Earthquake Safety Systems, Inc.
In order to reduce the potential for injury to plant personnel and first responders following strong motion seismic events, fire codes
typically require toxic gas users to install earthquake actuated gas shutoff systems. Most semiconductor plants already have the infrastructure
(Life Safety System, Facility Management System, etc.) to automatically shutoff toxic gas cabinets based on input from gas detection
sensors or operator emergency power off (EPO) buttons. These systems normally have 'inputs' available to receive a signal from a seismic
switch in order to 'trip' the gas cabinets. Justification to use the existing non-seismically qualified plant monitoring
systems is based on the premise that these systems can rapidly shutoff the gas at the onset of strong ground motion- before the potential
for damage to structures or systems.
For clients that want longer system autonomy, multiple output alarms, audible alarms, etc., ESS
offers the MSC-T Master Seismic Controller or the Apollo 2100 Seismic Switch. Otherwise, the smaller ESS Saturn S-001 Seismic
Switch is a good choice. Using three (3) seismic switches, users can implement a 2 of 3 voting scheme via their life safety system
in order to reduce the potential for false positives from a single alarm (i.e. large objects striking one of the seismic sensors, non-qualified
personnel accessing the seismic device, etc.).
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