TTK FG-NET-LL Locating Units


  • digital, Fully Addressable
  • monitoring Up To 2400 Meter Fg-od Sense Cables
  • touch Screen Interface
  • dynamic Leak Evolution Analysis
  • tcp/ip & Modbus/jbus Connection
  • exclusive For Fg-od Sense Cable

TTK FG-NET-LL is designed and developed for the Oil & Gas industry on long distance application (“LL” significant “Long Line”), such as leak detection and location in pipelines and fuel distribution networks (airports). In addition to preceding all the benefits of FG-NET unit, this “Long Line” version unit is capable to monitor up to 2400 meter (120 cables x 20m) FG-OD sense cables. In the event of one or several leaks in contact with the sense cable, the microchip integrated in each sense cable transmits the leak information to FG-NET-LL. The unit triggers an alarm and reports to BMS. Operator can get immediately the accurate leak location, leak detected time and other detailed information from the BMS screen or directly from panel’s screen. Remote operator can be also informed by email alerts. The unique feature “Dynamic Leak Evolution Analysis” consists of analyzing the magnitude of a leak and its evolution in time through the alarm logs. The number and sequence of addressable sections which report a leak, together with their timestamp, allow the operator to monitor the leak’s progression in time.


Compatibility Digital sense cable and point sensor: FG-OD, FG-ODC, FG-ODR, FG-ODP
Satellite devices: FG-BBOX, FG-BBOX-LL, FG-RELAYS
Diversion box: FG-DEx
Accessories: ‘‘TTK 8771’’ jumper cable, FG-CLOD, FG-TMOD, FG-NOD (x)
Dimensions & Weights Wall mounted W: 228 mm H: 303 mm D: 67 mm Weight: 2.3kg
Rack mounted W: 483 mm H: 177 mm D: 74 mm Weight: 3kg
Maximum Length of Sense Cable 3540 meters (3 circuits x 59 cables x 20 m)
(connected with 1000m jumper cable and Zener barrier MTL7760ac or equivalent)
Accuracy Concerned sense cable
Operating Languages English, French, German
Voltage Input 100 to 240 VAC, 50-60 Hz
Power Consumption 36VA Max
Working Temperature Range 5°C to 40°C
Working Humidity Range  5% to 80% non-condensing
Relay Types Volt free dry contact (NO, NC, COM)
Realy Numbers 9 (8 + 1 power failure relay
Serial Connection MODBUS/JBUS RS232 or RS422/485
Maximum Switching Voltage 125 V AC and 220 V DC
Maximum Switching Capacity 60 W (30V x 2A)
Ingress Protection IP40 – Indoor use only

Identification Codes

FG-NET-LL (Wall mounted / Rack mounted) Long line digital unit for hydrocarbon leak detection sense cables in wall mounted in plastic enclosure / in rack mounted in 19” & 4U
FG-BBOX Digital black box 100-240V
FG-RELAYS Digital 24 external relays box 100-240VAC 1.3A 50/60Hz
FG-OD/ODC/ODR3, 7, 12, 20 Digital sense cables in lengths of 3m, 7m, 12m, 20m
FG-ODLxxyy/xxyy/xxyy Customerized Hydrocarbon sense cable, with connectors at each end
xx= section length (3, 7, 12 or 20); yy= section numbers
i.e.: FG-ODL2004: the mounting of 4 section cables FG-ODL : 4 sections of 20m
FG-Dex ATEX bus diversion box for FG-OD hydrocarbon sense cable
FG-NOD (x) ‘‘OD bus 8771’’ jumper cable x meters with connectors


TTK FG-NET-LL Locating Units_DpstarGroup