DIGITNOW Digital Turntable Stylus Force Scale Gauge 0.01g/5.00g,Tracking Force Pressure Gauge/Scale for Tonearm Phono Cartridge, Blue LCD Backlight

Q: For what purpose this instrument is made , is not understood. What is it's utility ?

In a turntable there’s cartridge n stylus (needle) and every needle specs a weight specified onto the lp. It may be 2grams or 3 etc. if your needle says 2g then after your calibration check with this instrument to see if the download pressure is 2g for accuracy checking