4-Wire Resistive Touchscreens

4-Wire Resistive touch technology is comprised of a glass or acrylic panel that is coated with electrically conductive and resistive layers. The thin layers are separated by invisible, dielectric dots. When operating, an electrical current moves through the screen. When pressure is applied to the screen the layers contact each other, causing a change in the electrical current and a touch event to be registered.

4-Wire Resistive type touch screens are generally the most affordable. Resistive screens are very durable and can be used in a variety of environments. Clarity is not as good as some of the other technologies. This type of screen is recommended for individual, home, school, or office use, or less demanding point-of-sale systems, restaurant systems, etc.

Advantages	Disadvantages
High touch resolution Pressure sensitive, works with any stylus Not affected by dirt, dust, water, or light Affordable touchscreen technology	75% clarity Resistive layers can be damaged by sharp objects Less durable then 5-Wire Resistive technology

Touchscreen Specifications
Touch Type:	CSI 4-Wire Resistive
Cable Interface:	PC Serial/COM Port or USB Port
Touch Resolution:	1024 x 1024
Response Time:	10 ms. maximum
Activation Force:	50-120 grams per square centimeter
Positional Accuracy:	3mm maximum error
Light Transmission:	80% nominal
Scratch Resistance:	3H pencil hardness
Life Expectancy:	3 million touches at one point
Temperature:	Operating: -10°C to 70°C Storage: -30°C to 85°C
Humidity:	Pass 40 degrees C, 95% RH for 96 hours.
Chemical Resistance:	Alcohol, acetone, grease, and general household detergent
Software Drivers:	Windows XP / 2000 / NT / ME / 98 / 95, Linux, Macintosh OS