Dahua Alarm

The Dahua DHI-ARD821-W2 is a wireless panic button for the Dahua AirShield alarm system. One press raises an immediate emergency alarm — useful for intrusion, fire, a medical scare or any moment you need help fast — and the alert goes to your AirShield hub and your phone. It is IP54 rated, runs on a coin cell and can be wall-mounted or carried, talking to the hub over an encrypted 868 MHz two-way link. An AirShield hub is required and sold separately.

Key points
- One-touch panic / SOS button raises an immediate emergency alarm
- 868 MHz two-way radio with AES128 encryption and frequency hopping
- Range up to 1,200 m in open space to the hub
- IP54 rated; multi-status LED with battery level in the app
- Accidental-press prevention to avoid false alerts
- CR2032 battery, around 3 years; wall-mount or portable; needs an AirShield hub

The Dahua DHI-ARD512-W2 is a wireless glass-break detector for the Dahua AirShield alarm system. It listens for the specific sound of breaking glass within about 9 metres and raises an alarm before an intruder is through the window, covering tempered, double-glazed, laminated, wired, plate and float glass. It links to your AirShield hub over an encrypted 868 MHz two-way connection and runs on a battery, so there is no wiring to run. An AirShield hub is required and sold separately.

Key points
- Acoustic glass-break detection up to 9 m, for most common glass types
- Dual-frequency listening with algorithms to cut false alarms
- 868 MHz two-way radio with AES128 encryption and frequency hopping
- Range up to 1,600 m in open space to the hub
- Two wired alarm inputs to add third-party detectors
- CR123A battery with around 3 years of life; tamper alarm; indoor use

The Dahua DHI-ARD324-W2(S) is a Door Detector Plus for the Dahua AirShield alarm system. As well as sensing when a door or window is opened, it detects shock and tilt, so it catches someone forcing or lifting a door, not just opening it. It has a wired input for a third-party contact and even monitors temperature. It links to your AirShield hub over an encrypted two-way wireless connection and runs on a long-life battery, so there is no wiring to the hub. An AirShield hub is required and sold separately.

Key points
- Three sensors in one: open/close, shock, and tilt up to 25°
- Reed switch plus a triaxial accelerometer for accurate detection
- One wired alarm input for a third-party contact (NO/NC/impulse)
- Built-in temperature monitoring (-15 C to +65 C)
- Encrypted two-way wireless (AES128, frequency hopping), up to 1,000 m
- CR123A battery with up to around 3 years of life; tamper alarm
- Indoor use on non-metal doors; requires a Dahua AirShield hub

The Dahua DHI-ARD323-W2(S) is a wireless magnetic door and window detector for the Dahua AirShield alarm system. A sensor and a separate magnet sit on the door (or window) and its frame; when the door is opened while the system is armed, the magnet moves away from the sensor and the alarm is triggered. You can see the live open or closed state of every door and window in the DMSS app. It links to the hub over an encrypted two-way RF connection and runs on a battery. An AirShield hub is required and sold separately.

Key points
- Magnetic reed contact for doors and windows; triggers on opening when armed
- Real-time open/closed status of each door and window in the DMSS app
- Encrypted two-way RF link with frequency hopping; signal-strength check
- Tamper alarm, ambient temperature monitoring and low-battery warning
- Slim design for discreet mounting; magnet gap up to about 40 mm
- CR123A battery, around 3 years; indoor; requires an AirShield hub

The Dahua DHI-ARD1731-W2 is an indoor wireless PIR motion detector with a built-in camera, part of the Dahua AirShield wireless alarm range. When it detects movement it captures and sends a burst of HD snapshots to your Dahua alarm hub and phone, so you can visually confirm whether an alarm is a real intruder or a false trigger before you act.

Key points
- Indoor PIR detector with built-in 2MP camera (snapshots up to 1600 × 1200)
- Sends up to 6 HD images in about 10 seconds for visual alarm verification
- 12 m detection range, 88° horizontal coverage; pet immunity up to 18 kg
- Two-way encrypted wireless (AES128) with frequency hopping; tamper alarm
- Battery powered (3 × CR123A), about 4 years typical life
- Requires a Dahua AirShield wireless alarm hub (sold separately)

The Dahua DHI-ARD1233-W2 is a wireless indoor PIR motion detector for the Dahua AirShield alarm system. It covers a 12-metre, 90-degree area, ignores pets up to 18 kg to cut false alarms, and reports to the hub over encrypted two-way 868 MHz wireless with a range of up to 1,600 metres in open space. It runs about four years on its battery and is part of a system, so it needs an AirShield hub to work.

Key points
- Indoor wireless PIR detector for the Dahua AirShield alarm system
- 12 m detection at 90° from a 2.2 m mounting height; pet immunity up to 18 kg
- Dual-element PIR with temperature compensation and 3 sensitivity levels
- 868 MHz two-way wireless, AES128 encryption, frequency hopping, up to 1,600 m open-space range
- CR123A battery with roughly 4-year life; tamper and low-battery alarms
- Wall mount, 104 x 60 x 50 mm; requires an AirShield hub (sold separately)

The Dahua DHI-ARC3800H-FW2 is the Alarm Hub 2, the brain of a Dahua AirShield wireless alarm system. It manages your wireless detectors, sirens, keypads and keyfobs, decides when to raise an alarm, and notifies you through the free DMSS app. It connects three ways — Ethernet, Wi-Fi and 4G cellular — so it keeps reporting even if one network drops, and a built-in rechargeable battery keeps it running through a power cut. Wireless peripherals are required and sold separately.

Key points
- Central hub for the AirShield system; up to 150 wireless and wired peripherals across 32 areas
- Triple connectivity: Ethernet (RJ45), Wi-Fi and 4G cellular (dual SIM) with multi-network redundancy
- Built-in 4,750 mAh battery for around 12 hours of backup during a power cut
- 868 MHz two-way radio to peripherals with AES128 encryption and frequency hopping
- Alarm video verification from up to 8 IP cameras; SMS and phone-call alerts to 12 numbers
- Self-monitor free in DMSS with no monthly fees, or link to a monitoring centre (SIA / SoftGuard)
- Arm by app, keypad, keyfob, card, SMS or schedule; wireless peripherals sold separately

The Dahua DHI-ARC3000H-FW2 is the wireless hub at the centre of a Dahua AirShield alarm system. It manages your wireless detectors, sirens, keypads and keyfobs, decides when to raise an alarm and notifies you through the free DMSS app. It connects three ways — Ethernet, Wi-Fi and 4G cellular — so it keeps reporting even if one network drops, and a built-in rechargeable battery keeps it running through a power cut. Wireless peripherals are required and sold separately.

Key points
- Central hub for the AirShield system; up to 150 wireless peripherals
- Supports up to 6 sirens, 64 keyfobs, 8 keypads, 8 PIR cameras and 4 repeaters
- Triple connectivity: Ethernet (RJ45), Wi-Fi 2.4G and 4G cellular (dual SIM)
- Built-in rechargeable battery for around 12 hours of backup in a power cut
- Encrypted two-way wireless to peripherals (AES128, frequency hopping)
- Alarm video verification with IP cameras; app push, SMS and phone-call alerts to up to 5 numbers
- Self-monitor free in DMSS with no monthly fees; wireless peripherals sold separately