Automatic Standard Penetrometer - ASI-104

Used to determine the grade of bitumen. The penetration tests determine the consistency of bitumen for the purpose of grading. The depth, in units of 1/10th of a 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 the penetration for gradation.

Specifications: It consists of a vertical pillar mounted on a base provided with leveling screws. The head, together with the dial plunger rod and cone (or needle), slides on the pillar and can be clamped at any desired height. A rack and pinion and pointer assembly provides fine adjustment of the needle or cone tip to the sample. It incorporates a clutch mechanism which makes reading of penetration and subsequent resetting a simple and accurate operation.

The dial is graduated in 400 (1/10 mm) subdivisions, and the needle pointer against the figures makes for easy reading. Supplied with a bitumen penetration needle, ring weight (one each 50 gms), and two sample containers.

Accessories: Penetration cone for empirical estimation of penetration of lubricating grease, petroleum jelly, etc.

Supplied with a transistorized timer and electro-magnet incorporated in the clutch mechanism to accurately control penetration time to exact five seconds.