This change in resistance is measured by sensors on the edges of the screen and the degree of change is measured as a touch point. When the touch screen is pressed, the flexible layers are pushed together, generating a change in resistance on both vertical and horizontal axis. The sheets are coated with a resistive substance and are kept separated by tiny dots. Resistive touch screens are made of at least two layers of flexible sheet (polycarbonate, in our case) laid atop a glass substrate.
Specifically, we use 5-wire AccuTouch Resistive Touchscreens from Elo Touchsystems. At Hope Industrial we have always used resistive sensors in our industrial touch screens.