handheld type USB output Remote air Particle Counter P311

                                                      Handheld Remote air particle counter - P311   Feature & benefits : Measure 3 channels of simultaneous data Long life laser diode Complies with ISO 21501-4 and JIS B9921 standards Lightweight stainless steel enclosure Easy to clean and wipe down 21years limited warranty RS485 output /USB output Removable and rechargeable AA bateries Include carrying case ,battery chrager and download software Stores up tu 8000 sample records and 199 sample locations View data records on -screen or via computer large LCD display