The most rugged switches in the world for high voltage applications

No matter how intense your specifications, HSI’s comprehensive line of high-voltage reed switches are engineered for the unique demands of fluid processing, reed relays, and other voltage-intensive applications including. Pair them with a custom housing for a solution that’s tailor-engineered and guaranteed for millions of cycles.

Our line of high voltage switches can be delivered in as little as three weeks

High Voltage Checkboxes
  • Consistent, reliable operation rated for millions of cycles
  • Hermetically-sealed tungsten contacts engineered for extended life in extreme environments
  • Outside lab certification available upon request
  • The sensitivity, footprint, and housing of anyswitch can be customized for your application


  • Industrial/Chemical Plant Valve
  • Position Signaling
  • Hazardous Chemical Level Detection
  • Liquid Level Signals
  • High Voltage Relays
  • Medical Test Equipment
  • Defibrillators
  • Power Grid Applications

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From 'Making Sense' Blog

HSI Sensing Recognized in the 2019 SIA New Product Showcase at ISC West

Sentinel Retro – PRX+12215 was announced as the winner of the Intrusion Detection and Prevention Solutions at the flagship annual award program at ISC West. The Security Industry Association (SIA) has named HSI Sensing as an award winner at the 2019 SIA New Product Showcase Awards, the flagship awards program at ISC West recognizing innovative … Continued