For the record: that merely tells you the sizes don’t match.
It does NOT tell you which is more accurate.
You might even be dealing with “mesh” vs “micron”.
I suggest you get a microscope . See maybe: USB Microscopes so you can compare them.
If you really want to know which is more accurate, the machine shop at your local university probably has the correct tooling.
Specialized Tools
- Linear Mesh Counters (PIC Gauges): These are specialized hand-held magnifiers with a built-in calibrated scale used for quick, on-site measurements of mesh count.
- Optical Comparators/Profile Projectors: These project a magnified image of the mesh onto a screen or sensor for detailed measurement and quality control, especially in an industrial setting.
- Densi Meters (Lunometers): These instruments use an optical phenomenon (moiré patterns) to quickly determine the thread count or density of a mesh.
It’s even possible that it is the material rather than the actual pore size that is responsible for the difference you’re seeing…