At a glance
- Detection Range
- 12 m (39.37 ft) (90°)
- Sensor
- Dual-element low-noise PIR sensor, microwave sensor
- Battery Life
- 3 years
- Carrier Frequency
- 433.1 MHz to 434.6 MHz
- Communication Distance
- Up to 1,200 m (3937.01 ft) in an open space
- Detection Mode
- PIR + Microwave
Model ARD2231-W2 (BDahua ARD2231-W2 (B) Wireless Dual-Tech Motion Detector
₹6,673 Incl. GST
₹5,655 + 18% GST
At a glance
- Detection Range
- 12 m (39.37 ft) (90°)
- Sensor
- Dual-element low-noise PIR sensor, microwave sensor
- Battery Life
- 3 years
- Carrier Frequency
- 433.1 MHz to 434.6 MHz
- Communication Distance
- Up to 1,200 m (3937.01 ft) in an open space
- Detection Mode
- PIR + Microwave
Motion detector for rooms where heaters, air conditioners or fireplaces could fool a plain PIR, such as kitchens, server rooms and warehouses: infrared and 24 GHz microwave must both detect movement. 12 m range, 18 kg pet immunity; for Dahua wireless alarms.
- WarrantyManufacturer warranty under Dahua's terms. Warranty claims
- DeliveryPrice, availability and delivery charges are confirmed in your quotation. Shipping and delivery
Overview
The Dahua ARD2231-W2 (B) is a wireless motion detector for Dahua 433 MHz alarm systems that only raises an alarm when two different sensors agree. A passive infrared (PIR) sensor watches for body heat and a 24 GHz microwave sensor watches for movement, so a warm draught from a heater or air conditioner on its own does not set it off. It suits rooms in a home, shop, office or warehouse where a plain PIR detector would give false alarms.
Is it right for you?
- Choose it for kitchens, server rooms, air-conditioned offices, warehouses and rooms with heaters or fireplaces.
- It is for indoor use. For a garden, yard or driveway, choose an outdoor detector such as the ARD2251E-W2.
- Pets up to 18 kg and under 50 cm tall are ignored, so it suits homes with a cat or small dog.
- If you want a picture of what triggered the alarm, the ARD1731-W2 has a built-in camera.
Key features
- PIR plus 24 GHz microwave detection: both must see movement before the alarm is sent, which cuts false alarms.
- 12 m range across 90 degrees when mounted at 2.2 m, enough for a typical room or open office.
- Pet immunity up to 18 kg and 50 cm height.
- Three sensitivity levels and two-way digital temperature compensation, so the range does not shrink in a hot room.
- Two-way 433 MHz radio with up to 1,200 m range in open space, frequency hopping and AES128 encryption.
- Tamper alarm, low battery detection and updates sent from the cloud through the hub.
- Runs on one CR123A battery, rated for about 3 years at 10 triggers a day.
- Test mode for checking coverage and signal strength after fitting.
What else you need
A Dahua 433 MHz wireless alarm hub, such as the ARC3000H. The detector is set up and configured through the Dahua app.
A CR123A battery (one is specified as the power supply).
Installation
An alarm installer should position and pair it. It mounts on a wall at 2.2 m, the height the 12 m range is specified at, and pairs with the hub from the app.
Keep it away from ceiling fans, moving curtains and other things that move, because the microwave sensor can see them.
Before you buy
Indoor use only, from -10 to 55 °C and 10 to 90% humidity.
Battery life depends on how often it triggers; a busy corridor will drain the battery faster than the 3-year rating.
Technical specifications
Key facts
- What is it?
- Motion detectorBrand Dahua
- How is it powered?
- CR123A × 1
- Which documents are available?
- Datasheet Open documents
- Can SecurityGearHub help with installation?
- Setup guidanceManuals, wiring guides and answers to setup questions. On-site work is arranged separately where available. Ask about installation
- Not stated by the manufacturer
- outdoor rating, box contents
RelatedGuideWireless alarm system guideDocumentsAll Dahua documents
General
- Model / configuration
- ARD2231-W2 (B)
- Test Mode
- Yes
- Operating Current
- 11 uA
- Alarm Current
- 69 mA
- Carrier Frequency
- 433.1 MHz to 434.6 MHz
- Communication Mechanism
- Two-way
- Communication Distance
- Up to 1,200 m (3937.01 ft) in an open space
- Encryption Mode
- AES128
- Frequency Hopping
- Yes
- Indicator Light
- 1 × green alarm indicator
- Button
- 1 × power switch
- Remote Update
- Cloud update
- Low Battery Detection
- Yes
- Measuring Accuracy
- ±1 °C (±1.8 °F)
- Sensor
- Dual-element low-noise PIR sensor, microwave sensor
- Detection Mode
- PIR + Microwave
- Sensitivity
- 3 levels adjustable
- Detection Range
- 12 m (39.37 ft) (90°) with installation height of 2.2 m (7.21 ft)
- Detection Speed
- 0.3 m/s, 3 m/s (0.98 ft/s, 9.84 ft/s)
- Microwave Frequency
- 24 G
- Pet Immunity Level
- ≤ 18 kg (39.68 lb), height less than 50 cm (19.68 ft)
- White Light Resistance Level
- 2000 lux
- Features and configuration
- Dual-Tech Motion Detector Wireless Motion detector with microwave sensor
Avoids false alarms even in rooms or warehouses with active air conditioners and fireplaces
Pet Immunity level: Weight up to 18 kg and Height up to 50 cm
Input
- Power Supply
- CR123A × 1
- Battery Life
- 3 years (If triggered 10 times a day with a battery efficiency of 70%)
- Power Consumption
- Max. 640 mW
Protection
- Tamper
- Yes
Environment
- Two-way Digital Temperature Compensation
- Yes, no attenuation of detection distance in high temperature.
- Operating Temperature
- Indoor:, 10 °C to +55 °C (+14 °F to +131 °F) Certified temperature:, 10 °C to +40 °C (+14 °F to +104 °F)
- Operating Humidity
- 10% to 90% (RH)
- Measuring Range (Temperature)
- Indoor:, 15 °C to +65 °C (+5 °F to +149 °F)
Physical
- Product Dimensions
- 104.0 mm × 60.0 mm × 50.0 mm (4.09" × 2.36" × 1.97")
- Packaging Dimensions
- 135.0 mm × 98.5 mm × 56.8 mm (5.31" × 3.88" × 2.24")
- Net Weight
- 106 g (0.23 lb)
- Gross Weight
- 184 g (0.41 lb)
- Casing Material
- PC + ABS
Approvals
- Certifications
- CE FCC
- Warranty
- Manufacturer warranty under Dahua's terms. How claims work
Product attributes and shipping details
| Brand | Dahua |
|---|---|
| Radio Frequency | 433.1 MHz–434.6 MHz |
Downloads
Documentation
- Dahua ARD2231-W2 (B) datasheetDatasheet · This model · 372.7 KBDownload
Series documents can differ from your exact model. Report a wrong or missing file
Questions about this product
Why does it have two sensors?
The PIR sensor reacts to body heat and the microwave sensor to movement. Both must agree before an alarm is sent, so heat from an air conditioner or heater alone does not trigger it.
Does it need an internet connection?
The detector talks to the hub by 433 MHz radio. The hub handles the app connection and cloud updates.
Does it ignore pets?
Yes, pets up to 18 kg and under 50 cm tall are ignored.
Can it be used outdoors?
No, it is rated for indoor use only, from -10 to 55 °C.
What battery does it use and how long does it last?
One CR123A battery, rated for about 3 years at 10 triggers a day.
Which hubs does it work with?
Dahua 433 MHz wireless alarm hubs such as the ARC3000H.
Ask about this modelSetup, compatibility, what is in the box
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