| TECHNOLOGY |
SURFACE
ACOUSTIC WAVE (SAW) |
Optics/Clarity
|
90%
light transmission, excel clarity |
Durability
|
Excellent,
contains overlays, all glass panel |
Reliability
|
Very
High |
Accuracy, Calibration
Stability
|
Extremely
consistent, very stable |
Activation Sensitivity
|
Soft
objects, non-gloved, requires significant contact |
Touch Resolution
|
Very
high (>20 pts./in.) |
Response Time
|
10-15
Milliseconds |
Stylus
|
Soft
only |
Sealing
|
Must
seal in active area with low acoustic absorption material |
Parallax
|
Low |
Z-Axis
|
Yes
- 255 levels pressure |
Multiple touch
|
Rejects
simultaneous pressure |
Touch Life
|
Many
millions of touches |
Controllers Available
|
RS-232
serial, PC-Bus or Mac ADB |
Maintenance Required
|
Difficult |