EasyTREK Compact Ultrasonic Level Transmitters
19
P40= 13
Khafagi Venturi flume
Q[m
3
/s]= P42*1.744*h
1.5
+ 0.091*h
2.5
15cm
P46
Sensor
h
P4
2
Sensor
P40= 14
Bottom step weir
0.0005 < Q[m
3
/s] < 1
0.3 < P42[m] < 15
0.1 < h[m] < 10
Q[m
3
/s]= 5.073*P42*h
1.5
Accuracy:
±
10%
P46
P42
h
P40= 15
Suppressed rectangular or BAZIN weir
0.001 < Q[m
3
/s] < 5
0.15 < P41[m] < 0.8
0.15 < P42[m] < 3
0.015 < h[m] < 0.8
Q[m
3
/s]= 1.7599*[1+(0.1534/P41)]*P42*(h+0.001)
1.5
Accuracy:
±
1%
P04
P46
h
P42
P41
P40= 16
Trapezoidal weir
0.0032 < Q[m
3
/s] < 82
20 < P41[°] < 100
0.5 < P42[m] < 15
0.1 < h[m] < 2
Q[m
3
/s]= 1.772*P42*h
1.5
+1.320*tg(P41/2)*h
2.47
Accuracy:
±
5%
P04
P46
h
P42
P41
