This method described in EN933-4 measures the ratio of length to width of individual aggregate particles using a vernier calliper and a specially designed 3:1 length gauge.
Designed to measure the ratio of length to width of individual aggregate particles.info »
Vernier callipers 200 x 0.002mm. Graduated in mm and inches.
Gives four types of readings: inside, outside, depth and step. Dual reading scale (metric and inch) with 14° bevelled vernier scale for reduced parallax reading error and knurled locking nut. Manufactured from hardened stainless steel for rigidity. Satin finish.
Conforms to DIN 862.info »
Dual measuring range highly accurate vernier caliper 0 to 200mm x 0.01mm (8 inch x 0.001 inch). Complete with liquid crystal display.
Complies to EN 933-4.info »