I Series 49i PS O3

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Produce ozone concentrations of up to 5000ppb with the Thermo Scientificâ„¢ Model 49i-PS Ozone Primary Standard, a UV photometric primary standard suitable for calibration of ozone analyzers and transfer standards. The Model 49i-PS uses a dual-cell photometer, the concept adopted by NIST as the principle technology for the national ozone standard.