• Amplifier ModMAG® M3000 / M4000

Amplifier ModMAG® M3000 / M4000

for all sensors

  • DN6 - DN300/600
  • Accuracy ±0,20 % of actual flow
  • Ex-proof
  • ATEX / FM / CSA
  • Protection class IP 67
  • Flow range 0,03 – 12 m/s
Water, Chemical/Petrochemical media, Pharmaceutical media
max. flow:
from 0.05 up to 203500 l/min
from -20 up to 100 °C
max. pressure:
from 0 up to 100 bar
Water & waste water industry, Chemical industry, Oil industry, Pharmaceutical industry


General information

The new amplifier with modular design allows flow measurements in ex-zones 1 and 2, in either the mounted or remote version. The amplifier housing, made of powder-coated aluminium, is available in protection class IP 67 and with a separate connection space.

Programming can be done either with closed housing thanks to a magnetic pen or with open housing via three buttons. The four-line display shows all necessary data like actual flow, totalizer and status messages. The programmable excitation frequency even enables the amplifier to be adjusted for difficult metering applications. The new developed process for amplifier compensation enables a high accuracy, especially in the lower flow range.


Technical data

Size DN 6 – DN 600 (M3000), DN 6 – DN 300 (M4000)
Accuracy ±0,2 % of actual flow, ±1 mm/s of actual flow
Repeatability 0,1 %
Flow range 0,03 – 12 m/s
Conductivity Min. 5 μS/cm (min. 20 μS/cm for demineralized water)
Power supply 85 – 265 VAC (50/60 Hz) < 20 VA, optional 24 VDC
Display LCD 4 lines / 16 characters
Digital outputs 2 x open collector, 2 x relays (M3000)
Digital inputs Yes
Analog output 0/4 – 20 mA, 0 – 10 mA
Interface -
Empty pipe detection Separate electrode
Datalogger -
Housing Aluminium, IP 67 (NEMA 4x)
Remote version Max. 30 m
Ambient temperature -20 °C up to +50 °C
Approvals M3000 ATEX Zone 2, FM/CSA, Class I, Div. 2,
  M4000 ATEX Zone 1, FM/CSA, Class I, Div. 1


Measuring principle

Electromagnetic flow meters


The operating principle of the electromagnetic flow meter is based on Faraday's law of magnetic induction: The voltage induced across any conductor, as it moves at right angles through a magnetic field, is proportional to the velocity of that conductor. The voltage induced within the fluid is measured by two diametrically opposed internally mounted electrodes. The induced signal voltage is proportional to the product of the magnetic flux density, the distance between the electrodes and the average flow velocity of the fluid.


Electromagnetic flow meter measuring transducer in Ex area






  • Low investment costs
  • Cost saving as against classical data recording
  • Wireless measuring sites