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4. TECHNICAL PARAMETERS
4.1. Flow sensor
4.1.1. Selection of correct sensor size
The following table shows minimum and maximum flow rates for various sensor sizes and flow velocities
ranging from 0.33 to 32.81 ft/s (0.1 to 10 m/s). The operational flow-velocity range is best to choose 1.64 to
16.40 ft/s (0.5 to 5 m/s), see the diagram below. For lower flow velocities, the measurement accuracy is
worse while at higher flow velocities the turbulences at contact edges may cause undesirable interference.
Minimum and maximum flow rates for various sensor sizes
ANSI
DIN
DN inches
15
½
20
¾
25
1
32
1 ¼-
40
1
½
50
2
65
2 ½
80
3
100
4
125
5
150
6
200
8
250
10
300
12
Operational flow rates and flow velocities for various sensor sizes
Design, Assembly and Service Manual
Induction flow meter FMG600 series
GPM
Qmin
Qmax
Qmin
0.29
29
0.018
0.528
52.8
0.0333
0.79
79
1.32
132
0.0833
1.98
198
0.125
3.17
317
5.28
528
0.3333
7.93
793
12.33
1233
0.7777
18.93
1893
1.1944
28.62
2862
1.8055
50.63
5063
3.194
79.25
7925
111
11100
l / s
GPH
Qmax
Qmin
1.8
17.2
3.33
31.7
0.05
5
47.6
8.33
79.3
12.5
118.9
0.2
20
190
33.33
317
0.5
50
475.5
77.77
739.6
119.44
1136
180.55
1717
319.4
3038
5
500
4755
7
700
6657
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3
m
/ hour
Qmax
Qmin
Qmax
1712
0.065
3167
0.12
4755
0.18
7925
0.30
11888
0.45
19020
0.72
31700
1.2
120
47552
1.8
180
73962
2.8
280
113594
4.3
430
171711
6.5
650
303764
11.5
1150
475523
18
1800
665732
25.2
2520
6.5
12
18
30
45
72
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