Dahua DH-ARD2251E-W2, Wireless External Triple-Tech Detector

Key Features

• Triple-technology motion detection (PIR + Microwave + intelligent algorithm)

• Outdoor-rated design for perimeter and approach protection

• Pet-immune detection to reduce false alarms

• Anti-masking detection for enhanced security

• Tamper protection against removal or interference

• Optional camera module support for video verification

• Built-in temperature monitoring

• Two-way encrypted wireless communication

• Remote configuration and firmware updates via alarm hub

• Designed for Dahua 868 MHz wireless alarm systems

Technical Specifications

• Detection Type: Triple-tech (PIR + Microwave + algorithm processing)

• Detection Distance: Up to 15 m

• Detection Angle: Wide-angle coverage

• Pet Immunity: Supports pet-friendly environments

• Wireless Frequency: 868 MHz

• Encryption: Secure wireless communication

• Communication Range: Long-range wireless (open-space conditions)

• Power Supply: Battery powered

• Battery Type: CR123A lithium batteries

• Operating Temperature: Suitable for outdoor environments

• Ingress Protection: IP66 weather-resistant housing

• Mounting Height: Approximately 0.8 m – 1.3 m recommended

Compatible Systems

• Dahua wireless alarm hubs supporting 868 MHz detectors

• Dahua AirShield wireless alarm ecosystem

• Optional Dahua PIR-Cam video verification modules

Typical Applications

• Residential perimeter protection

• Driveways and yards

• Commercial building approaches

• Outdoor areas requiring pet-immune detection

• Sites needing reduced false alarm rates

Installer Notes

• Install away from direct sunlight, reflective surfaces, and moving vegetation

• Ensure correct mounting height for optimal pet immunity performance

• Perform walk testing after installation to fine-tune detection zones

• Best results achieved when paired with Dahua wireless alarm hubs and sirens