# DHI-ARA11-W2 (433 MHz) Wireless door detector

> The Dahua DHI-ARA11-W2 Wireless Door Detector is a compact sensor that triggers an alarm whenever an armed door or window is opened. It supports two-way communication, frequency hopping, and AES128 encryption, and can display the open/close state on the DMSS App in real-time. Ideal for villas, shops, apartments, and indoor security systems.

- Price: KSh 2,500 (excluding 16% VAT)
- Availability: In stock
- Brand: Dahua
- Seller: Secom World, Nairobi (+254724037449)
- Updated: 2026-11-02
- URL: https://secomworld.co.ke/product/dh-ard323-w2-door-detector-wl/

## Specifications
| Feature | Detail |
|---|---|
| Sensor type | Reed switch |
| Communication distance | up to 1,000 m (open area) |
| Long battery life | 2–4 years depending on configuration |
| Carrier Frequency | 433.1–434.6 MHz |
| Power Supply | CR123A battery |
| Power Consumption | Max 70 mW |
| Operating Temp | –10 °C to +55 °C |
| Operating Humidity | 10–90 % RH |
| Dimensions | 100.2 × 20.8 × 20.3 mm |
| Weight | 70 g (net), 115 g (gross) |
| Installation | Bracket mount |
| Casing Material | PC + ABS |
| Battery Life | 4 years (NO type), 2 years (NC or Pulse type) |
| Temperature Measuring Range | –15 °C to +65 °C |
| Precision | ±1 °C |
| Resolution | 1 °C |
| Movement Detection Distance | < 40 mm |

## Description
The **Dahua Wireless Door Detector** combines a sensor and a magnet to monitor doors and windows. When armed, opening a door immediately triggers an alarm, and the system sends **real-time notifications** to the **DMSS App**, keeping users informed from anywhere.


Equipped with a **tamper alarm, low battery warning, and test mode**, this device ensures continuous, secure operation. **Cloud update support** allows for easy firmware upgrades, and the **PC + ABS casing** provides durability while remaining lightweight. It’s suitable for **non-metal doors**, with a detection distance of less than 40 mm (1.57″).

### About this product

The DHI-ARA11-W2 (433 MHz) Wireless door detector is a security alarm system device from Dahua. It works as part of an alarm system, helping to detect intrusions and alert you to them.

### What to check before you buy

Before buying, check that it is compatible with the alarm panel or hub you use, and whether your system is wired or wireless. Plan which doors, windows and rooms need cover, and test the signal range in your building, because walls and distance affect wireless parts. 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-ARA11-W2 (433 MHz) Wireless door detector used for?
The DHI-ARA11-W2 (433 MHz) Wireless door detector is a security alarm system device from Dahua. It works as part of an alarm system, helping to detect intrusions and alert you to them.

### What are the main specifications of the DHI-ARA11-W2 (433 MHz) Wireless door detector?
Sensor type: Reed switch; Communication distance: up to 1,000 m (open area); Long battery life: 2–4 years depending on configuration; Carrier Frequency: 433.1–434.6 MHz; Power Supply: CR123A battery. See the full details on this page, or ask us to confirm anything specific.

### Will this work with my alarm system?
Check that it is compatible with your panel or hub, and whether your system is wired or wireless. Send us your panel model and we will confirm.

### Where can I buy the DHI-ARA11-W2 (433 MHz) Wireless door detector 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-ARA11-W2 (433 MHz) Wireless door detector?
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.