Standard penetrometer tests determine consistency of bitumen for the purpose of
grading
SPECIFICATION
Depth in units 1/10 of millimeter to which a standard needle having a standard
weight will penetrate vertically in a duration of five seconds at a temperature of 25°C
determines penetration for gradation.
Standard Penetrometer consists of a vertical pillar mounted on a base provided with leveling screws. The head, together with dial plunger rod a cone (or needle) slides on a pillar and can be clamped at any desired height.
A rackand pinion and pointer assemble provides fine adjustment of needle or cone tip to sample.
It incorporates a clutch mechanism. Which makes reading of penetration and subsequent
resetting a simple and accurate operation? Standard Penetrometer dial is graduated in
400 1/10 and the millimeter subdivisions and the needle pointer against figures makes
easy reading.
Supplied with a bitumen penetration needle, ring weight one each 50 gms.And 100 gms. two sample containers