Out-of-Stock Seismic detectors Seismic Device Sisma Lock seismic sensor for solenoid valves NRG Tech EV161.230 The SISMA LOCK® seismic detector is a device which, combined with a safety solenoid valve for gas, controls its closure in the event of a seismic event (with analysis of the accelerations on the 3 axes over time and frequency). Contact us