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A precise sharpness tester that measures the pressure needed to cut a test medium and displays the result on the BESS scale in 5 gram increments.
Purpose
The Edge-On-Up PT50B is designed for sharpening enthusiasts, collectors, and anyone who wants to objectively evaluate knife sharpness.
Result
Measures the pressure required to cut a test medium and displays the result in grams. PT50B operates in 5 gram increments for practical accuracy.
Included
Includes PT50B tester, fulcrum support, and aluminum base with DoubleX test media. Compatible with test clip base.
Comparison
| Specification |
PT50A
|
PT50B
|
PT50C
|
|---|---|---|---|
| Resolution | 1 g | 5 g | 25 g |
| Measurement speed | 25/sec | 10/sec | 5/sec |
| Batteries | 2 AAA | 2 AAA | 2 AAA |
| Test clip base | Included | — | Included |
| Test clips | 25 | — | 25 |
| Aluminum fixture | Included | Included | — |
| Test media | Included | Included | — |
| Knife fulcrum | Included | Included | Included |
Video
Watch how the tester measures knife sharpness using the BESS standard.
How it works
The tester uses a certified synthetic wire. Apply pressure with the blade until it cuts through.
The device records the force required and displays it in grams. Lower values indicate a sharper edge.
Accurate testing requires certified materials. The DoubleX test medium allows up to 325 measurements.
BESS Standard
The BESS scale ranges from 2000 (dull edge) to 0 (extremely sharp). A razor blade typically measures around 50.
Testing method
Measure multiple areas of the blade — tip, middle, and heel — and calculate an average value for reliable results.
FAQs
This one comes with everything you need to use BOTH the Aluminum Test Fixture with the Test Media AND a 25 count package of the Disposable Test Clips with the Clip Base. It essentially comes with everything possible.
The Test Media is preloaded into the Aluminum Test Fixture. If you do not see a strand of media coming through one of the feed holes, slide the black rubber piece off of the bottom of the fixture. A role of Test Media should be inside.
No. The box will be empty. It is included as a packaging spacer and has been labeled "Consumables" for customers to use as future storage.
