Perfected to handle almost any size load you throw at it.
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.

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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.

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HSI Introduces a Truly Universal Reed Switch

HSI Introduces a Truly Universal Reed Switch
This Form C switch has been perfected to handle both high and low power loads, while maintaining low and stable contact resistance. Read More

HSI Invests in Oklahoma Higher Education

HSI Invests in Oklahoma Higher Education
HSI supports USAO's Ready, Set, NOW program for science and technology. Read More