The DHI-ARD512-W2 is a wireless indoor sensor that detects the sound of breaking glass, making it ideal for enhancing intrusion detection in residential and commercial spaces. It analyzes both low- and high-frequency audio patterns to accurately identify glass breakage while filtering out false triggers. With third-party input support and wireless frequency hopping, it ensures reliable operation even in complex environments.
Key Features
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Dual-Frequency Glass Break Detection - Analyzes high and low-frequency audio to accurately detect shattered glass across multiple glass types.
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False Alarm Reduction Algorithm - Built-in processing helps minimize false alarms from environmental noise or non-glass sounds.
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Broad Glass Compatibility - Detects tempered, laminated, wired, plate, float, and double-glazed glass for wide installation flexibility.
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Third-Party Detector Support - Two external alarm input channels allow integration with wired detectors for multi-sensor coverage.
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Two-Way Encrypted Wireless Communication - Uses AES128 encryption for secure data transfer and stable two-way communication.
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Frequency Hopping Technology - Automatically changes channels to avoid signal interference, ensuring consistent performance.
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Remote Cloud Updates - Device supports cloud-based firmware updates for ongoing feature enhancements and security.
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Battery-Powered with Long Life - Runs on a single CR123A battery, offering up to 3 years of life depending on configuration.
Perfect For:
- Retail storefronts with large glass windows
- Home sliding doors or glass patio doors
- Office buildings with interior glass partitions
- Apartment balconies and glass facades
- Warehouse windows and skylights
- School or clinic entry points
Install Tips
- Mount near glass windows or doors, facing the glass directly for best detection.
- Avoid installing behind thick curtains or soft furnishings that can absorb sound.
- Use the test mode function to verify detection range and performance during setup.
- When integrating with third-party wired sensors, ensure input types (NO/NC) match configuration.
- Use in indoor environments only; avoid areas with consistent loud background noise (e.g., factories).
- For stable wireless performance, ensure the control hub is within the specified range.
Downloads
Quick-Read Specs Card
| Spec |
Detail |
| Detection Range |
Max. 9 m (29.5 ft) |
| Glass Types Detected |
Tempered, laminated, wired, float, plate, double-glazed |
| Glass Size Range |
0.3 m × 0.3 m to 3 m × 3 m |
| Audio Type |
Dual-frequency (low & high frequency) |
| External Alarm Inputs |
2 (NO/NC) |
| Wireless Range |
Up to 1,200 m (3,937 ft) (open space) |
| Wireless Protocol |
433.1–434.6 MHz, AES128 encrypted |
| Frequency Hopping |
Yes |
| Battery Type |
1 × CR123A |
| Battery Life |
Up to 3 years (NO mode) |
| Installation |
Surface mount |
| Operating Temp. |
–10 °C to +55 °C (indoor use) |
| Dimensions |
107.8 × 34.5 × 24.8 mm |
| Weight |
45 g (net) |
Extra Info
Advanced Dual-Frequency Detection
The sensor listens for the unique acoustic signature of breaking glass: a low-frequency thump followed by a high-frequency shatter. This dual-frequency analysis significantly improves accuracy and reduces false alarms from unrelated sounds like clapping or dropped items.
Multi-Glass Compatibility
Covers six types of common glass materials, making it suitable for various environments — from laminated windows in schools to float glass in homes.
Frequency Hopping for Signal Reliability
To prevent signal loss due to interference from other wireless devices, the system actively hops between available channels, ensuring reliable communication with the alarm hub.
Two-Way Communication with Encryption
The device doesn't just send signals — it receives confirmations, reducing the risk of missed alerts. All communication is AES128-encrypted, enhancing security against interception.
Third-Party Detector Integration
With two alarm input ports, you can expand your protection zone by connecting wired detectors — ideal for blending old and new security components.
Battery Efficiency Based on Input Type
The battery can last up to 3 years with normally open (NO) input sensors. For setups where both input channels use normally closed (NC) mode, expect about 1 year of battery life.
Q&A
Q: Can this detect all kinds of glass?
Yes. It supports tempered, laminated, wired, plate, float, and double-glazed glass — provided it falls within the specified thickness and size.
Q: How far away can the detector be from the glass?
Up to 9 meters (29.5 ft), assuming there’s no obstruction and the sensor is facing the glass.
Q: Will it work if the environment is noisy?
It uses algorithms to filter out ambient noise and only responds to the specific sound signature of breaking glass, helping reduce false alarms.
Q: Can it integrate with existing alarm systems?
Yes. The two alarm input ports allow connection to other wired sensors, expanding compatibility.
Q: Does the device notify me of low battery?
Yes, it includes low battery detection and will trigger a warning through the alarm system.
Q: How do firmware updates work?
Firmware can be updated over the cloud — no physical connection needed, and it auto-recovers from failed updates.
Q: What is the difference between NO and NC inputs?
These refer to “Normally Open” and “Normally Closed” contacts. Battery life depends on which mode is used — NO mode is more efficient.
Q: Does this work outdoors?
No. This model is designed for indoor use only and is not weatherproof.
