Monitoring systems
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Monitoring system - Ni-Cr wires (DELFIN)
Description: The DELFIN monitoring system, proposed by INPAL Energie, consists of 2 Ni-Cr (Nickel Chromium) alarm wires inside the insulation of the pipes and accessories. The system is based on the quantity of electricity conducted by the insulation. Depending on the amount of moisture of the polyurethane foam, the electrical resistance between the service pipe and the foam decreases. (...)
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Monitoring system - Copper wires (Nordic)
Description: The Nordic monitoring system consists of copper alarm wires and currently represents a reliable and economical solution in terms of installation and operation. The alarm wires are robust and easy to install when assembling pre-insulated pipes. The maximum length is 7000 m in detection and 2500 m in fault localisation. Consequently, this is currently the most widely used system, (...)
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