As Per IS : 4031, 5516, 1727, 4828, ASTM C-204, BS: 4359 Part II

The apparatus is used for determining the fineness of cement in terms of specific surface expressed as total surface area in squarecentimeters per gram of cement.

This is a variable flow type air Permeameter.

Specifications:

The apparatus consists one each ofpermeability cell 12.5cm I.D., Manometer 'U' type mounted on stand with a built in a stop cock, Perforated disc, Plunger Rubber stopper,Rubber tube 30cm long.

Spares and accessories:

Packet of 12 filter paper discs. Non-perforated disc. Suction bulb.