Suitable for: Control Rooms, Industrial Processes, Systems, Motors, Electronic Doors, Personnel Safety Alarms – via existing P.A. systems, Elevators, Solenoids, and O.E.M. applications.

Compliance with ASCE 25-97, ASME A17.1, and CA3137 is achieved with this highly flexible, state-of-the-art technology.

Provides emergency control or shutdown and reports local XYZ peak earthquake intensity data in “g” force.



A ready-to-install UL 508 robust seismic switch, complete with three Form C control relay outputs providing dry, isolated Form C contacts, battery back-up, and external charger. Detects “P” & “S” waves. Sensor control setpoint (trigger level) is user-selectable to local requirements. NEC Electrical Code compliant (operator not exposed to electrical circuits for RESET or TEST). Following a seismic trip, the system is either held in protective ‘latched’ position until manually reset or programmable for momentary trip (1 to 60 seconds). For use in protected industrial and commercial environments.

The maintenance-free, solid-state digital, tri-axial seismic sensor measures earthquake intensity in “g” force on X, Y & Z axes and in real-time outputs Peak Ground Acceleration values (PGA) corresponding to the seismic trip for system performance review. Filtering devices make it immune to industrial vibrations such as heavy equipment, trucks, compressors, trains, etc. Proven performance next to rail lines, factory environments, etc. 2/2 or 2/3 voting via multiple seismic switches is recommended for extremely cost/safety-sensitive applications.

Internal terminal block provides a simple field wiring termination for power and control relay outputs.


SensorsSolid state, triaxial accelerometer in three orthogonal axes. Detects vertical “P” and horizontal “S” wave earthquake acceleration (X, Y & Z axes). Stores and displays Peak Ground Acceleration (PGA) values on each axis, in “g” when triggered.*
Frequency Response1 Hz – 10 Hz or, 1 Hz – 15 Hz as programmed. Sensor filters non-earthquake (industrial) vibrations. User-adjustable for ASCE 25-97, ASME A17.1 & CA3137 trigger response.
SetpointsUser selectable from 0.025g to 0.5g on each axis (X, Y & Z). Terminal communication program supplied with instrument.
CommunicationsRS-232C serial (3-wire) or USB for programming & PGA data recovery.
DiagnosticsPower-On Self-Test (POST) and diagnostic commands.
LED indicators“Seismic Trip”; via internal LED indicator and integral lamp in front panel Test/Reset switch.
Seismic ActivationFront panel visual indicator, Form C relay contacts.
Control OutputThree independently programmable alarm output control relays. Form C, dry, isolated alarm relay contacts rated 4 amps @ 250 VAC). Unit provides one (1) common fault alarm (power or sensor) and two (2) seismic alarms. Following a seismic trip, system can automatically reset after delay OR remain latched until manually reset via front panel switch.
Power Supply (UL)120 VAC, 50 / 60 Hz or 220 VAC, 50 Hz (specify). Rechargeable 12 VDC, 1.2 Ah Sealed Lead Acid battery. 1+ hr reserve at maximum demand. External charger.
PhysicalSize, 8″ W X 8″ D X 5″ H; 9 lbs (19 lbs w/ mounting plate) Enclosure NEMA 4 standard. Options include: NEMA 4X, bypass switch and/or vertical mount Sealed cable and conduit entry fitting. Operating temperature, -20º C to + 70º C. Humidity, 0% – 95% (non-condensing).
InstallationVia four ¼” bolts (one bolt for optional plate), rigidly attached directly to building slab or other large, inertial seismic mass. Mounts horizontally. Vertical (wall-mount) unit optionally available.


Saturn S-001
Saturn S-001





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