The Dahua DHI-ARD1233-W2 is a compact wireless PIR motion detector that senses human movement while ignoring pets up to 18 kg. Designed for indoor use in homes, apartments, and shops, it features 3-level sensitivity adjustment, tamper alarms, and cloud-based updates. Its built-in temperature compensation ensures consistent detection even in varying indoor climates.
Key Features
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Pet Immunity Function - Ignores movement from pets weighing up to 18 kg, reducing false alarms.
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Auto Temperature Compensation - Maintains reliable detection range even during temperature fluctuations.
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3-Level Sensitivity Adjustment - Customize detection based on room size, layout, or activity level.
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Tamper Detection - Triggers an alert if the sensor is removed or tampered with.
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Two-Way RF Communication - Sends and receives confirmation signals to ensure alarm delivery.
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Signal Strength Detection - Helps installers find the best mounting position for stable performance.
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Low Battery Alert - Notifies users before the battery is depleted — reducing maintenance gaps.
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Cloud-Based Updates -Keeps firmware current with automatic recovery from failed updates.
Perfect For:
- Pet-friendly homes and apartments
- Small retail stores and back offices
- Indoor hallways or living rooms
- Storage rooms or server closets
- Bedrooms or nurseries
- Independent clinics or wellness centers
Install Tips
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Mount Height: Install at approximately 2.2 meters for optimal 12-meter range coverage.
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Avoid Direct Sunlight: Keep away from windows to reduce thermal interference.
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Test Location First: Use signal strength check mode before final installation.
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Choose Sensitivity Wisely: Use low for small rooms, high for open areas.
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Keep Clear of Heating/Cooling Vents: Avoid false triggers from sudden air temp changes.
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Use in Combination: For best results, pair with alarm hub and keyfob for full system control.
Downloads
Quick-Read Specs Card
| Feature |
Details |
| Detection Mode |
PIR (Passive Infrared) |
| Pet Immunity |
Up to 18 kg |
| Detection Range |
12 m (90° angle) at 2.2 m install height |
| Sensitivity Levels |
3 (adjustable) |
| Temperature Compensation |
Yes, digital, 2-way |
| RF Frequency |
433.1–434.6 MHz |
| Communication Distance |
Up to 1,200 m (open space) |
| Encryption |
AES128 with Frequency Hopping |
| Battery Type |
1 × CR123A |
| Battery Life |
Up to 4 years |
| Mounting |
Wall mount |
| Dimensions |
104 × 60 × 50 mm |
| Operating Temp |
–10 °C to +55 °C (indoor use) |
| Certifications |
CE |
Extra Info
Pet Immunity
The sensor features an intelligent pet immunity function designed to prevent false alarms triggered by household pets. By analyzing movement patterns, body mass, and shape, it effectively filters out motion caused by animals weighing up to 18 kilograms. This makes it an excellent solution for homes with cats, small to medium-sized dogs, and other pets, ensuring that only actual human intrusions are detected while pets can move freely within the monitored space.
Digital Temperature Compensation
Environmental temperature changes can affect the performance of conventional PIR sensors. This device overcomes that limitation through advanced digital temperature compensation. It dynamically adjusts its detection sensitivity based on ambient temperature fluctuations, maintaining consistent performance regardless of the season or indoor climate. Whether in summer heat or cooler winter temperatures, the sensor continues to operate with precision.
Dual-Element PIR Sensor
At the core of the detection system is a low-noise, dual-element passive infrared (PIR) sensor. This dual-element configuration enhances motion detection accuracy by providing a differential signal that better distinguishes between actual movement and environmental noise. It is finely tuned to recognize human movement speeds ranging from 0.3 to 3 meters per second, allowing for quick and accurate intrusion detection while reducing false triggers from inanimate objects or slow temperature changes.
Wireless Range and Security
The sensor boasts an impressive wireless transmission range of up to 1,200 meters in open space, making it suitable for large homes, commercial properties, or even outdoor perimeter detection when paired with compatible systems. Security is reinforced through AES-128 encryption, ensuring that data transmissions are secure and resistant to interception. Additionally, frequency hopping spread spectrum (FHSS) technology enhances communication reliability by avoiding signal interference from other wireless devices in the area.
Low Maintenance
Designed with user convenience in mind, this wireless PIR sensor offers a long-lasting battery life of up to four years, reducing the need for frequent maintenance or battery replacements. Furthermore, it supports over-the-air (OTA) firmware updates via cloud connectivity, enabling remote feature enhancements and bug fixes without requiring manual intervention. This combination of longevity and cloud-based maintenance makes it an ideal choice for users seeking a low-maintenance, high-reliability security solution.
Q&A
Q: Will this sensor detect my dog?
No, it has built-in pet immunity for animals up to 18 kg, making it suitable for most pets.
Q: How far can it detect motion?
It detects up to 12 meters within a 90° arc when mounted at 2.2 meters.
Q: Can I adjust the motion sensitivity?
Yes. It offers three levels of sensitivity for fine-tuned performance based on the room type.
Q: Does it work with other brands?
This detector is designed for use with Dahua alarm hubs. Cross-brand compatibility is not guaranteed.
Q: How often do I need to change the battery?
The CR123A battery lasts up to 4 years with standard usage.
Q: Will it still work in hot rooms?
Yes. Thanks to auto temperature compensation, its detection accuracy stays consistent in warm indoor conditions.
Q: Is it secure from tampering?
Yes. If someone tries to remove or open the detector, it will trigger a tamper alert.
Q: Can I update the firmware later?
Yes. Cloud-based updates are supported, and the system automatically recovers if an update fails.
