Dahua ARD2251E-W2 Wireless External Triple-Tech Detector
Protect outdoor areas before an intruder reaches the building with the Dahua ARD2251E-W2 Wireless External Triple-Tech Detector. Designed for compatible Dahua AirShield systems, it combines PIR, microwave and optical technology with intelligent detection algorithms for dependable perimeter protection in challenging environments.
Best for: Driveways, side access paths, courtyards, perimeter areas and other exposed locations requiring reliable outdoor motion detection.
Important: This is the detector-only model. The optional DHI-ARD1130-CAM infrared camera module is required to add visual alarm verification.
Accurate Outdoor Triple-Technology Detection
The ARD2251E-W2 uses PIR and 24 GHz microwave detection, supported by optical technology and intelligent algorithms, to identify human movement while reducing interference from small animals, temperature changes and variations in ambient light. Its 15-metre coverage and adjustable sensitivity make it suitable for residential and commercial perimeter protection.
Key Features
-
15-metre detection range: Covers a 90° detection angle when installed at the recommended height.
-
Pet immunity: Designed to reduce unwanted alarms from animals up to approximately 80 cm in height and 40 kg.
-
Three PIR sensitivity levels: Allows detection performance to be adjusted for the installation environment.
-
Anti-masking protection: Detects attempts to obstruct or cover the detector.
-
Movement and tamper detection: Provides alerts if the device is moved, detached or opened.
-
Temperature monitoring: Supports environmental temperature monitoring and digital temperature compensation.
-
IP66 weather protection: Suitable for indoor or outdoor installation in exposed areas.
-
Secure wireless communication: Uses AES128 encryption, two-way communication and frequency hopping.
-
Low-battery alerts: Helps maintain dependable system operation.
-
Remote firmware updates: Supports cloud updates with automatic recovery if an update fails.
Optional Visual Alarm Verification
The detector supports the optional DHI-ARD1130-CAM infrared camera module, which converts it into a PIR-camera detector for alarm images and visual verification. If a camera-equipped detector is required from the outset, consider the Dahua ARD2251E-W2-V Outdoor PIR Camera Detector.
Wireless Performance and Battery Life
The ARD2251E-W2 communicates with the alarm hub over Dahua’s encrypted wireless platform, with a quoted RF range of up to 1,200 metres in open space. Four CR123A batteries provide up to five years of operation without a camera module, based on Dahua’s stated test conditions. Actual range and battery life will vary according to usage, signal conditions and the installation environment.
Installation and Expansion
The detector can be wall or pole mounted at a recommended height of 0.8 to 1.3 metres. Correct placement is important for detection accuracy and pet immunity, so professional installation is recommended. Confirm alarm-hub compatibility and the appropriate mounting bracket before ordering.
Expand your system with compatible Dahua wireless alarm accessories, including sirens, keypads, detectors and control devices for Dahua AirShield systems.
Technical Specifications
| Model |
ARD2251E-W2 |
| Detection technology |
PIR + microwave + optical technology |
| Detection range |
Up to 15 m / 90° |
| Microwave frequency |
24 GHz |
| PIR sensitivity |
Three adjustable levels |
| Pet immunity |
Up to approximately 80 cm / 40 kg |
| Wireless security |
AES128 encryption, two-way communication and frequency hopping |
| RF range |
Up to 1,200 m in open space |
| Power supply |
4 × CR123A batteries |
| Operating temperature |
−25°C to +60°C |
| Weather protection |
IP66 |
| Dimensions |
211 × 106 × 94 mm |
| Mounting |
Wall or pole mount |
| Optional accessories |
DHI-ARD1130-CAM camera module; ARA34E detector bracket |
Need Help Planning Your Dahua Alarm System?
CTC Communications can help you select compatible Dahua AirShield equipment and arrange professional alarm installation across Sydney.
Request a Quote
