Thermo Fisher Scientific - Model 49i -Ozone Analyzers

Using UV Photometric technology, the Model 49i measures the amount of ozone in the air from ppb levels up to 200ppm.The Model 49i is a dual cell photometer, the concept adopted by the NIST for the national ozone standard. Dual range and auto range are standard features in this  instrument. Because the instrument has both sample and reference flowing at the same time a response time of 20 seconds can be achieved.