The BESS "A" Scale
The BESS "A" scale was designed for test instrumentation that uses a 50 gram "piston" or functionally similar style assembly. The weight of the piston assembly effectively "zero's" the instrument at or near the sever point of the test media when measuring edges of the same sharpness characteristics as a DE razor blade. Generally this scale and instrumentation style is used when a very high degree of precision is required.
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