Category : Instrumentations for fluid management, control and transfer (gas and liquids) > Flow control

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Electromagnetic flowmeters and switches
for measuring and monitoring electrically conductive liquids, pastes and slurries

Versions
DWM 1000 flow switch, 2-wire system
DWM 2000 flowmeter, 4 ... 20 mA current output

Special features
Process temperature: –25 … 150°C / –13 … 302°F
Operating pressure: 25 bar / 360 psig
Rugged design
No moving parts, maintenance-free
Wetted parts of stainless steel or ceramics
Electronic unit replaceable at flowing conditions
For pipelines > DN 50 / > 2’’
DWM 1000 and DWM 2000



Electromagnetic flowmeters and switches
for measuring and monitoring electrically conductive liquids, pastes and slurries

Versions
DWM 1000 flow switch, 2-wire system
DWM 2000 flowmeter, 4 ... 20 mA current output

Special features
Process temperature: –25 … 150°C / –13 … 302°F
Operating pressure: 25 bar / 360 psig
Rugged design
No moving parts, maintenance-free
Wetted parts of stainless steel or ceramics
Electronic unit replaceable at flowing conditions
For pipelines > DN 50 / > 2’’


DWM 2000 FT
The DWM 2000 FT flowmeter measures the flowrates of electrically conductive liquids, pastes and slurries.

Version
DWM 2000 FT flowmeter, 4-20 mA current output

Special features
Designed for Tuchenhagen VARIENT® housings
Wetted parts made of stainless steel (surface roughness ≤ 0.8 µm), ceramics and FDA-approved EPDM, crevice-free
Process temperature up to 135°C or 275°F
With CIP/SIP capability
Easy, quick and low-cost installation
One device for all nominal pipe sizes
Electromagnetic measuring principle, no moving parts
Electronic unit replaceable under service conditions


Measuring principle
If an electrical conductor is caused to move in a magnetic field, such movement induces a voltage U in the conductor.

In this case, the conductor is the electrically conductive liquid. Magnetic field B is at right angles to the direction of flow. The induced voltage U is directly proportional to the local flow velocity v.

U = k x B x v xD
k Instrument constant
B Strength of magnetic field v Local flow velocity
D Electrode spacing

Voltage U is tapped off from the electrodes, neutral and ground electrode (socket).

DWM 1000 flow switch Voltage U converted into a switching signal with adjustable switching point.

DWM 2000 flowmeter Voltage U converted into a flow-proportional output signal, load-independent current
4-20 mA.

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List of all articles in this sub-category Flow control

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