# DHI-HY-SA40A WIRELESS SMOKE ALARM

> The Dahua DHI-HY-SA40A Standalone Smoke Alarm uses advanced split-spectrum photoelectric sensing to detect smoke quickly and accurately. It features a loud 85 dB alarm, visual LED alerts, test & silence button, and a sealed 10-year lithium battery for maintenance-free indoor fire protection—ideal for homes, apartments, and dormitories.

- Price: KSh 1,500 (excluding 16% VAT)
- Availability: In stock
- Brand: Dahua
- Seller: Secom World, Nairobi (+254724037449)
- Updated: 2026-11-02
- URL: https://secomworld.co.ke/product/dhi-hy-sa40a-wireless-smoke-alarm/

## Specifications
| Feature | Detail |
|---|---|
| Model | DHI-HY-SA40A |
| Detection Type | Smoke |
| Sensor Type | Photoelectric |
| Alarm Volume | 85 dB(A) at 3 m |
| Alarm Modes | Smoke alarm, fault warning, low-battery warning |
| Silence Duration | 9 minutes |
| Power Supply | 3 V CR123A lithium battery (sealed, non-replaceable) |
| Battery Life | Up to 10 years |
| Coverage Area | 20–40 m² (ceiling height < 8 m) |
| Operating Temperature | –10 °C to +55 °C |
| Material | PC + ABS |
| Color | White |
| Installation | Ceiling mount |
| Weight | 110 g |
| Standby | Green LED flashes once per minute |
| Alarm | Red LED flashes once per second |
| Fault | Red LED flashes twice per minute |

## Description
The **Dahua DHI-HY-SA40A Standalone Smoke Alarm** is a reliable indoor safety device designed to continuously monitor smoke concentration and provide **early fire warning**. Using advanced **split-spectrum photoelectric sensor technology**, it delivers fast response, stable performance, and **very low false alarms**.


Equipped with a **high-volume built-in buzzer (85 dB at 3 meters)** and clear LED indicators, the alarm instantly alerts occupants through **visual and audible warnings** when smoke levels reach the alarm threshold. A **sealed 10-year lithium battery** ensures long-term, maintenance-free operation, making it ideal for homes, apartments, dormitories, and offices.

### About this product

The DHI-HY-SA40A WIRELESS SMOKE ALARM is a fire or safety system device from Dahua. It forms part of a system that warns people early about danger, which gives them more time to respond.

### What to check before you buy

Placement matters: follow the manufacturer's guidance and any building requirements for your premises. Where the device connects to a panel, check that it is compatible with the panel you use. Test the system regularly, and replace batteries on schedule, so that it works when it is really needed. Secom World can supply and install it for you, so ask us to look at your site if you would like advice on the setup.

### Buying from Secom World

Our shop is at Montana Mall, Ground Floor, Shop No. 11, Nairobi, open Monday to Saturday, 8:00am to 6:00pm. You can collect the same day, get delivery in Nairobi the same or next working day, or use our countrywide courier, which takes 1 to 3 working days. Call or WhatsApp 0724 037 449 for stock, advice or a quote.

## FAQs
### What is the DHI-HY-SA40A WIRELESS SMOKE ALARM used for?
The DHI-HY-SA40A WIRELESS SMOKE ALARM is a fire or safety system device from Dahua. It forms part of a system that warns people early about danger, which gives them more time to respond.

### What are the main specifications of the DHI-HY-SA40A WIRELESS SMOKE ALARM?
Model: DHI-HY-SA40A; Detection Type: Smoke; Sensor Type: Photoelectric; Alarm Volume: 85 dB(A) at 3 m; Alarm Modes: Smoke alarm, fault warning, low-battery warning. See the full details on this page, or ask us to confirm anything specific.

### How often should I test safety alarms?
Test them regularly and follow the manufacturer's guidance. Replace batteries on schedule so the system works when needed.

### Where can I buy the DHI-HY-SA40A WIRELESS SMOKE ALARM in Kenya?
You can buy it at Secom World, Montana Mall, Ground Floor, Shop No. 11, Nairobi, or order on this page. Collection is the same day, Nairobi delivery the same or next working day, and countrywide courier takes 1 to 3 working days.

### Can Secom World install the DHI-HY-SA40A WIRELESS SMOKE ALARM?
Yes. Secom World supplies and installs security systems for homes and businesses across Kenya. Call or WhatsApp 0724 037 449 to arrange a site visit or a quote.