Eco Sensors A-21ZX Ozone Monitor, digital

The heated metal oxide semiconductor has a range of 0.02 to 10 ppm; digital readout is in 0.01 ppm increments. Use as a permanent monitor indoors when the concentration average is below 0.1 ppm; use outdoors or at concentrations up to 10 ppm for short periods of time. Includes rechargeable batteries, charger, and carrying case.

Order optional calibrator to verify that your ozone monitor is conforming to the original calibration. Calibrator recalibrates detector at 0.1 ppm. It measures 21⁄4''W x 33⁄4''H x 1''D and includes a 9 V battery.