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Advanced Liquid Leak Detection Systems for Piping and Semiconductor Applications

PermAlert, a key division of Perma-Pipe, specializes in cutting-edge liquid leak detection systems. With a rich history dating back to 1988, our PAL-AT and LiquidWatch systems utilize coaxial cables and probes to detect and locate leaks in various applications, including data centers, clean rooms, containment piping, and more. We offer customizable monitoring solutions capable of overseeing up to 64 probes, ensuring rapid response to leaks and minimizing damage. With a focus on reliability and innovation, PermAlert is a trusted leader in liquid leakage prevention.

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Advanced Liquid Leak Detection Systems for Piping and Semiconductor Applications

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  1. Liquid Leak Detection/Location Systems for piping, raised floors, semiconductor tools, containment piping, fuel systems and other applications

  2. Company Profile • PermAlert is part of Perma-Pipe the largest prefabricated – preinsulated pipe manufacturer in the US • PAL-AT Leak Detection was introduced in 1988 and was the reason for founding PermAlert ESP • Sales Volume of the parent corporation (MFRI) is about US $178 million with over 500 employees worldwide

  3. PAL-AT Cable Systems and LiquidWatch Probe Systems • PAL-AT uses coaxial cables and probes to monitor for liquid leakage. The system can detect and locate leaks, breaks and shorts on the sensor cable as well as probe activations. • LiquidWatch is a probe monitoring system and can monitor up to 64 probes from a single panel. The probes are monitored for activation, breaks and shorts.

  4. Time Domain ReflectometryPAL-AT • TDR is a cable measuring technology related to sonar and radar. By sending energy pulses down the center conductor of a coaxial cable and measuring the reflected energy to the outer braid a map can be stored of the cable and monitored for change. When change occurs the type of alarm and its location is displayed on the panel.

  5. TDR Trace of Dry Cable

  6. TDR Trace with Leak Detected

  7. TDR Trace of System with Wet Cable

  8. TDR Trace showing Growing Leak

  9. Map 3 Response

  10. Second Leak Detected

  11. Monitoring with Liquid on the Cable

  12. Break Detected

  13. Short Detected

  14. Probe Activated

  15. PAL-AT Panels • AT20C - Monitoring up to 2,000’ (600 m) on a single cable • AT50C - Monitoring up to 5,000’ (1500 m) equivalent length on a single cable • AT20K - Monitoring up to 7,500’ (2500 m) equivalent length per cable with a maximum of two cables • AT40K - Monitoring up to 5,000’ (1500m) equivalent length per cable with a maximum of eight cables • AT80K - Monitoring up to 7,500’ (2500 m) equivalent length per cable with a maximum of eight cables

  16. Types of CablePAL-AT • AGW Gold Sensor cable for use in containment piping, trenches, trays and subfloors • AGT Gold Sensor cable for use in subfloors and trays. More sensitive than AGW • TFH Sensor cable for detecting hydrocarbons and solvents while ignoring water TFH • TFH

  17. Types of ProbesPAL-AT and LiquidWatch • PHL/PWS Solid state probes for hydrocarbon and conductive liquids • PSTV/PTHL/PFS Float switches for high/low level • PT10 (PAL-AT) Probe integrators and PA-10 (LiquidWatch) Probe Adaptors for dry contacts

  18. LiquidWatch • LiquidWatch has two basic panels. The LW64 is for use in normal classified probe locations while the LW64IS provides a UL Listed System for monitoring in Class 1, Division 1 Groups C & D locations. The basic panel monitors up to eight probes with modules being added for additional probe requirements.

  19. Applications • Raised Floors - Data Centers, ISPs, Clean Rooms Telecommunication, Semiconductor, Office Bldgs Pharmaceutical • Piping - Containment piping, single wall piping, hydrocarbon piping, waste drains • Trenches and Trays - Under wet benches, piping and equipment • Generators, Electrical Switch Gear and Transformers for hydrocarbon leakage or water seepage • What ever needs liquid leakage detection that a probe or sensor cable can be used

  20. Palcom SoftwarePAL-AT and LiquidWatch • Palcom allows remote control of up to 254 panels with the ability to review TDR traces, review the history of each unit and to pull down a Cad drawing for each system for location of leaks, breaks, shorts or probe activation's.

  21. Archive Data • POWER LOST AT 8985 ON 18/95 RESTORED AT 0853 ON 5/8 • YEAR CHANGED FROM 29 TO 98 AT 0853 ON 5/8 • CABLE 1 SETUP, WITH LENGTH OF 514 FEET AT 0921 ON 5/8 • LEAK DETECTED IN CABLE 3 at 225 FEET AT 1157 ON 5/8 • ALARM ON CABLE 3 SILENCED AT 1157 ON 5/8 • CABLE 4 SETUP, WITH LENGTH OF 538 FEET AT 1208 ON 5/8 • SECURITY CODE 1 ENTERED, LEVEL 250 AT 1210 ON 5/8 • NEW CABLE 4 REFERENCE, STORED AS MAP 1 AT 1210 ON 5/8 • CABLE 4 MONITORING ON, MAP 1 AT 1210 ON 5/8/98 • CABLE 4 RETURNED TO NORMAL AT 1211 ON 5/8 • SECURITY CODE 1 ENTERED, LEVEL 250 AT 1217 ON 5/8 • CABLE 3 SETUP, WITH LENGTH OF 833 FEET AT 1217 ON 5/8 • NEW CABLE 3 REFERENCE, STORED AS MAP 1 AT 1217 ON 5/8 • CABLE 3 MONITORING ON, MAP 1 AT 1217 ON 5/8/98 • CABLE 3 RETURNED TO NORMAL AT 1218 ON 5/8 • SECURITY CODE 1 ENTERED, LEVEL 250 AT 1225 ON 5/8 • CABLE 2 SETUP, WITH LENGTH OF 815 FEET AT 1225 ON 5/8 • NEW CABLE 2 REFERENCE, STORED AS MAP 1 AT 1225 ON 5/8 • CABLE 2 MONITORING ON, MAP 1 AT 1225 ON 5/8/98 • CABLE 2 RETURNED TO NORMAL AT 1226 ON 5/8 • SECURITY CODE 1 ENTERED, LEVEL 250 AT 1231 ON 5/8 • CABLE 1 SETUP, WITH LENGTH OF 514 FEET AT 1231 ON 5/8 • NEW CABLE 1 REFERENCE, STORED AS MAP 1 AT 1231 ON 5/8 • CABLE 1 MONITORING ON, MAP 1 AT 1231 ON 5/8/98 • CABLE 1 RETURNED TO NORMAL AT 1232 ON 5/8 • **********End of Archives**********

  22. Benefits of PermAlert’s PAL-AT • Wet cable startup • Multiple Leak location capability • Location of Breaks • Detection of Shorts versus Leaks • Not susceptible to contamination from dirt/dust, etc. • Archive History Data • UL Listed, FM Approved, CE Approval available Class 1 Div 1 Groups C & D Sensor Circuits • Up to 8 circuits and 7,500’ (2500 m) per circuit • Corrosion resistant sensor cables • Different cable types on the same circuit • EPA third party tested

  23. Benefits of LiquidWatch • Modular in design allowing for easy expansion • Monitoring of probes for activation and the leader cable for breaks and shorts • History log of events • UL Listed for Class 1 Div 1, Groups C & D locations • Different probe types • Probe adaptor to allow interface of any dry contact probe device

  24. Questions and Answer Period

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