Our team has an abundance of reed switch knowledge that sometimes seems hard to contain. But here on our blog our engineers and leadership share their abundance of knowledge to give you an inside look at how we use our work ethic, creativity and passion to push the limits of sensor technology everyday. Whether we are examining how we prototype projects or imagining ways that a reed switch could help us save a little water at home, we live sleep and breath sensor technology and want to share our insights with you.

Previous Posts


Creating the Form-B Reed Switch

The two most commonly used reed switches are Form-A and Form-C devices. There are however, numerous applications that require the use of a Normally-Closed SPST (Single-Pole Single-Throw) device. Three methods exist to create this type of device from a reed switch.


Sensors in Cell Phones

Reading the Wall Street Journal this weekend I came across this article titled, “Smartphones Look for More Shine,” by Dan Gallagher and it reminded me of a time HSI Sensing contributed to the cell phone industry.


Trailer Hitch Solutions

Growing up in a small town, I had the opportunity to work various odd jobs. When I turned 16 my grandpa allowed me to use his John Deere riding lawn mower to mow several yards that I maintained during the spring and summer months. I had a small pickup and he let me borrow his trailer to transport the riding mower. This is where I encountered a need for a sensor that is still applicable today.


Behind HSI

Ryan Posey


Ryan Posey currently serves as CEO at HSI Sensing, formerly Hermetic Switch, Inc. Founded in 1968 by Posey’s grandfather, William Posey, HSI Sensing is a multimillion-dollar manufacturing company that designs, develops and manufactures reed switches, proximity sensors and other sensing technologies for clients around the world. It serves industries ranging from aerospace, agricultural, oil and...