Profile: Protouch Manufacturing Ltd. distributes touch screen equipment. A resistive touch screen is composed of several flexible layers, the most important of which are two electrically conductive layers, coated in transparent metal oxide and separated by a narrow gap. When a user touches the screen, the two metallic layers become connected and this causes a change in the electrical current. The change in resistance to the current is measured and processed by the touch controller which communicates this as a mouse movement or click to the computer's operating system.