Dahua ARD2231-W2 Wireless Alarm PIR Dual tech Pet Immune Detector

Dahua ARD2231-W2 Wireless Dual-Tech Detector

The Dahua ARD2231-W2 Wireless Alarm PIR Dual-Tech Pet Immune Detector combines passive infrared and microwave sensing to provide more dependable indoor motion detection for compatible Dahua AirShield systems. Using two detection technologies helps reduce unwanted alarms caused by environmental conditions while maintaining useful coverage across the protected area.

The detector covers up to 12 metres at a 90° angle when installed at the recommended height of 2.2 metres. Pet immunity, adjustable sensitivity and digital temperature compensation make it suitable for a broad range of residential and commercial environments.

Key Features

• Dual-technology detection: Combines a dual-element PIR sensor with 24 GHz microwave detection for improved motion verification.
• 12-metre coverage: Provides a 90° detection field when mounted at the recommended 2.2-metre height.
• Pet immunity: Designed to reduce alarms caused by pets weighing up to 18 kg and measuring less than 50 cm in height.
• Three sensitivity levels: Allows detector response to be adjusted for the room and installation conditions.
• Digital temperature compensation: Helps maintain consistent detection performance as indoor temperatures change.
• Temperature monitoring: Measures the surrounding temperature and supports an overheating alarm through a compatible system.
• Secure wireless communication: AES128 encryption, two-way communication and frequency hopping help maintain a stable connection.
• System alerts: Supports low-battery warnings, tamper alarms and signal-strength checking.
• Remote updates: Supports cloud-based firmware updates through the compatible Dahua alarm system.

Why Choose Dual-Technology Detection?

A standard PIR detector responds to changes in infrared energy. The ARD2231-W2 adds microwave sensing, providing another layer of motion analysis in rooms where heat, sunlight or airflow may affect detection conditions. This makes it a useful step up from the ARD1233-W2 standard PIR detector when greater resistance to environmental interference is preferred.

For areas where alarm-image verification is required, the ARD1731-W2 PIR camera detector adds high-resolution alarm snapshots and infrared illumination.

Pet-Friendly Detection

Pet immunity can help reduce unwanted alarms from smaller household animals, but detector placement remains important. Install the detector at the recommended height and avoid positioning it where pets can climb onto furniture or move close to the sensor.

Explore our full range of Dahua wireless alarm motion detectors to compare indoor and visual-verification options.

Compatibility and Installation

The ARD2231-W2 is designed for compatible Dahua AirShield wireless alarm hubs. The hub model and wireless frequency should be confirmed before ordering because Dahua produces regional frequency variants.

This detector is intended for indoor wall mounting. Additional contacts, sirens, keypads and alarm devices are available from our Dahua wireless alarm accessories collection.

Technical Specifications

• Model: DHI-ARD2231-W2
• Detection technology: Dual-element, low-noise PIR sensor and microwave sensor
• Detection mode: PIR + microwave
• Microwave frequency: 24 GHz
• Detection range: Up to 12 m at 90°
• Recommended installation height: 2.2 m
• Detection speed: 0.3–3 m/s
• Pet immunity: Up to 18 kg and less than 50 cm in height
• Sensitivity: Three adjustable levels
• White-light resistance: 2,000 lx
• Temperature measuring range: –15°C to +65°C indoors
• Wireless frequency: 433.1–434.6 MHz
• Communication: Two-way with frequency hopping
• Communication distance: Up to 1,200 m in open conditions
• Encryption: AES128
• Power supply: 1 × CR123A battery
• Battery life: Up to three years under stated operating conditions
• Operating temperature: –10°C to +55°C indoors
• Operating humidity: 10%–90% RH
• Dimensions: 104 × 60 × 50 mm
• Net weight: 106 g
• Installation: Indoor wall mount
• Casing: PC + ABS