Proportional Calipers

STANDARDS : ASTM D4791

Proportional Caliper is used for the rapid and easy determination of percentage of flat particles, elongated particles, or both in coarse aggregate fractions

of 9.5mm (3/8 in) or larger.

PRS-ABPPCAL Budget Caliper 

Consists of a 6x16in (152x406mm) base plate with two fixed posts and a 13in (330mm) pivoting arm mounted between the posts so that there is an opening at each

end of the arm.

The pivoting arm adjusts by securing a pivot screw at one of four threaded positions to provide end opening ratios of 1:2, 1:3, 1:4, or 1:5.

PRS-AFSPPCAL Four-Station Caliper is similar, but provides openings for all four ratios simultaneously, without the need to reposition the pivot screw.

Manual testing can be performed more efficiently. Moveable posts are also replaceable.

TECHNICAL SPECIFICATIONS 

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