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ARD2251E-W2(868)

Dahua Wireless External Triple-Tech Detector

> Support anti-masking detection. 

Support moving detection to prevent someone move or detach device. 

Support the installation of camera modules to form PIR-Cam to implement video verification. 

Pet immunity: up to 80 cm, 40kg. 

Support environment temperature monitoring. 

Supports two-way communication and frequency hopping to make communication with alarm hub stable and reliable. 

Features cloud update. You can also remotely update the device on the mobile app. 

Offers a dual backup system, and uses auto recovery when an update fails.

  • Specifications
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  • Function

    Indicator Light

    1 × green alarm indicator

    Button

    1 × power switch;
    1 × detection range adjustment switch

    Remote Update

    Cloud update

    Low Battery Detection

    Yes

    Tamper

    Tamper alarm

    Moving detection

    Yes

    Technical

    Detection Mode

    PIR + Microwave

    Sensitivity

    PIR: 3 levels adjustable

    Detection Range

    Angle:90°
    Range:15 m (49.21 ft), the installation height is 1 m (3.28 ft)

    Detection Speed

    0.3 m/s–2 m/s

    Microwave Frequency

    24 G

    Pet Immunity Level

    <80 cm (2.62 ft), about 40 kg (88.19 lb)

    White Light Resistance Level

    10,000 lux

    Anti-masking

    Yes

    Two-way Digital Temperature Compensation

    Yes

    Scenario

    Outdoor, indoor

    Operating Current

    20 uA

    Alarm Current

    Without Camera: 26mA (Avg); 250 mA (Max)
    With Camera in Night: 380 mA (Avg); 1.5 A (Max)

    Wireless

    Carrier Frequency

    868.0 MHz–868.6 MHz

    Transmitter Power (EIRP)

    Limit 25 mW

    Communication Mechanism

    Two-way

    Communication Distance

    RF: Up to 1,600 m (5,249.34 ft) in an open space

    Encryption Mode

    AES128

    Frequency Hopping

    Yes

    General

    Power Supply

    CR123A × 4

    Battery Life

    Without Camera: 5 years (triggers 10 alarms a day)
    With Camera: 3.5 years (triggers alarms twice a 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 to 1.3 m

    Net Weight

    651 g (1.44 lb)

    Gross Weight

    890 g (1.96 lb)

    Installation

    Wall mount, pole mount

    Casing Material

    PC + GF

    Protection

    IP66

    Certifications

    CE

    EN 50131-1:2006+A1:2009+A2:2017+A3:2020

    EN 50131-6:2017+A1:2021

    EN 50131-5-3:2017

    EN 50131-2-4:2020

    Security Grade 2

    Environmental Class IV

    Anti-corrosion Level

    Basic Protection

    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”)