... diesel car, the combustion analysis SV-2LB-filter semiautomatic Smoke meterSV-2LB-filter semiautomatic Smoke meter, which is produced according ... result of exhaust concentration by the black granule on the filter paper (unit: Rb ). SV-2LB, equipped with Nixie ... The air infiltration capacity is not exceed 15ml in one minute.filter specificationwidth:40mm,thickness0.18mm,Equivalent pore diameter: 45um, ...