The ANWETECH AT-LD101 Water Leak Detection Cable System is designed to monitor water leakage and other conductive liquid leakage along a sensing cable route. It is suitable for areas where early leak detection and accurate leak location are important, such as data centers, IDC rooms, archives, libraries, warehouses, equipment rooms and smart buildings.
When water or conductive liquid touches the leak sensing cable, the AT-LD101 module detects the change, activates the alarm output, and displays the leak location on the LCD screen. The leak position is shown in meters, helping maintenance teams quickly locate the leakage point and reduce inspection time.
The system supports RS485 communication with MODBUS-RTU protocol, allowing integration with BMS, PLC, monitoring panels or remote alarm systems. It also provides dry contact relay outputs for leak alarm and fault indication.
The following accessories may be used according to the project design and installation layout:
Note: Accessory length, material and package quantity should be confirmed according to the project requirement.
| Category | Parameter | Specification |
|---|---|---|
| Model | Product model | AT-LD101 |
| Detection type | Detection principle | Conductive liquid leak detection via sensing cable |
| Sensing cable | Maximum sensing cable length | 1500 m |
| Sensing performance | Response time | ≤ 8 s |
| Sensing performance | Detection accuracy | 1 m ± 2% |
| Display | Leak location display | LCD display, unit: meter |
| Communication | Interface | RS485 |
| Communication | Protocol | MODBUS-RTU |
| Communication | Serial settings | 9600 bps, N, 8, 1 |
| Communication | Device address | 1–254, default 1 |
| Relay output | Contact type | Dry contact, 2 sets |
| Relay output | Alarm output | Normally Open, closes during leak alarm |
| Relay output | Fault output | Normally Closed, opens during fault |
| Relay rating | AC rating | 250 VAC / 100 mA |
| Relay rating | DC rating | 24 VDC / 500 mA |
| Power supply | Supply voltage | 24 VDC nominal, 16–28 VDC range |
| Power consumption | Power | < 0.3 W |
| Environment | Operating temperature | -20°C to +50°C |
| Environment | Operating humidity | 0–95% RH, non-condensing |
| Mechanical | Dimensions | 70 × 86 × 58 mm |
| Mechanical | Housing | White flame-retardant ABS |
| Mechanical | Mounting | DIN35 rail mounting |
| Item | Data |
| Maximum sensing cable length | 1500 m |
| Response time | ≤ 8 s |
| Leak location accuracy | 1 m ± 2% |
| Leak location unit | Meter |
| Normal LCD display | “----” |
| Fault LCD display | “FFFF” |
| Leak LCD display | Numeric leak location in meters |
The AT-LD101 module connects to the leak sensing cable through dedicated sensing cable terminals. The leak location is calculated from the start sequence of the sensing cable. Leader cable length is not included in the displayed leak location.
The module provides two relay outputs:
The relay outputs are dry contacts. They are suitable for signal input to fire alarm panels, BMS, PLC, monitoring panels, sounder circuits or remote alarm modules. For high-current or high-voltage equipment, an interposing relay must be used.
The RS485 port supports MODBUS-RTU communication. It can be connected to a BMS, PLC or remote monitoring system to read module status, cable fault status and leak location.
The AT-LD101 module should be installed inside a control cabinet, electrical enclosure or waterproof box. The module itself is not designed for direct outdoor or wet-area exposure.
The sensing cable should be installed along the potential leakage path, such as under water pipes, around equipment bases, under raised floors, near drainage channels, around storage areas or along perimeter risk zones.
Installation notes:
