Resistive technology

A resistive touch screen consists of two surfaces facing one another. The facing sides are coated in a conductive coating (ITO). They are separated from one another using small spacer dots. The two surfaces can either be foil on both sides or foil on one side and glass on the other. The touch screen has measuring leads with a defined resistance. When the surface is pressed, a connection is created at the touched point between the horizontal and vertical leads.
The controller interpolates the position of the input using the resulting total resistance.

The 5-wire technology used most frequently in industrial applications reacts to the pressure on the screen at the touch point, like all resistive touch technologies. Resistive touch screens can be operated directly with your fingers, while wearing gloves, with a (touch) stylus, etc. Thick tools (screwdrivers, etc.) should not be used. The following criteria are some reasons for choosing PCAP technology:

Advantages:

Requires a defined pressure from a finger
or suitable object
Suitable for medical applications, since they
can be operated with gloves or prostheses
Inexpensive to produce
High resolution
High precision
Can be used in wet rooms
Broad temperature range, can also be used
in below zero temperatures

Disadvantages:

Not multi-touch capable
(or only to a restricted extent) (two-touch)
Operating layer is stretchable polyester, which is sensitive to damage and wear, including from abrasive cleaning agents and sponges
Opacity restricted at only 70 - 80%
(appears slightly milky or cloudy)
Can be difficult to read due to ambient light
Only low resistance to many chemicals

Resistive technology

Wöhr

Input systems

Enclosures

System technology

Mechanics

Surface technology