When We Started
HSI Sensing began manufacturing reed switches in 1968. Continuous growth and facilities expansion have characterized the past 40 years. Manufacturing moved to our present location in 1976, and the physical plant has been expanded three times since then. The last expansion in 1998 added 15,000 square feet of manufacturing space, including a state-of-the-art electroplating facility.

What We Do
We provide custom and standard switching and sensing solutions.

What We Manufacture
HSI Sensing manufactures reed switches and proximity sensors. These devices complete electrical circuit paths when magnetism is placed in close proximity to the switch or sensor. Our production process is very precise and known for making the most difficult types of switches. We manufacture reed switches small enough to fit inside a heart pacemaker as well as sensors which meet tough military standards for installation on aircraft engines and controls.

Why Customers Choose Us
Customers choose us for our outstanding reputation in product reliability, quality, special characteristics and customer service. Our product is sold throughout the world. Many customers turn to us because we specialize in the difficult-to-manufacture products. Our custom design capability and quick response times are the keys to our success.

How We Make Our Products
Our employees receive many months of on-the-job training to develop skills in electroplating, glass sealing, electrical testing, precision cutting, and welding operations. HSI Sensing designs, builds, and maintains all of its special custom manufacturing equipment.

Where Our Products Go
We are proud of our products and the outstanding work of our employees. Pacemakers of the highest quality contain the world’s smallest reed switch, which is made in our hi-rel department. Additional application industries include aerospace, golf and turf equipment, hearing aids, valve controls, military, defibrillators, and many more unique applications where quality and reliability are required.