PROline Promag 10 P
Hauser
Function and system design
Faraday’s law of induction states that a voltage is induced in a conductor moving in a
magnetic field. In electromagnetic measuring, the flowing medium corresponds to
the moving conductor. The induced voltage is proportional to the flow velocity and is
detected by two measuring electrodes and transmitted to the amplifier. Flow volume
is computed on the basis of the pipe’s diameter. The constant magnetic field is
generated by a switched direct current of alternating polarity.
Ue = B · L · v
Q = A · v
Ue = induced voltage
B = magnetic induction (magnetic field)
L = electrode gap
v = flow velocity
Q = volume flow
A = pipe cross-section
I = current strength
The measuring system consists of a transmitter and a sensor.
Two versions are available:
• Compact version: transmitter and sensor form a single mechanical unit.
• Remote version: transmitter and sensor are installed separately.
Transmitter:
• Promag 10 (user interface with push buttons for operation, unilluminated two-line
display)
Sensor:
• Promag P, 1” to 12” (DN 25 to 300)
Input
Flow rate (proportional to induced voltage)
Typically v = 0.033 to 33 ft/s (0.01 to 10 m/s) with the specified measuring accuracy
Over 1000 : 1
Measuring system
Measuring principle
Measured variable
Measuring range
Operable flow range
2
V
I
I
