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.
Dissolved Oxygen Sensors Advantages of Different Measurement Methods
- Quick response time
- Short warm-up time
- Long term stable measurement
- Easy maintenance
- Safety and environmentally friendly (no chemical solutions)
- Initial cost-effective
- Can use with Guide pipe fitting
Optical Dissolved Oxygen Sensors DO71/DO72
It is a fluorescent dissolved oxygen sensor that is easy to clean and stable for long term measurement. Sensor replacement is easy on site and reduces maintenance costs. It is possible to measure oxygen in a wide range including low concentration measurement.
Suitable for use in water treatment plants such as sewage treatment plants and wastewater treatment plants under severe measurement conditions.
Can be used in combination with FLXA402 liquid analyzer by digital communication.
Measuring Sensor DO30G
The DO30G sensor for dissolved oxygen is designed for use in water treatment plants such as sewage treatment works, effluent activated sludge process, and potable water treatment. It is also effective in river monitoring, intake protection, fish farming, and other fields where water quality is important.
Sensor Holders for pH/ORP, DO and MLSS Analyzers
Yokogawa provides several types of holders, for which cleaners can be added, allowing customers to build reliable and easy-to-maintain measuring systems by selecting the right holders and cleaners for the conditions of applications.
When used to measure the dissolved oxygen in an aeration tank, sensors tend to quickly become contaminated and need frequent cleaning.
Removal of free oil and grease from a wastewater stream reduces the potential for equipment problems to occur further downstream. There are three forms of oil encountered in wastewater treatment at a refinery.
The detectors used to perform dissolved oxygen (DO) measurement in oxidation ditch type sewage treatment plants tend to become dirty quickly and require frequent cleaning.
In a batch tank, analyzers such as dissolved oxygen (DO) analyzers, oxidation-reduction potential (ORP) meters, and mixed liquor suspended solid (MLSS) analyzers are used. To reduce the maintenance frequency, measures must be taken to prevent dirt accumulation on the sensor. As the liquid level in a tank can vary greatly, great care should be taken when selecting the sensor installation position in a tank.
- WTB10-DO1,-DO2,-DO3,-DO4 Terminal Box (687 KB)
- DO71 and DO72 fitting adapter assembly (676 KB)
- Model DO71 Optical Dissolved Oxygen Sensor (2.0 MB)
- Model DO72 Optical Dissolved Oxygen Sensor (2.3 MB)
- Model PR10 Manual Retractable Fitting (1.7 MB)
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