With reference to: http://www.firstpr.com.au/rwi/dfish/tact-switches/

Raw results from force testing tact switches: milli-Newtons.

Below that, displacement measurements.



ALPS unsealed

Switch     Activation    Hold

 1            1280       600
 2            1200       620 
 3            1220       630
 4            1270       600
 5            1240       610
 6            1220       550
 7            1250       550
 8            1250       600
 9            1220       640
10            1280       650 
 
Average       1243       605


ALPS sealed  

           Activation    Hold
 
 1         1570          1310   
 2         1620          1300
         
Average    1595          1305


Omron Sealed 

Switch     Activation    Hold

 1            1500       810
 2            1500       760 
 3            1470       700
 4            1500       820
 5            1480       800
 6            1470       750
 7            1480       720
 8            1520       760
 9            1460       760
10            1460       760 
 
Average       1484       764


Switch type       Activation   Holding    Delta     Delta
                  force        force      force     ratio

ALPS unsealed     1243          605        638      51.3%

ALPS sealed       1595         1305        290      18.2%

Omron sealed      1484          764        720      48.5%



Displacement distances  

 Each pixel in the zoomed-x2 images represents 0.0078125mm
 
Using these files:
	
	ALPS-non-sealed-zoom-x2.png
	ALPS-sealed-zoom-x2.png
	Omron-sealed-zoom-x2.png
	
I took measurements from:
	
  Up position to Active Force position.  I call this the "Initial Displacement".
  
  Active Force position to Hold position, though it is labelled "Down" in the
  images.  I call this the Click Displacement.
  
                        Initial                Click displacent,
                        displacement           using the active force
                                               position as the starting
                                               point and measuring to the
                                               down position
                                               
                        pixels   mm            pixels   mm
                        
ALPS unsealed 1         18                     27
ALPS unsealed 2         20                     32  

   Average              19       0.148mm       29.5     0.230mm
   
   
ALPS sealed             17       0.123mm       16       0.125mm


Omron sealed 1          19                     30                     
Omron sealed 2          23                     30
 
   Average              21       0.164mm       30       0.234mm