ADS Environmental Services Portable FlowShark Pulse QR 775006 A2 - Manual (Page 44)

Installation 3-7
1 Waves forming on water surface behind sensor installed
at bottom of pipe cause corresponding air-ultrasonic
depth sensor to produce errors.
2 Good (consider installing 0.39 inches (10 mm) lower in
low flow depth conditions)
3 Distance too far from edge of sensor bottom to maximum
water level
4 Good. Best possible sensor position at maximum water
level
Installation in manholes with depth levels ≤ 6 inches (150 mm)