The DHI-ARD912-W2(D) is a compact wireless leak detector built for early detection of indoor water damage. Designed for use near sinks, dishwashers, washing machines, and internal pipes, it uses secure two-way RF communication to trigger alerts on leaks and overheating. With a 3-year battery life, cloud firmware updates, and IPX5 protection, it’s a maintenance-light solution that fits in tight spaces and installs without wiring.
Key Features
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Two-Way Wireless Communication - Maintains reliable connections over long distances (up to 800m) using secure RF.
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AES128 Encryption + Jamming Detection - Keeps your home or site secure with anti-interference and encrypted signals.
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Leak Detection with Adjustable Sensitivity - Tailor the device to your environment for accurate leak recognition.
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Ambient Temperature Display with Overheat Alerts - Detects heat as well as water, offering extra protection for utility zones.
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Cloud-Based Firmware Updates - Always stay current with automatic cloud updates and auto-recovery if one fails.
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LED Status Indicator - Easily see pairing, power, and alarm status with one multi-function LED.
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3-Year Battery Life - Long-lasting CR123A battery supports up to 3 years of operation (1 trigger/day).
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Tool-Free Mounting - Install on any flat surface—no wiring or wall cutting required.
Perfect For:
- Under kitchen or bathroom sinks
- Behind washing machines
- Inside water heater cupboards
- Under dishwashers
- Under AC units or drip trays
- Near indoor pipe junctions
Install Tips
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Mount on flat surfaces where water is most likely to pool, like under appliances.
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Avoid outdoor use — the device is for indoor applications only.
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Pair before placement to ensure strong signal at final location.
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Keep sensor contacts clean and dry until installation to avoid early triggers.
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Don’t place on metallic surfaces which can interfere with RF communication.
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Use test mode after install to ensure proper function and alerting.
Downloads
Quick-Read Specs Card
| Spec |
Details |
| Sensor Type |
Water leak detector with temp monitoring |
| Communication |
Two-way RF, 433.1–434.6 MHz |
| Range |
Up to 800m (open space) |
| Encryption |
AES128 + jamming detection |
| Battery |
1 × CR123A (3-year life) |
| Mount Type |
Plane/wall mount |
| Update Method |
Cloud firmware updates |
| Status Light |
Single LED (pairing, power, alarm) |
| Power Use (Max) |
144 mW |
| Operating Temp |
–10 °C to +55 °C |
| Casing |
PC + ABS, IPX5 |
| Certifications |
CE, FCC |
Extra Info
Reliable Wireless with Frequency Hopping
Unlike single-channel RF, this detector uses frequency hopping across 433.1–434.6 MHz. It drastically reduces signal collision and maintains stable connections even in busy environments like apartments or commercial kitchens.
AES128 Encryption + Jamming Detection
This isn’t just basic RF—it’s secure. Encryption protects communication with the hub or alarm system, while jamming detection triggers alerts if the signal is being intentionally blocked.
Overheat Alarm with Built-in Temp Sensor
It doesn’t just detect water—this unit also alerts if the surrounding temperature exceeds safe thresholds, helping you catch appliance faults or failing HVAC components early.
Auto-Restore Cloud Updates
The unit supports cloud-based firmware upgrades. If a cloud update fails, it can roll back automatically to a stable previous version, ensuring zero downtime or malfunction.
Q&A
Q: Does this need to be connected to a hub or alarm panel?
A: Yes, it uses two-way RF communication, typically pairing with a compatible Dahua alarm hub.
Q: How long does the battery last?
A: Up to 3 years when triggered once per day.
Q: Can it detect heat as well as leaks?
A: Yes, it has a built-in temperature sensor that supports overheating alarms.
Q: Can it be used outside or in wet environments?
A: No, it is IPX5 rated and designed for indoor use only.
Q: What happens if the firmware update fails?
A: It will automatically restore to the last stable firmware version.
Q: Does it support tamper protection?
A: No tamper switch is included, but jamming detection helps prevent signal disruption.
Q: Is the sensitivity adjustable?
A: Yes, it supports configurable leak sensitivity based on your environment.
Q: How do I know it’s working?
A: The single LED indicator shows pairing, alarm, and battery status clearly.
