Differences Between Ball Grating Rulers and Magnetic Grating Rulers

Ball grating rulers and magnetic grating rulers are measurement tools with different principles and uses.

Ball grating rulers rely on optical diffraction through grids and can achieve very high precision (sub-micron) but usually over small ranges. Magnetic grating rulers use magnetic stripe patterns and a read head to produce electrical signals as the scale moves; they are robust and suitable for industrial ranges from centimeters to meters.

Ball grating instruments typically require stable optical conditions and more complex analysis, while magnetic grating rulers are simpler to use and more tolerant of harsh environments.

Choose the appropriate tool based on precision, range, and environmental requirements.