Key Technologies, Inc. - Toll Free: 888-433-5303 - U.S. Orders Only

"your best source for quality products in special needs - literacy - assistive technology - workshops"

When ordering an add-on touch screen for desktop monitors make sure you order 

the correct size.  The following method works well:

1.  Measure from the upper-left corner diagonally to the lower-right corner of your monitor's GLASS screen.

2.  Apply that measurement to one of the formulas below to identify the proper size touch screen.

   Your Screen's Measurement                                       =            Size Touch Screen Needed

              Exactly 15" or less                                                 =                    13"-15" Touch Screen

 Greater than 15" and up to (but no greater than) 17"      =                    16"-17"  Touch Screen

 Greater than 17" and up to (but no greater than) 21"      =                    19"-21" Touch Screen