Monitoring the quality of rivers and lakes is becoming more and more important as enviornmental concerns increase. A good dissolved oxygen transmitter used properly is one of the important tools to use in this regard. You may want to look at http://www.ecy.wa.gov/programs/wq/plants/management/joysmanual/4oxygen.html for some useful techniques.
Tubing Suppliers
Please select a tubing supplier from the list below to learn more about that supplier and how to contact them.