Siemens SITRANS F Series Operating Instructions Manual page 162

Sizing sensor
G.1 Sizing table DN 25 to 1200 (1" to 48")
Guidelines for selection of sensor
Normally the sensor is selected so that V lies within the measuring range 1 to 2 m/s (3 to 7 ft/
sec.).
● Min. measuring range: 0 to 0.25 m/s (0 to 0.8 ft/sec.)
● Max. measuring range: 0 to 10 m/s (0 to 33 ft/sec.)
Flow velocity calculation formula
● Metric measures:
V = 1273.24 x Q / Di
or
V = 353.68 x Q / Di
● Imperial measures:
V = Q x 0.408 / (Pipe I.D.)
or
V = Q x 283.67 / (Pipe I.D.)
162
V: [m/s]; Q: [L/s]; Di: [mm])
2 (
V: [m/s]; Q: [m /h]; Di: [mm])
2 ( 3
V: [ft/s]; Q: [GPM]; Pipe I.D.: [inch])
2 (
V: [ft/s]; Q: [MGD]; Pipe I.D.: [inch])
2 (
SITRANS FM MAG 8000
Operating Instructions, 03/2020, A5E03071515-AH