About us

Welcome to Seismic Switch, the leading provider of Seismic Switches for over 45 years. We provide earthquake safety equipment primarily for the elevator industry, but also for other industrial applications.

We are pleased to announce the CHV-2 is now UL and cUL approved! We've sold over 10,000 CHV-2 Seismic Switches since they were first introduced in 2008. Now you can help protect your passengers and elevators. Seismic Switch units can disable or deactivate any elevators which may become life endangering or self destructive during an earthquake. Based on our patented CHV-1 Seismic Switch, our proven units are designed to reliably respond to only earthquake motions and to reject interference or false triggering from man made and non-earthquake motions. We invite you learn more about our unique company and look forward to hearing from you to see how we can be of service!

Our Commitment

We create the world's most reliable earthquake motion detectors to ensure the safety of your passengers.

Our Story

Seismic Switch, Inc. is a 2nd generation family-owned and operated business.

Chief designer Larry Miller invented the industry standard and patented CHV-1 Seismic Switch and developed the CHV-2. We have been in business for 45 years and offer unparalleled products and customer service. We offer lifetime technical support and maintenance for all of our products. We pride ourselves on manufacturing our products in the United States.

Leah Kleinman Green, CEO of Seismic Switch.Leah is the CEO and has been with Seismic Switch for 18 years. She has a Bachelors degree from UCLA and MBA in Management from the University of San Francisco. Leah oversees the day-to-day operations of the business. Leah is a member of Earthquake Engineering Research Institute (EERI).

The Next Generation

Keeping passengers safe, big and small alike.

We're already grooming the 3rd generation of the family business. Meet our newest team members.

Lily may only be in the 3rd grade and Lila is in pre-school, but Leah often brings her daughters into the office. The shipping area with boxes and bubble wrap provides countless opportunities to create structures and, of course, pop individual bubbles in the bubble wrap :)


Otis Elevator
Thyssen Krupp
Mitsubishi Elevator

Contact Us!

Seismic Switch

889 4th Street

San Rafael, CA 94901

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Phone: (415) 492-1200