Product Details A professional tracking force gauge designed for vinyl record enthusiasts interested in precise measurement of vertical tracking force (VTF). For accurate VTF measurement, the stylus tip must be at the same vertical position as the record surface — that is, at “record level.” With this professional VTF gauge, vertical tracking force is measured approximately 2 mm to 3 mm from the surface of a turntable mat or platter — matching the height of a stylus tip resting on an LP record (LP thickness ranges from 1.9 mm to 2.9 mm). The gauge arm positions the stylus tip at the correct height without requiring removal of the platter mat. Less expensive gauges typically measure stylus tip force at distances between 6 mm and 10 mm, which can introduce measurement errors. To minimize magnetic interference with moving magnet (MM) and moving coil (MC) cartridges, the gauge body is made from durable plastic, and the detachable cantilevered extension arm is constructed from non-ferromagnetic stainless steel. Two calibration masses (5 g and 20 g) are included for recalibration (a 1-minute procedure). Using larger calibration masses (not included), the gauge can be recalibrated for use up to 100 g. A polymer pad on the measuring platform protects the stylus tip and enables accurate centering. The LED display (green) is bright and easy to read. A detailed instruction manual is included. Overall dimensions: 52 mm (W) × 91 mm (L) × 12.0 mm (H); height dimension is measured with cover removed. Note: Although no tools are required, installing the record-level extension arm requires basic technical familiarity. A tin storage box is included for protection when the gauge is not in use. All units are covered by a full two-year warranty. Requires one alkaline AAA battery (battery not included).