Work faster, harder, and farther than you ever imagined.

Stable contact resistance from 30 mW to 100 watts.

HSI presents the world's smallest Form B reed switch.

Off the shelf or custom engineered...yeah, we've got a switch for that.

We engineer custom sensors for the world's most critical missions. Let us engineer yours.

Intensely engineered, high-voltage reed switches. How many volts can we help you handle?


Custom Engineering

Your project is full of possibility. But to make it work, you need a custom-designed sensor at the leading edge of its capability. You need HSI Sensing.

Making Sense

custom engineering

Subscribe today for late-breaking insights and discoveries about sensing technology, from the guys who know it better than anyone.

Security

security

HSI's trusted line of fully customizable, smart magnetic sensors are tamper-proof by design, and the only choice when access point security failure is not an option.


HSI Sensing

HSI Sensing is the innovative leader in the engineering, design, and precision manufacturing of custom reed switch and sensor technology. The industry experts at solving problems for customers in challenging design applications, we also precision manufacture those solutions for consistent, unmatched quality.

HSI corporate headquarters

News Center

HSI Expands Its Reach Beyond Oklahoma

07/27/2015
HSI Expands Its Reach Beyond Oklahoma
HSI has opened a new development lab in Madison, Wisconsin that will focus on manufacturing technology, processes, and efficiencies. Read More

CTO David Posey Demonstrates Spot On

07/22/2015
CTO David Posey Demonstrates Spot On
Posey explains why HSI leverless limit switches work faster, farther, and harder than any other switch on the market. Read More