TTK FG-ALS8 Locating Units


  • Locating Leak Detection System
  • 8 Independent Zones
  • 8 Simultaneous Leaks can be Detected
  • Touch Screen Display
  • MODBUS/JBUS Integration

TTK FG-ALS8 is a new solution for water leak detection and acid leak detection. Same principal as FG-ALS4, it is cost effective, accurate and easy to install & to use, ideal for medium and large applications where accurate leak location is required. Eight detection zones are available on this small unit, it can control up to 100 metres of water or acid sense cable per zone. A touch-screen gives clear indications of the system status. 9 relays are integrated and RS485 serial link with MODBUS /JBUS communication protocol for interfacing with BMS is available. The FG-ALS8, Eight Zones Alarm & Locating Unit is designed to be used with TTK analog sense cables: FG-ECS, FG-ACS and FG-ECX, FG-ACX to give instant detection and location of liquid leaks (water, acid or base).
In the event of liquid leak or fault on the sense cables in any zone, the FG-ALS8 will respond as follows:

  • An audible alarm is triggered and a relay is activated.
  • The touch screen of the panel displays the zone, the location of the leak (to the nearest 1 metre) and details of the fault (the type of fault leak or cable break).
  • Event report is sent to the BMS via MODBUS /JBUS.


Compatibility Digital unit: FG-NET
Analog sense cables: FG-ECS, FG-ECX, FG-ACS, FG-ACX
Enclosure Type ABS flame retardant UL94V0
Operating Temperature  -5°C to 55°C
Serial Interface Physical Support Optoisolated two wire RS485
Serial Link Parameters 9600 baud, 8 data bits, 1 stop, no parity
Supported Protocol MODBUS, function 3
Relays Type: Leak + Cable Break 9 SPDT single contact NO-NC
Relay Max. Switching Voltage 125VAC and 220VDC
Relay Max. Switching Capacity 60W (30V x 2 A)
Power Consumption 10 W
Supply Current (typ.) 0.25A/115VAC 0.15A/230VAC
Dimension (W, H, D) 220 x 200 x 55 mm
Ingress Protection (IP) IP40

Electrical Specification

Power Supply N : Neutral / L : Line / : Earth
RS485 R1 : COM / R2 : RT+ / R3 : RT-
Cable Break Relay R1 : NO / R2 : COM / R3 : NC
Leak Relay  R1 : NO / R2 : COM / R3 : NC
FG-CLC Leader Cable A : Green wire / B : White wire / C : Black wire / D : Red wire

Identification Codes

FG-ALS8  Eight zones alarm & location system unit
FG-ECS, FG-ACS and FG-ECX, FG-ACX Water or acids sense cable in 3m, 7m, and 15m in length
FG-CLC Leader cable of 3.5 metres length
FG-TMX End termination plug
CF-EC100 100 hold-down clips with glue
ES-EC 40 tags


TTK FG-ALS8 Locating Units_DpstarGroup