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.

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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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Spot On: The New Standard In Leverless Limit Switches

Spot On: The New Standard In Leverless Limit Switches
HSI introduces Spot On, a new line of leverless limit switches imagined from the ground up to sense farther and faster, and last longer than any competitive switch. Read More

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