Sauter digital pushpull force gauge fk series sauter fk 50 the sauter fk 50 is a robust digital pushpull force gauge that has been designed to be easy to use the ergonomically engineered case is comfortable for manual use but can be easily used on test stands both mechanical and motorised the fk 50 has a sampling rate of 1000hz and an accuracy of 05 of the capacity of the gauge the gauge is battery powered with an auto power off function to conserve battery life adding to the practi