EMERSON
Measurement Instrumentation
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Rosemount™ 499ATrDO Trace Dissolved Oxygen Sensor

The Rosemount 499ATrDO Trace Dissolved Oxygen Sensor is a membrane-covered amperometric sensor for continuous measurement of ppb-level DO in water, ideal for steam condensate and boiler feedwater

The 499ATrDO delivers highly accurate ppb level oxygen monitoring with fast stabilization for minimal downtime. Its low maintenance, tool free design and pressure equalizing features ensure long term reliability, while automatic temperature compensation maintains accuracy under changing conditions. Flexible cabling and VP6 connector options make integration easy, and the sensor is ideal for boiler feedwater, steam condensate, high purity water, and other processes requiring trace level oxygen detection.

Key Features

  • High accuracy of ±1.0 ppb when measuring concentrations below 20 ppb
  • Rapid stabilization following calibration or maintenance
  • Easily replaceable membrane with no special tools required
  • Automatic compensation for changes in membrane permeability
  • Variopol (VP) connector options allows the sensor to be replaced without running new cable