# Carbon monoxide (CO) gas detector FireAngel FA3820-EUX10 — electrochemical, battery 3V, surface-mounted, ABS housing, 125×67×33 mm

**URL:** https://aio.lv/en/product--inne-fa3820-eu--12097007
**Data updated:** 2026-03-14 12:33 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** INNE
**Manufacturer code:** FA3820-EU
**EAN:** 816317006020
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 50.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 41.73 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--inne-fa3820-eu--12097007

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.07.2026 | free |
| Pickup points | 15.07.2026 | 1.99 EUR |
| Courier delivery to door | 15.07.2026 | 4.99 EUR |

## Summary description

FireAngel FA3820-EUX10 is a surface-mounted carbon monoxide (CO) gas detector with an electrochemical sensor designed for home use. It runs on a 3 V lithium battery, has an ABS housing in white, and measures 125 × 67 × 33 mm. The unit monitors CO levels and provides audible alerts to warn occupants of dangerous concentrations.

## Long description

The FireAngel FA3820-EUX10 is a surface-mounted carbon monoxide (CO) gas detector designed for domestic environments. It uses an electrochemical sensor to monitor ambient CO concentration and provides audible and visual alerts when dangerous levels are detected. The unit is powered by a 3 V lithium battery, housed in a white ABS enclosure and measures 125 × 67 × 33 mm. The detector includes features such as a ventilate pre‑alarm, a sleep‑easy silencing function for battery alerts, and an intelligent sensitivity mode for fast reaction to rising CO levels.
Advantages
This CO detector employs an advanced electrochemical sensor calibrated and tested specifically for CO gas, ensuring accurate and stable detection. The ventilate pre‑alarm reduces the risk of CO build‑up by prompting occupants to ventilate early. Audible and prominent visual notifications provide clear warning in hazardous situations, while the sleep‑easy function allows temporary silencing of battery alerts for eight hours to prevent nuisance noise during replacement. The device also includes quiet test and memory functions and supports advanced diagnostics via a cable connection.
Suitable for
Residential homes and apartments where fixed surface‑mounted CO monitoring is required
Bedrooms, living rooms, corridors and other indoor spaces near fuel‑burning appliances
Replacement of end‑of‑life CO‑9X alarms to maintain continuous CO protection
Key specifications
Detection technology: electrochemical CO sensor
Power source: 3 V lithium battery
Housing material and colour: ABS, white
Mounting type: surface‑mounted
Dimensions: 125 × 67 × 33 mm
Audible alarm: clear loud alert with prominent visual notification
Functions: ventilate pre‑alarm, sleep‑easy silencing for battery alerts, quiet test, memory of previous alarm
Sensitivity: intelligent algorithm that increases sensitivity when low level CO is detected to enable faster alerts
How to use
Install the detector on a wall or ceiling at the recommended height and location, away from direct drafts, windows and heat sources. Insert the supplied 3 V lithium battery and perform a test using the test/silence control to confirm audible and visual indicators function correctly. Maintain the detector by following routine tests and replacing the battery as indicated by the unit. If the ventilate pre‑alarm sounds, open windows and doors to ventilate the area and monitor the detector for any change; if the full alarm activates, leave the premises immediately and seek fresh air.
Usage recommendations
Position the detector in rooms containing fuel‑burning appliances or sleeping areas, check operation regularly using the quiet test function, respond promptly to pre‑alarm ventilate warnings, and replace batteries or the unit according to manufacturer guidance to ensure continuous protection.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.095 kg |
| Certification | BS EN 50291-1:2018, BS EN 50291-2:2019 |
| Battery technology | Lithium |
| Operating relative humidity (H-H) | 30 - 90 |
| Storage temperature (T-T) | -20 - 50 |
| Operating temperature (T-T) | -10 - 40 |
| Storage relative humidity (H-H) | 30 - 90 |
| Alarm decibels | 85 dB |
| Height | 67 mm |
| LED indicators | Y |
| Width | 125 mm |
| Depth | 33 mm |
| Connectivity technology | Wireless |
| Product colour | White |
| Battery life | 10 year(s) |
| Manual | Yes |
| Battery voltage | 3 V |
| Housing material | Acrylonitrile butadiene styrene (ABS) |
| Mounting type | Surface-mounted |
| Detector type | Electrochemical detector |
| Power source type | DC, Battery |
| Test button | Yes |
| Quantity per pack | 1 pc(s) |
| Best uses | Home |
| Detected gas types | Carbon monoxide (CO) |
| Alarm mute | Yes |
| Sustainability compliance | Yes |
| Warranty period | 5 year(s) |
| Compliance certificates | WEEE, UKCA, CE |

## FAQ

### How much does the FireAngel FA3820-EUX10 CO gas detector cost, and is it available for purchase?

The price is 50.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 10.07.2026 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 INNE 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 INNE 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

### Where can I download the instructions for FireAngel FA3820-EUX10 CO gas detector?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/12097007/67630624_large.webp