Flow meters EMI-2000
Insertion Electromagnetic Flow Meter
An electromagnetic probe for large pipes, DN150 to DN2000, fitted through a single branch.
- Pipe size range
- DN150 to DN2000
- Velocity range
- 0.1 to 10 m/s
- Accuracy
- ±2% of full scale
- Outputs
- 4–20 mA
Documents
Overview
Why buyers choose it
-
One probe, DN150 to DN2000
Fitted through a 2 in flanged branch, so a large main needs a tapping rather than a cut-in spool.
-
No pressure loss
Nothing crosses the flow, and there is no rotor or bearing to wear.
-
Down to 20 µS/cm
Water and other conductive liquids, corrosive or not; density and viscosity do not shift the reading.
-
±2% of full scale
A single-point velocity reading scaled by a profile factor that depends on the bore.
In detail
An insertion meter measures velocity at one point in the pipe instead of across the whole bore. A stainless steel probe carries the coils and two SS316L electrodes. It enters the pipe through a 2 in ASA 150# flanged branch fitted with a ball valve, and the transmitter turns the local velocity into flow for the bore it has been set up for.
That is its case on large pipes. A full-bore meter at DN1000 means a spool the size of the main and a length of pipe cut out to fit it; this probe covers DN150 to DN2000 with one body and a tapping. It puts nothing across the flow, so there is no pressure loss, and it has no rotor or bearing to wear or to stop in dirty water.
The cost is accuracy. A single-point reading is scaled by a velocity profile factor that depends on the bore, from about 0.85 at DN200 to about 0.87 at DN2000, and the meter is rated at ±2% of full scale. Velocity range is 0.1 to 10 m/s.
The liquid must conduct at 20 µS/cm or more; above that, changes in density, viscosity, pressure, temperature and conductivity do not move the reading, and corrosive liquids are measured as readily as water. Media temperature is 0 to 80 °C and operating pressure up to 10 kg/cm², with 15 kg/cm² as the maximum media pressure. The coils are driven with pulsed DC at 3 Hz to hold the zero steady, and an empty pipe reads as zero flow.
The transmitter is integral as standard, or remote on request, in a die-cast aluminium housing to IP68 with an IP67 terminal box. A 16×2 LCD shows a four-digit flow rate and an eight-digit total in m³/h, LPH, LPM or other units, and damping is adjustable from 5 to 30 s. Outputs are 4–20 mA and RS485, with a reverse-flow output as an option, and it runs on 90–250 V AC at 50 Hz or 24 V DC.
Technical specifications
Metrological
| Measuring principle | Electromagnetic insertion probe, pulsed DC coil excitation at 3 Hz |
|---|---|
| Accuracy | ±2% of full scale |
| Velocity range | 0.1 to 10 m/s |
Hydraulic
| Measured media | Conductive liquids from 20 µS/cm, corrosive or non-corrosive, including water |
|---|---|
| Medium temperature | 0 to 80 °C |
| Maximum working pressure | 10 kg/cm² operating; 15 kg/cm² maximum media pressure |
Materials
| Body material | Probe SS304; construction stainless steel or mild steel |
|---|---|
| Electrode material | SS316L |
| Enclosure material | Die-cast aluminium |
Electrical
| Power supply | 90–250 V AC, 50 Hz, or 24 V DC |
|---|---|
| Outputs | 4–20 mA |
| Display | 16×2 LCD, 4-digit flow rate and 8-digit total, with unit conversion |
Communication
| Communication | RS485 |
|---|
Environmental
| Protection class | Transmitter IP68, terminal box IP67 |
|---|---|
| Ambient conditions | 0 to 50 °C, up to 90% RH, non-condensing |
Dimensions and installation
| Pipe size range | DN150 to DN2000 |
|---|---|
| End connection | 2 in ASA 150# flanged branch |
| Transmitter mounting | Integral as standard, remote on request |
Parts
Parts of an electromagnetic meter
How a meter of this type is built, and what this model is made of.
-
Transmitter with display
Converts the electrode signal into a flow reading and shows it.
Display 16×2 LCD, 4-digit flow rate and 8-digit total, with unit conversion
-
Cable entry
Where the signal and power cables enter the transmitter housing.
-
Field coil
Generates the magnetic field the flow induces a voltage across.
-
Electrodes
Sense the voltage induced by the flowing liquid.
Electrode material SS316L
-
Insulating liner
Isolates the measuring signal from the metal tube wall.
-
Measuring tube
Carries the flow through the magnetic field.
Body material Probe SS304; construction stainless steel or mild steel
-
Earthing rings
Reference the liquid to the pipework's earth potential.
-
Flanges
Bolt the meter to the pipeline.
End connection 2 in ASA 150# flanged branch
Download centre
Everything you need to specify.
Documents for the Insertion Electromagnetic Flow Meter.
-
Download PDF (Opens in a new tab)
Technical datasheet
Specifications and dimensions.
More from Flow meters
View all Flow meters
Flow meters
Battery-Powered Turbine Flow Meter
- Sizes
- DN15 to DN200
- Accuracy
- ±1% of full scale from 20 to 100% of flow; linearity ±1%
