Dahua DHI-ARD2251E-W2 Wireless External Triple-Tech Detector

Features

• Anti-Masking Detection: Prevents blocking or covering of the sensor
• Moving Detection: Detects attempts to move or detach the device
• PIR-Cam Compatibility: Supports the installation of camera modules for video verification
• Pet Immunity: Up to 80 cm, 40 kg
• Temperature Monitoring: Monitors environmental temperature
• Stable Communication: Two-way communication & frequency hopping for reliable connectivity with alarm hub
• Cloud Update: Supports remote updates via the mobile app
• Dual Backup System: Auto recovery in case of update failure

 

Specifications

Function

• Indicator Light: 1 × Green alarm indicator
• Buttons:
  • 1 × Power switch
  • 1 × Detection range adjustment switch
• Remote Update: Cloud update support
• Low Battery Detection: Yes
• Tamper Protection: Tamper alarm
• Moving Detection: Yes

Technical

• Detection Mode: PIR + Microwave
• Sensitivity: PIR - 3 adjustable levels
• Detection Range:
  • Angle: 90°
  • Range: 15 m (49.21 ft) (installation height: 1 m / 3.28 ft)
• Detection Speed: 0.3 m/s – 2 m/s
• Microwave Frequency: 24 GHz
• Pet Immunity: <80 cm (2.62 ft), about 40 kg (88.19 lb)
• White Light Resistance: 10,000 lux
• Anti-Masking: Yes
• Two-Way Digital Temperature Compensation: Yes

Scenario

• Usage: Outdoor, indoor
• Operating Current: 20 uA
• Alarm Current:
  • Without Camera: 26mA (Avg); 250mA (Max)
  • With Camera (Night Mode): 380mA (Avg); 1.5A (Max)

Wireless

• Carrier Frequency: 433.1 MHz–434.6 MHz
• Transmitter Power (EIRP): Limit 10 mW
• Communication Mechanism: Two-way
• Communication Distance:
  • RF: Up to 1,200 m (3,937.01 ft) in open space
• Encryption Mode: AES128
• Frequency Hopping: Yes

General

• Power Supply: 4 × CR123A batteries
• Battery Life:
  • Without Camera: 5 years (triggers 10 alarms/day)
  • With Camera: 3.5 years (triggers alarms twice/week)
• Operating Temperature: –25 °C to +60 °C (–13 °F to +140 °F)
• Operating Humidity: 10%–90% (RH)
• Product Dimensions: 211 mm × 106 mm × 94 mm (8.31" × 4.17" × 3.7")
• Installation Height: 0.8 – 1.3 m
• Net Weight: 651 g (1.44 lb)
• Gross Weight: 890 g (1.96 lb)
• Installation Options: Wall mount, pole mount
• Casing Material: PC + GF

Protection & Certifications

• IP Rating: IP66
• Certifications: CE
• Anti-Corrosion Level: Basic Protection

Storage & Packaging

• Storage Temperature: –25 °C to +60 °C (–13 °F to +140 °F)
• Packaging Dimensions: 251 mm × 116 mm × 119 mm (9.88" × 4.57" × 4.69”)