JMT - 506
LEA AND NURSE AIR PERMEABILITY APPARATUS
IS : 5536, 8425, BS : 12, 1370, 146 & 915.
The method and results obtained from this apparatus depend upon the rate at which air flows under a given pressure gradient through a bed powder of known density and voids content, in order to determine the surface area of the individual particles.
The complete equipment comprises of one air permeability cell lea and nurse type for areas 500 to 10000 sq.cm/gm. complete with perforated plate one capillary tube, one plunger for compaction of sample and a wooden case.
Air source, comprising one pressure chamber fitted with a value, regulator, connecting tube, a toot pump and two drying towers. Manometer liquid in 500ml bottles.