Dahua DHI-ARD2231-W2(868)-B-Black - Wireless PIR & Microwave Dual-Tech Motion Detector
Product Features
- Dual-tech PIR and microwave detection with automatic temperature compensation, reducing false alarms caused by thermal interference
- Pet immunity up to 18 kg (39.68 lb), height under 50 cm
- 868 MHz wireless with two-way communication, AES128 encryption and frequency hopping
- Up to 1,600 m communication range in open space
- Powered by a single CR123A battery, rated up to 3 years' life
Dahua DHI-ARD2231-W2(868)-B-Black — Wireless PIR & Microwave Dual-Tech Motion Detector
The Dahua DHI-ARD2231-W2(868)-B-Black is a wireless dual-tech motion detector that combines passive infrared (PIR) and microwave sensing with automatic temperature compensation, reducing false detections caused by thermal interference. Frequency hopping and two-way communication help keep the wireless link stable.
Who is it for?
This detector pairs with a compatible Dahua wireless alarm hub to provide wireless intrusion detection for homes and small commercial premises. Its pet immunity function, rated to 18 kg and under 50 cm in height, makes it suitable for rooms where pets have access, and 3-level adjustable sensitivity lets installers tune it to the space.
Key specification
| Detection Mode | PIR + Microwave |
|---|---|
| Sensor | Dual-element low-noise PIR sensor, microwave sensor |
| Detection Range | 12 m (39.37 ft) (90°) at 2.2 m installation height |
| Sensitivity | 3 levels adjustable |
| Pet Immunity Level | ≤ 18 kg (39.68 lb), height < 50 cm (19.68 in) |
| Microwave Frequency | 24 GHz |
| White Light Resistance Level | 2000 lux |
| Carrier Frequency | 868.0 MHz–868.6 MHz |
| Communication Mechanism | Two-way |
| Communication Distance | Up to 1,600 m (5,249.34 ft) in an open space |
| Encryption Mode | AES128 |
| Frequency Hopping | Yes |
| Power Supply | CR123A × 1 |
| Battery Life | Up to 3 years (10 triggers/day at 70% battery efficiency) |
| Tamper | Yes |
| Low Battery Detection | Yes |
| Casing Material | PC + ABS |
| Net Weight | 106 g (0.23 lb) |
What you will need
- A compatible Dahua wireless alarm hub/panel (868 MHz) — this detector communicates wirelessly and needs a compatible hub to function as part of an alarm system
- 1 x CR123A battery (power supply) — rated for up to 3 years' typical use
Frequently asked questions
What frequency does this detector use?
It operates on the 868 MHz wireless band (868.0–868.6 MHz) with two-way communication and AES128 encryption, plus frequency hopping for a stable connection.
Will it false-alarm because of pets?
No — it has a pet immunity function for animals up to 18 kg (39.68 lb) and under 50 cm in height.
How is it powered, and how long does the battery last?
It runs on a single CR123A battery, rated for up to 3 years based on 10 triggers a day at 70% battery efficiency.
Does it work on its own, or does it need a panel?
It's a wireless sensor, not a standalone device — it needs to be paired with a compatible Dahua wireless alarm hub/panel to trigger alarms and be monitored.
Browse the full Dahua range, explore our Intruder alarms category, or Contact us on 01902 902251. Trade and retail customers are welcome at our Wolverhampton trade counter.
| Product Code | DHI-ARD2231-W2(868)-B-Black |
|---|---|
| Type/Format | PIR/Pet |
| Manufacturer | Dahua |
| Colour | Brown |
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