Hach 911 User Manual page 86

Channel Installation Options
Figure 49 Installation for Combined Sewer Overflow (CSO) Applications
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When a Combined Sewer Overflow (CSO) is conducive to accurate flow measurement,
the 940 Flow Meter can measure depth and velocity in the primary channel and measure
discharge in the overflow channel. See
some CSO applications may be too turbulent for accurate measurement.
Figure 49. In some instances, the overflow in