How long does calibration take? ATI Marketing April 24, 2018 18:45 Updated Follow Calibration takes 7-10 business days from the date we receive your unit. Related articles How much does calibration cost? 100X Product Configurator Where do I ship my unit? Aerosol Photometer Sample Flow Less Than 28.3 lpm Aerosol Photometer Calibration with DOP & PAO Comments 0 comments Please sign in to leave a comment.