Vayubodhan Upkaran Pvt. Ltd. Manufactures High Volume Air Sampler with Brushless Motor. Vayubodhan Upkaran Pvt. Ltd. Is the supplier of air pollution monitoring instruments. High Volume Air Sampler with Brushless Motor is lighter, more compact, can be carried in a car dickey and is ideal for field use. High Volume Air Sampler with Brushless Motor can be used either by mounting it on roof top vans or building or separately outside as necessary. It is used in all over the world to measure air pollution in industrial areas, urban areas, on the shop floor, near monuments and other sensitive areas. In these samplers, air borne suspended particulate [SPM] are measured by passing air at high flow rate through a high efficiency filter paper which retains the particles and provisions have been made for simultaneous sampling of gaseous pollutants also.