Ambient air enters the VTM 650 through an omni-directional inlet designed to provide a clean aerodynamic cut -point for particles greater than 10 microns. Particles in the air stream finer than 10 microns proceed to a second impactor that has an aerodynamic cut point at 2.5 microns. The air sample and fine particulates exiting from the PM2.5 impactor are passed through a 47mm diameter Teflon filter membrane that retains the FPM. The sampling rate of the system is held constant at 1m3/hr by a suitable critical orifice. By locating all power dissipating components in a separate cabinet, the VTM 650 ensures that the temperature of the PM2.5 filter remains close to ambient temperature and there is no chance of losing volatile fractions of the PM2.5. The system uses a continuous rated, oil free pump for providing suction pressure. The standard system is supplied with a Dry Gas Meter to provide a direct measure of the total air volume sampled. VYOMTECH VTM 650 is Ambient Air PM2.5 Sampler (Fine Dust Sampler) based on WINS impactor designs standardized by USEPA for ambient air quality monitoring. Ambient Air PM2.5 Fine Dust Sampler

• Light Weight and portable cabinet design
• Rugged Design, Long operational life with smooth functioning
• Particle Collection on 47mm diameter GFA Filter Membrane