Product Description
AT-LD101 leak detection alarm module is used to monitor long runs of conductive leak sensing cable installed around critical equipment, pipe racks or raised floors. When water or other conductive liquid touches the sensing cable, the module detects the leak within seconds, gives an audible/visual alarm, and precisely indicates the leak location on the LCD display.
The module provides separate dry-contact outputs for “Leak Alarm” and “Fault”, and communicates via RS-485 using MODBUS-RTU protocol, which makes it easy to connect with BMS, fire alarm panels or third-party controllers. DIN-rail mounting and 24 VDC power supply allow AT-LD101 to be installed neatly inside electrical or fire control cabinets.
Key Features
Locating leak detection module for conductive sensing cable
Supports sensing cable length up to 1500 m (leader/jumper cables excluded)
Fast response time ≤ 8 s and 1 m ±2% location accuracy
LCD display shows leak position in meters; “----” for normal, “FFFF” for fault
Three LED indicators: Leak (red), Service/Fault (yellow), Power (green)
Separate relay outputs for Leak (NO) and Fault (NC)
RS-485 interface with MODBUS-RTU protocol for system integration
24 VDC low-power design, typical consumption < 0.3 W
DIN35 rail mounting, compact flame-retardant ABS housing
Cable break / wiring fault detection and indication
Typical Applications
Data centers and server rooms
Smart buildings and intelligent facilities
Museums, archives and libraries
Telecom and IDC rooms
Power distribution rooms and UPS rooms
Industrial plants and warehouses
Any area where early water leak detection is required to prevent downtime and damage
Technical Specifications
Sensing
Max. sensing cable length: 1500 m
Response time: ≤ 8 s
Leak location accuracy: 1 m ±2%
Communication
Interface: RS-485, 2-wire
Protocol: MODBUS-RTU
Serial settings: 9600 bps, 8 data bits, no parity, 1 stop bit (8-N-1)
Device address range: 1–254 (factory default 1)
Relay Outputs
Contact type: Dry contact, 2 sets (Alarm: NO; Fault: NC)
Contact rating: 250 VAC / 100 mA; 24 VDC / 500 mA
Power
Supply voltage: 24 VDC nominal (16–28 VDC)
Power consumption: < 0.3 W
Environmental
Operating temperature: −20 °C to +50 °C
Operating humidity: 0–95% RH, non-condensing
Mechanical
Dimensions (L × W × H): 70 × 86 × 58 mm
Housing material: White flame-retardant ABS
Mounting: DIN35 rail
Note: module is not waterproof and should be installed inside a suitable enclosure or cabinet
