This article explains if touch sensitivity be adjusted on Elo products

Touch sensitivity can only be adjusted on Elo's Infrared (IR) Technology.

Infrared touch technology, shipped at maximum sensitivity, can be adjusted.  
This would normally be done to keep from sensing a touch when the screen has not actually been touched.  Because the IR beams are just above the surface of the front glass, it is possible to break a beam and generate a touch event without actually touching the glass.  Because the beams are so close to the glass, this generally doesn’t happen.  However, sometimes when a user stops to think in the middle of a touch action, they will hover just above the screen and trigger a touch event, which can be confusing.  Decreasing the sensitivity will tend to minimize such events.

There is an option to adjust IR screen sensitivity in the multi-touch driver's EloOptions.ini file.  

For instructions, see the forcemouse instructions, but change the variable below instead of the forcemouse variable.  

Be sure to change the value that is not preceded by a semicolon (semicolon indicates a comment/explanation).

IrUTR:             ; Unintentional Touch Rejection for IR monitors.

; Touch sensitivity, valid range is 0 to 5 (higher is less sensitive). Default value is 0.

The value appears in the ini file by default as:

IrUTR = 0