Grayhill, Inc. designs and manufactures a broad line of intuitive human interface components and custom solutions that make life simpler, safer and more efficient. Standard products include optical encoders, rotary switches, keypads, joysticks and pushbuttons. Our components can be customized for your application or integrated into a complete front panel solution. Grayhill specializes in creating custom operator interface panels and portable product shells that integrate our components, displays and wired or wireless communications into an ergonomic, user-friendly device.
EAO Corporation is a technology leader in Human Machine Interface (HMI) Systems and Components. Founded more than 60 years ago in Olten, Switzerland, EAO is a global manufacturer of a full line of HMI Components, including switches and keypads, as well as complete HMI Systems.