
HSI releases first true innovative development in reed switch technology in decades!
HSI True Form B
Uniquely Designed Reed Blades
Even with over 1500+ products to choose from, all HSI products can be modified to your specifications.

Reed Switches
Reed Switches are used in multiple industries and applications. From implantable medical devices to the oil field and even the aerospace industry, HSI Sensing offers years of experience perfecting reed switch technology, ensuring it is reliable and operates consistently in any application.


Magnets & Actuators
In applications where a reed switch signals relative motion, permanent magnets are used to provide the operating magnetic field. We offer magnets in four different shapes: square, rectangular, disc and cylindrical along with different dimensions, gauss strengths, and material composition. Our actuators are often paired with our proximity sensors for a matching magnetic sensor package. Also, many of the actuator housings provide a way to mount the magnet onto a surface.
An Industry Leader
We make the world’s smallest Form A switch, the world’s smallest Form C switch, the only switches with solid tungsten contacts, high voltage switches, RF switches, pressurized switches, and now the only true Form B switch.
Let’s Make Things Happen
Simply reach out to connect with us. We’ll discuss your project and provide solutions, unique to your specific needs.
“We are constantly looking to reimagine the way we use sensor technology in our everyday lives. Whether our engineers are looking at a chemical processing plant, a fighter jet or a pinball machine, we are imagining the way that we can use our products to make those technologies better.”
Ryan Posey
HSI Sensing, CEO