PermAlert

Why should you use PAL-AT® liquid leak detection?


 

In most monitoring situations, just knowing that you have a liquid leak is not good enough. You need to know: Where is it? When did it occur? Where did it start? Is there more than one leak? You need accurate information and you need it now!

The sooner you pinpoint the where and what, the sooner you can begin to control and minimize damage to your facility, personnel, the environment and to your balance sheet.

 

 

 

 

 

 

 

 

 

 

 

With PAL-AT® you can have this type of information instantly. PAL-AT is a sophisticated micro-processor system with multi-sensing and remote monitoring capabilities. Its advanced technology provides dependable around the clock surveillance of all monitored areas. And it's the first system to actually help manage your risks and associated costs. 

 

How does PAL-AT work?

PAL-AT operates similar to radar by sending out safe energy pulses, two thousand times each second on the sensor cable. The reflections (echoes), generated by these energy pulses are specific to the condition of the installed sensor cable. These reflections are stored in memory as a reference map.  

The alarm unit continuously measures the cable reflections and compares them with the values of the reference map stored in memory. Liquids in sufficient quantities to "wet" the sensor cable will alter the cable's impedance at the leak location. This alteration of impedance will change the energy reflected from the cable at this location. The monitoring unit recognizes the change in energy reflection from the wet portion of cable and enters into alarm. A new reference map with the change is stored automatically allowing monitoring to continue. The alarm queue stores the alarm messages and must be cleared by the operator. The system also detects and locates breaks, shorts and probe activations. This allows for fast response to the location of the alarm for repairs or remedial action. The PAL-AT locates the point of origin of a leak or cable fault within ± 0.3% of the sensor string length or ± 6 feet, whichever is greater for water based liquids and ± 0.6% of the sensor string or ± 6 feet for hydrocarbon liquids. In the alarm mode, the unit activates output relays to facilitate the control of valves or remote alarms, while providing output to the BMS via Modbus, Palcom, audio and visual alarms, including a digital display of the distance to the leak origin at the panel.

 

 

GW-Gold is a quick drying cable, that is chemically resistant and designed to detect highly corrosive liquid leaks, such as acids, bases and solvents. Typical applications are secondary containment pipes, computer rooms, sub-floors of clean rooms and high temperature applications. 

 

 

 

AGT-Gold is a wicking cable specially designed for the detection of accumulations at a shallow depth of 1⁄16 inch of liquid. The cable is chemically resistant and designed to detect water, highly corrosive acid, base and solvent leaks in computer rooms, clean room sub-floors, aboveground single-wall pipes and equipment applications.
 

 

 

TFH-Gold is a wicking cable specifically designed to detect only hydrocarbons. This cable may be direct buried in slotted PVC screen pipe to a maximum depth of 20 feet to locate fuel leaks while ignoring the presence of water. This cable is ideal for monitoring single-wall pipes and tanks. 

 

 

For water purpose, chemicals solvents...

With PAL-AT's sensor technology, the system is not subject to false alarms caused by dust or other non-liquid conductive materials that may come in contact with the cable or from casually stepping on the cable.  In some applications, the sensor cable can be dried and reused after a leak is repaired and clean up has been completed. The state-of-the-art "Gold cables" have no exposed metal and are designed for corrosive chemical applications. The length of sensor cable that must be "wetted" with a specific liquid, before an alarm condition occurs, is referred to as the cable sensitivity. Sensitivity is a function of sensor string length and PAL-AT monitoring panel settings.