Advantages of Surface Acoustic

•  -Stable "No-Drift" Operation High Resolution
•  - Very Light Touch Fast Touch Response
• -X,Y and Z-axis Response Finger or Gloved-Hand Operation Disadvantages of Surface Acoustic Wave Must be touched by finger, gloved hand, or soft-tip stylus. Something hard like a pen won't work Not completely sealable, can be affected by large amounts of grease, water, or dirt on the touchscreen
• Scanning Infrared touch screen Made of a grid of LEDs and detectors framed to the front of the display that projects horizontal and vertical beams of infrared light. The press location is determined since it obstructs the IR beam
• Advantages Mostly used in manufacturing and medical applications since it can be completely sealed. operated using a stylus or a gloved finger. mechanically stronger Clearer more wear resistant Disadvantages it is very sensitive and can be activated by stray touches. Low resolution Parallax problems