The OxySense from Pi comes with a number of benefits, the most exciting of which is the auto-verification that happens every time the sensor is cleaned with air. This is made possible by the design of the sensor which means that the water is excluded from the front of the sensor during the cleaning operation which allows the sensor to respond to the oxygen in the compressed air that is cleaning it. The controller monitors the response of the sensor and ensures that it responds appropriately to the oxygen in the cleaning air thereby verifying that the sensor is responding to dissolved oxygen as it should.
- Down to zero maintenance
- No chemicals reagents or moving parts – or reducing maintenance
- Integrated self-cleaning
- Integrated self-verification
- Up to 36 months between cap changes
- No initial calibration required
- Calibration only once per year
- Reproducible DO readings between sensors
- Proven reliability
By far the largest application for ppm dissolved oxygen monitoring is in aeration lanes in activated sludge wastewater treatment plants. The monitoring of DO is essential to control the blowers that pump air into the sludge in the aeration lanes to keep the bacteria that digest the sludge alive. The cost of the electricity to run the blowers can often be up to 50% of the cost of running the plant and therefore keeping just enough oxygen in the water is crucial to making the plant efficient. In order to do this, great reliance is placed upon the online monitoring of dissolved oxygen. This monitoring must be reliable and reproducible. The OxySense from Pi utilizing the In Situ RDO sensor gives the reliability, accuracy and reproducibility that operators need in order to maintain the perfect dissolved oxygen level in the activated sludge and therefore keep the plant as efficient as it is possible for it to be.
The most difficult part of continuously monitoring dissolved oxygen in activated sludge is keeping the sensors clean. A fouled sensor will measure lower dissolved oxygen than is actually present in the aeration lane and will drive the blowers up to put more and more oxygen into the sludge at increased electrical cost. Keeping the sensors clean manually can be a full-time job for an operator. The OxySense from Pi has an inbuilt auto-cleaning capability thereby keeping the sensor clean all of the time.
If you would like to run a trial in your plant or would like to learn more about the OxySense from Pi then why not contact us?
There are two OxySense DO sensors available.
- OxySense S – is a submersible stainless steel sensor designed to be dipped into an aeration lane or other open body of water. The sensor comes with self-cleaning built in and can have self-checking as an option.
- OxySense A – is designed to fit in a flow cell for water to flow through it. It is made of delrin and is perfect for aquaculture applications.
For more information please download the brochure below or contact us to discuss the best options for your application.