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Off the shelf or custom engineered...yeah, we've got a switch for that.
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Intensely engineered, high-voltage reed switches. How many volts can we help you handle?

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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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Medical & Implantable


Because of their micro-miniature size, low consumption of power, and extreme reliability, HSI sensors are the premier choice for critical medical applications.

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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News Center

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

HSI Introduces the World’s Smallest Form B

HSI Introduces the World’s Smallest Form B
“This switch is the first new technology to hit the reed switch market in over 50 years,” says David Posey, HSI Sensing’s CEO and Chief Technology Officer. Read More