Opacity meter and diesel smoke opacity meter is distributary sample type. it equips gas temperature pressure and distributary control cell in order to ensure metrical stability and repeat. It can measure the whole burthen opacity smoke degree continuously and free speedup opacity smoke degree. An innovative product which uses latest technology of world, Vibration & Sound type RPM Sensor, Without help of this technology testing of diesel vehicles was never so easy. It senses engine RPM quickly after attaching it anywhere on engine. Available in both the options : RPM with Battery Type T