Dissolved Oxygen Analyzers
Dissolved Oxygen Analyzers
Dissolved Oxygen (DO) meters, analyzers and transmitters are used for continuous process measurement and monitoring of milligrams per liter (mg/l),parts per million (ppm), parts per billion (ppb), or % saturation.
Dissolved oxygen (DO) is a liquid process measurement for determining the amount of oxygen dissolved or carried in the process liquid. There are three common technologies for dissolved oxygen measurements: polographic, galvanic and optical. The standard units of measure are milligrams per liter (mg/l), parts per million (ppm), parts per billion (ppb), or % saturation.
Features of dissolved oxygen measurement
This process analyzer achieves high functionality, high reliability, and reduced maintenance. Suitable for on-site installation and can be used under severe environmental conditions.
Not only galvanic sensors but also polarographic detectors can be used. There are mg/L, ppm and % saturation units as the units for displaying dissolved oxygen concentration. In addition, for the best measurement accuracy, corrections are made for variations in atmospheric pressure, salinity in water, and temperature that differ depending on the altitude, etc.
Dissolved oxygen measurement specification
| Input Specification | The FLXA202 accepts output from membrane covered Dissolved Oxygen sensors. These sensors can be Galvanic type, where the sensor generates its own driving voltage or Polarographic type, where the sensor uses external driving voltage from the converter. The input range is 0 to 50 µA for Galvanic sensors and 0 to 1 µA for Polarographic sensors. For temperature compensation, the FLXA202 accepts Pt1000 (DO30 sensor) and NTC22k elements (OXYFERM and OXYGOLD sensors). | |
|---|---|---|
| Measurement Range | DO Sensors | Dissolved Oxygen: 0 to 50 mg/l (ppm) Temperature: -20 to 150 ºC |
| DO30G | Measurement range: 0 to 20 mg/l (ppm) Temperature: 0 to 40 ºC | |
| Performance (Accuracy) (Performance in ppm mode) | Linearity | ±0.05 ppm or ±0.8% F.S., whichever is greater |
| Repeatability | ±0.05 ppm or ±0.8% F.S., whichever is greater | |
| Accuracy | ±0.05 ppm or ±0.8% F.S., whichever is greater | |
| Temperature | Linearity: ±0.3 ºC Repeatability: ±0.1 ºC Accuracy: ±0.3 ºC | |