15
4 Mounting
VEGAPULS C 21 • SDI-12
58342-EN-200121
3 ... 4 h
max
90°
2
3
1
h
ma
x
≥ 2 x
h
ma
x
90°
4
2
3
≥ 250 mm
(9.84
")
≥ 250 mm
(9.84
")
Fig. 13: Flow measurement with rectangular flume: h
max.
= max. filling of the
rectangular flume
1 Overflow orifice (side view)
2 Headwater
3 Tailwater
4 Overfall orifice (view from tailwater)
2
3 ... 4 x h
max
90°
h
max
B
1
≥ 250 mm
(9.84
")
Fig. 14: Flow measurement with Khafagi-Venturi flume: h
max.
= max. filling of the
flume; B = tightest constriction in the flume
1 Position sensor
2 Venturi flume
Rectangular overfall
Khafagi-Venturi flume
