header piping2
Piping Systems & Welding
leak-detection

Continuous Cable Leak Detection

PAL-AT® System

Continuous leak detection sensing cable offers the most accurate method of leak detection. Sensor cable systems are capable of locating multiple leaks without loss of accuracy and sensitivity. Leak locations can be determined to within 5 feet of source. Sensor cables utilize Time Domain Reflectometry technology as the basis of leak detection. The technology operates similar to radar. Thousands of times each minute, safe energy pulses are sent out on the sensor cables. As these energy pulses travel down the cable, reflections are returned to the monitoring unit and a "map" of the reflected energy from the cable is stored in memory. The presence of liquids on the sensor cable, in sufficient quantities to "wet" the cable, will alter its electrical properties. This alteration will cause a change of the reflection at that location. The alteration is then used to determine the location of a potential leak to within five feet.

Ideal Applications Include:

Continuous double wall pipe leak detection sensing cable offers the most accurate method of leak detection. Sensor cable systems are capable of locating multiple leaks in pipe without loss of accuracy and sensitivity.

Features/Benefits

  • Requires engineered location of access ports
  • Requires sufficient annular space for pulling of cable; not compatible with Poly-Flo® systems
  • Precise automated detection ideal for buried applications
  • Locates leaks within five feet of source
  • Most costly leak detection option
  • Cables are generally tied-in at a central alarm location
  • Can locate multiple leaks without loss of accuracy or sensitivity
  • Can differentiate between breaks and shorts vs. a wetted cable
  • Archives information with time and date
  • RS-232 serial port communications
  • Accepts both probes and cable sensors in one sensor string
  • One cable for all liquids or multiple cables for differentiation
  • Optional U.L. Listed and FM Approved to provide intrinsically safe sensor cable output circuits for Class 1, Division 1, Groups C & D Hazardous Locations
  • Optional NEMA 4X enclosure with fan and/or heater
  • Can be used with Duo-Pro®, Fluid-Lok® systems*

*See pipe system specifications for annular space charts

Resources

Online Tools
Request a Quote
My Asahi Customer Portal
Welding Parameter Web App