The DOH-SD1 series dissolved-oxygen meters include real-time secure digital card data loggers. The product features a liquid-crystal display with green-light backlighting, altitude and salt adjustments, RS-232/USB interface, and automatic temperature compensation. Omega Engineering Inc. (Stamford, Conn.).rnThe Sentino microbiology pump uses the membrane filter technique for microbial analysis of aqueous samples. Using a small peristaltic-action pump that draws aqueous samples through a membrane filter, the system channels filtrate directly to drain or waste collection.
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