Endress+Hauser Proline Promag W 800 - Function and System Design; Measuring Principle; Measuring System

Proline Promag W 800
4 Endress+Hauser
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 medium is the moving conductor.
The voltage induced is proportional to the flow velocity and is supplied to the amplifier via two measuring
electrodes. The flow volume is calculated via the pipe cross-sectional area. The DC magnetic field is created
through a switched direct current of alternating polarity.
A0017035
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 device consists of a transmitter and a sensor.
Two device versions are available:
• Compact version – the transmitter and sensor form a mechanical unit.
• Remote version – the transmitter and sensor are mounted separately from one another.
Transmitter
Sensor
I
L
B
I
U
e
v
Promag 800
A0017117
Device versions and materials:
• Compact housing: polycarbonate plastic
• Wall-mount housing: polycarbonate plastic
Configuration
• Local operation, key-based operation, eight-line
• Config5800 software operating tool
Separate GSM/GPRS antenna optionally available.
Promag W (DN 300)
A0017040
Nominal diameters: DN 25 to 300 (1 to 12")
Materials:
• Sensor: aluminum coated AlSi10Mg,
optional: fully welded with protective varnish
• Measuring tube: stainless steel 1.4301/304, 1.4306/304L
• Liner: polyurethane, hard rubber
• Electrodes: 1.4435, Alloy C-22
• Connection housing, remote version: aluminum coated AlSi10Mg,
optional: polycarbonate plastic (IP68)