The ERM system is simply a bare copper wire embedded within the insulating foam. At field joints, the installing contractor has to crimp a short jumper cable to tie the adjacent pieces together. The installed piping system will then have a continous copper wire embedded within the foam. Since the foam is not a conductor of electricity, there will be very high resistance between the wire and the metal pipe (reading 100,000+ Ohms). This electrical resistance within the copper wire can be monitored with a simple analog Ohmmeter, purchased at any hardware store, to determine if there is a leak at any time. Alternatively, we can supply a commercially available panel to allow continuous monitoring. If water should at any time enter the foam insulation, the electrical resistance will drop drastically. Once this drop in resistance is detected, the location of the leak can be found by using a Time Domain Reflectometer (TDR) instrument.
standward: EN 14419:2019
