Biotest Hycon RCS Plus high precision air sampler great for detecting microbial substances in the air. light weight; battery operated, and uses a centrifugal force that impacts microbes onto an agar strip. Features: Range of sample volumes: min 1 liters / max 1,999 liters, Air flow rate: 50 L/ min, Tolerance: +/- 5%, Motor speed: 6,100 RPM. Please contact us for complete Biotest air sampler system and warranty details.