UV absorption ozone meter is a portable unit used to measure ozone concentrations. A built-in printer facilitates to direct printing of records.Ozone measurement range=0-ppm-sim-100-ppm-0-ppm-sim-1000-ppm; Flow rate=1-l-min; Accuracy=0-01-ppm; Measuring time=10-seconds; Boot time=le-10-min;Shop Online at Labtron.us