Proline Promag 50D
Hauser
3
Function and system design
Measuring principle
Following
Faraday's law of magnetic induction
, a voltage is induced in a conductor moving through a magnetic
field.
In the electromagnetic measuring principle, the flowing fluid is the moving conductor.
The voltage induced is proportional to the flow velocity and is supplied to the amplifier by means of two
measuring electrodes. The flow volume is calculated by means of the pipe cross-sectional area. The DC
magnetic field is created through a switched direct current of alternating polarity.
a0003191
Ue = B · L · v
Q = A · v
Ue
Induced voltage
B
Magnetic induction (magnetic field)
L
Electrode spacing
v
Flow velocity
Q
Volume flow
A
Pipe cross-section
I
Current strength
Measuring system
The measuring system consists of a transmitter and a sensor.
Two versions are available:
• Compact version: Transmitter and sensor form a mechanical unit.
• Remote version: Sensor is mounted separate from the transmitter.
Transmitter:
• Promag 50
(key operation, two-line, illuminated display)
Sensor:
• Promag D
DN 25, 40, 50, 80
Ue
I
I
B
L
V
