Electro Magnetic Flowmeters


ADDMAS a versatile Electromagnetic flow meter is ideal for conductive liquids such as Raw Water, Chilled water, effluents, Potable water etc. Using time proven electromagnetic flow metering principle, the meter achieves a flow meter for pipes from 15mm to 600mm. Since there are no moving parts, the flow meter gives years of maintenance free service.

ADDMAS flow-head can be supplied in Teflon lining or Hard Rubber lining is available with all the features required in a field mounted water metering equipments. These include - weather proof enclosure, communication options, RTC with data logging with printer option and 4 to 20 mA isolated Flow signal transmission option for flow pattern recording. The converter is available as field mounted-IP65 protection category. GSM modem interface can also be supplied as an optional add-on feature.


The operating principle of Magnetic flow meters is based upon Faraday's Law of electromagnetic induction, “ It state that a voltage will be induced in a conductor moving through a magnetic field”.

Faraday's Law :

  • E = kBDV where
  • E = Induced Voltage
  • B = Strength of the magnetic field
  • D = Conductor Width
  • V = Velocity of the conductor

The magnitude of the induced voltage E is directly proportional to the velocity of the conductor width D, and the strength of the magnetic field B. Liquid acts as a conductor as it flows through pipes.


This Flowmeters find varied applications where the flowing medium is difficult to handle. Major advantage of these flowmeters are : zero pressure drop, No moving part and highest accuracy level at most affordable cost. Some of the major application can be described below :

  • Effluent Treatment plant
  • Sewage Treatment plant.
  • Water supply Schemes
  • Pulp and Papers
  • Sugar industries and distilleries
  • Steel and Aluminums
  • Chemical / Pharmaceuticals
  • Food and Drugs


  • Tolerates High percentage of suspended solids Sludge, slurries, minerals, paper, sewage – flows with high level of solids which can not be measured other type of meters.
  • Obstruction less measurements
  • Nothing projects into the flow stream, no head loss, no parts to maintain.
  • Pulp and Papers
  • Sugar industries and distilleries
  • Suitable for corrosive liquid
  • Acids, caustic and corrosive additives are isolated from the meter pipe by inert linings and compatible electrodes.
  • Suitable for all types of electrically conductive liquids
  • Liquid where conductivity is of sufficient level to induce measurable


Full-Bore EMFM from ½” to 24” sizes

  • Medium Conductivity : >5 uS/cm
  • Flow Tube Part : SS 316 / SS 304 (Non Magnetic)
  • Meter Sizes : 1/2'”to 24” Pipe sizes. For Higher size consult Factory.
  • Electrodes : SS 316L or optionally Hastalloy ‘C’
  • Process Connection : S series: SS 304 M.S. #150 Flange • E series: Epoxy painted M.S. #150 Flange
  • Lining : S series Lining: PTFE • E series: Hard Rubber / EPDM / Neoprine
  • Sensor Housing : Epoxy painted M.S OR SS 304 optional.
  • Flow Velocity : 0.1 to 10 m/s in two ranges
  • Pressure Rating : Standard Flanges - ASA150 options on request 15 bar Standard, higher on request
  • Operating Temperature Medium : S series: 0 to 150 Deg.C for PTFE lining • E Series: 0 to 70 DegC for Hard Rubber lining
  • Operating Temperature Ambient : 0 to 55 Deg. C

  • Power Supply : 24Vdc or 230Vac or Battery Operated
  • Power Consumption : 12VA max
  • Key Board : 6 Key Membrane Key Board
  • Electrodes : SS 316L or optionally Hastalloy ‘C’
  • Programmable parameters : Volume Units : ltrs, M3, ML, CF. BG; Time Units: sec, min, hrs- 4 to 20 mA range, % Low flow cut of, Pipe Dia, Discharge range, Comm. Parameters Calibration Constant, Filter Constant
  • Data Logger (Optional) : RTC with 24 column Printer, Battery Charger +SMF Batteries and
  • Data Transmission(Optional : RS 485 MODBUS RTU or ASCII Protocol or RS232C, HART, with 4 to 20 mA option as add-on module –available
  • Data Communication (Optional) : An SMS based or GPRS based communication module with software is available as optional extra. The Modem connects through the RS232C port .The flow meter can be equipped with GSM Modem. Thus following configuration can be given:
  • Respond with data to a message (SMS ) from any user. ( Query response mode)
  • Periodic GPRS based Data transmission to a fixed IP address / user’s website.
  • Respond by an SMS to Cell number stored, in case of alarm condition.
  • Flow parameter : Programmable - Volume Units : ltrs, M3, ML, CF, BG - Time Units : sec, min, hrs
  • Configurable Parameters : F.S. for 4 to 20 mA range, %Low flow cut off, Communication Parameters Calibration Constant Damping (Filter)
  • Calibration : Factory Calibrated on certified flow rig
  • Ingress protection : IP 65 / IP 67
  • Electronics Enclosure : Powder coated Die cast Aluminum
  • Flame proof Version : Please contact factory




Pipe – Size(NB) At velocity 0.5 m/sec in LPM At velocity 5 m/sec in LPM
15(1/2”) ~5 ~50
25 (1”) ~15 ~150
40 (1 ½ “) ~37 ~370
50 (2”) ~60 ~600
65 (21/2”) ~ 100 ~1000
80 (3”) ~150 ~1500
100(4”) ~235 ~2350
150 (6”) ~530 ~5300
  At velocity 0.5 m/sec in m3/hr At velocity 5 m/sec in m3/hr
200(8”) ~50 ~500
250 (10”) ~90 ~900
300 (12”) ~125 ~1250
350 (14”) ~180 ~1800
400 (16”) ~225 ~2250

Our Valued Customers

Product Range

ADDMAS offer highly efficient & cost effective solution in area of:

Quality Policy

Every instruments we manufacture is calibrated against highly accurate instruments and undergoes series of test such as Leak Test, Over Load Test and Accuracy Test.All our products are check on the Quality, Reliability And Durability.

Contact Details

A-33, Meldi Estate, Nr. Railway Crossing, Gota, Ahmedabad-382 481, Gujarat, India.
Telefax: +91 2717 242330
Cell: +91 98790 07526
Email: sales@addmas.in,