Family Owned & Operated Since 1971• Bakersfield, CA
2 product families(2 total products)
Membrane-covered amperometric dissolved oxygen sensor — continuously measures DO between 0-20 ppm. The lower-cost alternative to the optical RDO when daily calibration burden is acceptable and maintenance staff is regularly on-site. Best for municipal and industrial wastewater aeration basins, where the 499ADO has decades of installed-base reliability. Membrane and electrolyte are field-replaceable; rebuild kits available for multi-year sensor life.
Optical (luminescent-quenching) dissolved oxygen sensor — measures DO in wastewater aeration basins, ponds, and surface water without the membrane fouling, electrolyte depletion, or zero-drift issues of older membrane DO sensors. No daily zero calibration. Typical sensor life 1-2 years between cap replacements (vs 3-6 months for membrane). Best for municipal wastewater aeration optimization, fish farming, and any DO measurement where maintenance burden has historically been a problem. The Rosemount choice when 499ADO membrane sensor's lower cost is outweighed by maintenance time.