Important application of turbidity measurement. Many water supply systems depend partly on natural spring water. Frequently a spring will become unusable at certain times (snow break, thunder storms, etc.), which makes it necessary to monitor its turbidity continuously. Because the instruments, often in remote locations, switch automatically between “use” and “discard”, they have to work reliably with virtually no maintenance. The SIGRIST configuration with the stable free-fall flow cell and the automated solid reference (quality assurance) is ideal for this application. In some countries this water source is often called borehole water.
In some areas there is a danger of spring water contamination from leaks in fuel oil tanks. In these cases, oil trace measurement by the fluorescence principle is used. Drinking water treatment; Window contamination