9.1 Measuring Ranges (Sensor)
The tables below show the relationship between measuring ranges and vortex
frequency ranges for a typical gas (air, at 0 °C and 1.013 bar) and a typical liquid
(water, at 20 °C). The column “K-factor” shows a range of typical values for the
K-factor of an instrument of the corresponding size and type (wafer or flange).
Your E+H Sales Office will be pleased to provide information on flowmeters for your
specific application with regard to the process characteristics of the fluid and operat-
ing conditions.
Prowirl 77 W (Wafer)
DN Air (at 0 °C, 1.013 bar) Water (at 20 °C) K-factor
DIN/ANSI [m
3
/h] [m
3
/h] [pulses/dm
3
]
F-range (Hz) F-range (Hz) min./max.
DN 15 / ½" 4 35 330...2600 0.19 7 10.0...520 245...280
DN 25 / 1" 11 160 180...2300 0.41 19 5.7...300 48...55
DN 40 / 1½" 31 375 140...1650 1.1 45 4.6...200 14...17
DN 50 / 2" 50 610 100...1200 1.8 73 3.3...150 6...8
DN 80 / 3" 112 1370 75... 850 4.0 164 2.2...110 1.9...2.4
DN 100 / 4" 191 2330 70... 800 6.9 279 2.0...100 1.1...1.4
DN 150 / 6" 428 5210 38... 450 15.4 625 1.2... 55 0.27...0.32
Prowirl 77 F (Flange)
Prowirl 77 H (High pressure to DN 150 / 6")
DN Air (at 0 °C, 1.013 bar) Water (at 20 °C) K-factor
DIN/ANSI [m
3
/h] [m
3
/h] [pulses/dm
3
]
F-range (Hz) F-range (Hz) min./max.
DN 15 / ½" 3 25 380...2850 0.16 5 14.0...600 390...450
DN 25 / 1" 9 125 200...2700 0.32 15 6.5...340 70...85
DN 40 / 1½" 25 310 150...1750 0.91 37 4.5...220 18...22
DN 50 / 2" 42 510 120...1350 1.5 62 3.7...170 8...11
DN 80 / 3" 95 1150 80... 900 3.4 140 2.5...115 2.5...3.2
DN 100 / 4" 164 2000 60... 700 5.9 240 1.9... 86 1.1...1.4
DN 150 / 6" 373 4540 40... 460 13.4 550 1.2... 57 0.3...0.4
DN 200 / 8" 715 8710 27... 322 25.7 1050 1.0... 39 0.1266...0.1400
DN 250 / 10" 1127 13740 23... 272 40.6 1650 0.8... 33 0.0677...0.0748
DN 300 / 12" 1617 19700 18... 209 58.2 2360 0.6... 25 0.0364...0.0402
min
V
max
V
min
V
max
V
min
V
max
V
min
V
max
V
9 Technical Data Prowirl 77 PROFIBUS-PA
60 Endress+Hauser
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