical enclosure and follow local electrical codes when connecting mains power. Export history data periodically if you need long‑term records.

## FAQ

### How much does the Sonoff THR320 20A DIN temperature & humidity controller cost, and is it available for purchase?

The price is 23.00 € (valid at the time of publication and already includes all taxes). The item is available for order — 11 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on Thursday at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Sonoff products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Sonoff service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/5648050/43762513_large.webp