Find Out How Sharp Your Edges Really Are

The Edge-On-Up PT50C Home Sharpness Tester provides a simple way to measure sharpness and track your sharpening results. With 25-gram resolution and easy-to-use disposable test clips included, it's designed for users who want to take the guesswork out of sharpening.

A Standard Test for Sharpness

How sharp is the edge? That is both the most important question a sharpener can ask, and possibly the hardest to answer. There are tests like cutting paper or shaving hair that are often used to demonstrate sharpness, and they are helpful to a point, but they lack the precision and standardization required to truly answer the question. However, a precise and standardized testing method is available. It is achieved using the PT50 Series Sharpness Testers from Edge-On-Up. This machine is often called the BESS Tester.

Measure and Quantify Every Edge

The PT50 Series of Edge-On-Up Sharpness Testers gives you the ability to measure and quantify the level of sharpness of any given edge. They work by measuring the force in grams required to cut through a standardized, calibrated medium. The result is a number that can be used to compare the relative sharpness of edges.

Simply lower the cutting edge down until it cuts through the test line.
Write down the results and compare to the sharpness chart.
re-threading the test media takes about 3-5 seconds.
Tare the tester and you are ready for the next test.

Use the Sharpness Chart

Any result under 200 grams is "razor sharp" and you can check your edges against the included sharpness chart. Recommended numbers are listed for a large variety of applications.

The Sharpness Testers Anyone Can Use

There are three models of PT50 Sharpness Testers. The Edge-On-Up Home Edge Tester (PT50C) Is intended for those looking for a reliable way to distinguish between a well sharpened edge and a poorly sharpened one, and everything in between. The PT50C Home Edge Tester is the most affordable tester and includes a one year manufacturer's warranty.

The Home Edge Tester Features:

5 Measurements-Per-Second Processor
25 Gram Resolution
Portable Lightweight Design
3 Button Operation
25 Disposable Test Clips Included
2 AAA Batteries Included
Instructions with Sharpness Chart
Knife Fulcrum with Safety Gel Insert

Test Medium Included

The Home Edge Tester includes the Disposable Clip System (Test clips have not yet received full BESS certification). The PT50C rounds the test results up or down to the nearest 25 grams.

Accurate Testing

While the Home Edge Tester is very accurate, the results are rounded up or down to a greater extent than the other two testers. If you want to compare how evenly a section of an edge is sharpened to another part of the same edge, then we recommend the PT50B Professional or PT50A Industrial Testers which have more accurate sensors.

The PT50C is an excellent option if you want to maintain the relative sharpness of your knives and of course, testing before and after sharpening is a game changer.