# X-Sense FS121 Fire Alarm System with 100 dB Alarm and 50 m Range

**URL:** https://aio.lv/en/product--oem-o810194780028--12517517
**Data updated:** 2026-06-12 15:46 (EEST)
**Category:** Smart Sensors
**Manufacturer:** OEM
**Manufacturer code:** O810194780028
**EAN:** 0810194780028
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 245.99 €
**Prices and availability valid until:** 2026-08-01 23:59
**Price without VAT (21%):** 203.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--oem-o810194780028--12517517

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The X-Sense FS121 is a reliable fire alarm system designed for enhanced home safety. It features a powerful 100 dB alarm and a maximum operating range of 50 meters. The device is powered by both AC and a lithium battery, ensuring continuous protection. With its compact white design, it integrates seamlessly into any interior while providing essential fire detection capabilities for residential environments.

## Long description

The X-Sense FS121 Fire Alarm System is a robust safety solution engineered to provide reliable fire detection for residential properties. Featuring a powerful 100 dB alarm, this device ensures that occupants are alerted promptly in the event of smoke or fire. Its compact white design allows it to blend discreetly into various home interiors, while the dual power system, utilizing both AC and a lithium battery, guarantees continuous operation even during power outages.
Advantages
This fire alarm system offers significant peace of mind through its high-decibel output, which is designed to be audible throughout a standard home. The integration of a lithium battery backup ensures that the device remains functional during electrical failures, providing uninterrupted monitoring. Its compact dimensions and lightweight build make installation straightforward, while the 50-meter operating range provides extensive coverage for various room layouts.
Suitable for
Residential homes and apartments
Living rooms and bedrooms
Hallways and corridors
Home offices
This device may not be suitable for large industrial facilities or commercial warehouses where specialized, multi-zone fire suppression systems are required. It is also not intended for outdoor use or in environments with extreme humidity or temperatures that exceed the manufacturer's specified operating conditions.
Key specifications
Alarm volume: 100 dB
Maximum operating range: 50 m
Power source: AC and lithium battery
AC adapter output: 5 V, 1 A
Dimensions: 90 x 90 x 26.5 mm
Weight: 78 g
Color: White
How to use
To use the X-Sense FS121, mount the device in a central location on the ceiling or wall according to local fire safety regulations. Connect the unit to the provided AC adapter for primary power. Ensure the lithium battery is correctly installed to serve as a backup power source. Once powered, perform a test by pressing the test button to verify that the alarm sounds at the expected volume. Regularly check the device status to ensure it remains active and clear of dust or obstructions.
What to consider before purchase
Check your local building codes regarding fire alarm placement requirements.
Ensure you have a suitable power outlet nearby for the AC adapter.
Verify that the 50-meter range is sufficient for your specific floor plan.
Consider the number of units needed to cover all sleeping areas and common rooms.
Usage recommendations
Regularly test your fire alarm system at least once a month to ensure the sensor and alarm are functioning correctly. Keep the device free from dust and debris to prevent false alarms and maintain optimal sensitivity.

## Specifications

| Feature | Value |
|---|---|
| AC adapter output voltage | 5 |
| AC adapter output current | 1 A |
| AC adapter included | Yes |
| Alarm decibels | 100 dB |
| Maximum range | 50 m |
| Battery low indication | Yes |
| Power source type | Battery, AC |
| AC input frequency | 50/60 |
| AC input voltage | 100-240 |
| Test button | Yes |
| Central control unit operating temperature (T-T) | 4.4 - 37.8 |
| Central control unit operating relative humidity (H-H) | 0 - 85 |
| Central control unit dimensions (WxDxH) | 90 x 90 x 26.5 |
| Central control unit weight | 78 g |
| Carbon monoxide (CO) detector | Yes |
| Smoke detector | Yes |
| Emergency audible alarm unit | Yes |
| Fire alarm control unit | Yes |
| Number of smoke detectors | 12 |
| Battery voltage (detector) | 3 V |

### Features

| Feature | Value |
|---|---|
| Product colour | White |
| Number of devices supported | 50 |

### Battery

| Feature | Value |
|---|---|
| Battery technology | Lithium |

### Technical details

| Feature | Value |
|---|---|
| Compliance certificates | RoHS, CE |

### Packaging content

| Feature | Value |
|---|---|
| Batteries included | Yes |

## FAQ

### How much does the X-Sense FS121 Fire Alarm System cost, and is it available for purchase?

The price is 245.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 16.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can X-Sense FS121 Fire Alarm System be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 OEM 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 OEM 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 X-Sense FS121 Fire Alarm System?

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/12517517/68872488_large.webp