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A two-stage diaphragm pump circulates a sample from the process. A small sample is diverted for measurement by the oxygen analyzer. Particle filters block contamination; a flow sensor initiates an inert gas blowback purge when necessary.
The Oxigraf O2E is our first generation of particle process and dust conveyance monitoring. To keep the analyzer from being contaminated by the process dust, Oxigraf uses a two-stage filter the filters are back-flushed periodically or when sample flow restriction is detected. The model O2E has two (2) pre-filters of 2 µm and 0.1 µm.