The PC220 is an ergo­nomic, hand-held measuring device with a built-in photo and video func­tion, which allows the user to monitor air par­ticles and gather environ­mental data directly on the spot. With its ISO 21501-4 conformity, the PC220 can be used for various measuring functions from testing cleanrooms and filter efficiency to monitoring burdens at workspaces and quality assurance. All measured values of the six particle size channels are shown simultaneously on the 2.8 inch colour LCD display .An additional colour indicator display with automatic acoustic alarm makes it easier to quickly detect critical particle concentrations.