4-Wire Resistive Touchscreens 
 

4-Wire Resistive touch technology consists of a glass or acrylic panel that is coated with electrically condictive and resistive layers. The thin layers are separated by invisible separator dots. When operating, an electrical current moves through the screen. When pressure is applied to the screen the layers are pressed together, 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. Although clarity is less than with other touch screen types, resistive screens are very durable and can be used in a variety of environments. 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 a sharp object Less durable then 5-Wire Resistive technology   Touchscreen Specifications Touch Type: 4-Wire Resistive Screen Sizes: 12"-20" Diagonal 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 centimer Positional Accuracy: 3mm maximum error Light Transmission: 80% nominal 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