DESCRIPTION:
Mono and Stereo Best Buy and Highly Recommended Award winning product-- Riverstone Audio's Record-Level Stylus Tracking Force Gauge.
Visit us at Riverstone Audio store
https://www.amazon.com/dp/B01N7H52GL
and https://www.riverstoneaudio.com/record-level-stylus-gauge-graphite
See Mono and Stereo's recent review:
https://www.monoandstereo.com/2019/04/riverstone-audio-vertical-tracking.html
and a recent review by Analog Dept.:
http://www.theanalogdept.com/river_vtf.htm

A Professional Grade digital tracking force gauge designed for vinyl record purist's interested in precise measurement of vertical tracking force (VTF) at the correct vertical tracking angle (VTA). When used with the detachable cantilevered extension arm, the gauge closely approximates the vertical position of the stylus on the surface of a vinyl record when it is playing on a turntable- providing accurate “record-level” measurement of tracking force.

With Riverstone's VTF gauge, tracking force is measured 2 mm - 3 mm from the surface of a turntable mat - the height of a stylus tip resting on an LP record (LP's have a thickness range of 1.9 - 2.9 mm). With less expensive gauges, the measurement distance is typically 6 mm- 8 mm - which can lead to errors in VTF measurement. To ensure accurate VTF measurement, our VTF gauges undergo a rigorous multi-point calibration procedure to verify the linearity, repeatability and accuracy of the VTF measurement.