... 2LB-filter semiautomatic Smoke meter, which is produced according to the national standard GB/T11798.5-2001 and GB3847-83 ... , can be used to detect the smoke level of diesel car ,the combustion ... : Rb ). SV-2LB, equipped with Nixie tube, is easy to operate by Prompt lamp and separately displays the lasted three ... : 5m.Products show: SV-2LB Smoker Meter for Diesel Gas Engine