Checkline F-1101-30 Dial Foil Thickness Gauge, Measuring Range 1 mm, Feeler 6.35 mm with 30 mm Jaw Depth. Resolution: 0.001 mm (1 µm), Measuring range: 1 mm, Accuracy: ± 3 µm, Depth of jaw: 30mm. The Checkline F-1101-30 Foil Dial Thickness Gauge is used exclusively to measure the thickness of foils. The frame has the required rigidity, the insulation of the handle prevents transfer of heat from the hand of the user to the sensitive mechanical parts of the Dial Gauge. One revolution of the pointer equals 0,1 mm. Because of the 100 divisions on the scale the measuring result can be more easily and more accurately read off then on the predecessor model F 1000/30. The applied pressure is approximately 2 N.