Bess Tester PT50A measures in 1g increments

Unlike the PT50B (also available in the store), this device measures the sharpness of the knife in 1 gram increments., It is also much more accurate

Edge On Up Industrial Edge Tester PT50C

Bess Tester PT50A measures in 1g increments – Schleifjunkies

The Edge-On-Up Industrial Sharpness Tester Review

How Sharp Is Your Knife, Exactly? - Kenny Manchester.com

Edge-On-Up Home Edge Tester

85] Standard Test PT50A Sharpness Knife Digital Sharpness Tester Edge On Up Industrial Professional

How does the Edge-On-Up BESS sharpness test work?

Ermak 5 basic package – Schleifjunkies

Quantifying Sharpness II, The Sharpest Edges - Keith Nix Knives

How Sharp Is Your Knife, Exactly? - Kenny Manchester.com

Quantifying Sharpness II, The Sharpest Edges - Keith Nix Knives