CORVALLIS, Ore. — We all know what smartphones are, but have you ever heard of a smart headband?

One day in the future, you just might.

It's one of more than 200 products that will be showcased at Oregon State University's Engineering Expo this Friday.

Students designed the smart headband to detect a person's electrolyte levels in their sweat. Sensors then alert that person that they are getting dehydrated through an app on their phone.

Smart headband
Sensors alert a person through an app on their phone that they are getting dehydrated.
Keely Chalmers

"Inside the headband there are these two sensors that will be placed on your forehead when you're wearing it they will detect the electrical conductance across your skin," explained bio-engineering student Molly Carpenter.

Also on display this Friday:

A golf simulator engineered specifically for players with disabilities.

And a monitoring system for those living with epilepsy that not only detects seizures in patients but one day might be able to predict when they are about to happen.

Smart headband
Students designed the smart headband to detect a person's electrolyte levels in their sweat.
Keely Chalmers

You can check out the expo Friday at the Kelley Engineering Center from 11 a.m. to 4 p.m.