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  
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.