EFS900 Battery Powered Electromagnetic Flowmeter



  • Conformed to OIML-R49
  • Up to 5 years of Battery Life
  • Maintenance-Free Operation
  • All data automatically stored in Internal EEPROM

The measuring principle of the electromagnetic flowmeter (Magmeter) is based upon the Faraday’s Law of electromagnetic induction; whereby a voltage is induced by an electrical conductor passing through a magnetic field.
The following equation is applicable to the induced voltage: U = kBVD where

EFS900 Process

In electromagnetic flowmeter, the medium acts as the electrical conductor when flowing through the meter tube, the induced voltage is proportional to the average flow velocity (the faster the flow rate, the higher the voltage). The induced voltage is picked up by a pair of electrodes (mounted in the meter tube) and transmitted to a flow transmitter to produce standardized output signals.

Using the pipe cross-sectional area, the flow volume is calculated by the transmitter.

  • Abstraction and distribution
  • Revenue and bulk metering
  • Irrigation
  • Industrial Wastewater
  • Leak detection systems
  • Any remote application with no access to mains power
  • Municipal water distribution lines
  • Over night applications with very low flow rate
  • Possible to install without sufficient straight pipe runs

Flow Sensor

Flow tube material AISI 304, AISI 316 (optional)
Flanges material Carbon steel (S235JR - 1.0037), AISI 304 optional, AISI 316 optional
Available electrodes Hastelloy C (standard), Hastelloy B, Titanium, Tantalum, Platinum
Internal lining Hard Rubber
Liquid temperature -40°C / + 80°C
Sensor size Full bore up to DN 600
Flanged connections EN1092-1 PN 16, ANSI 150 (Others on request)
Operation pressure 21 bar (Standard)
Protection Degree IP68 permanent submersion at 1,5 m (EN 60529)
Electrical connections Cable glands M20 x 1.5 + terminal box + sealing resin


Transmitter type Battery powered - 2 x D Cell 3,6 V
Battery life Lithium battery pack up to 5 years or more depending on usage.
Accuracy 0,2 % +/- 2 mm/s
Temperature Media 0 ... 70 C° Storage -40 ... +70 C°
Enclosure Policarbonate case with aluminum bottom on compact vertical version.
IP 67 / 68. Remote wall mount braket in carbon steel zinch plated.
Cable entries 4X PG9 Glands I/O - 2X PG20 Glands junction box in remote version
Flow velocity range 0,015 m/s up to 10 m/s
Display and keys 4 Push buttons to access all functions Totalizer informations can be displayed with 5 decimal digits
Displayed informations • Instantaneous flowrate
• Total positive totalizer (T+)
• Total negative totalizer (T-)
• Partial positive totalizer (P+)
• Partial negative totalizer (P-)
• Time & date
• Converter temperature
• Process pressure and temperature (if available)
• Parameters corresponding code and value
Flow Units m, m3, l, ML, ft3, GAL or user's preferred engineering units
Outputs 2 pulse passive outputs (MOS), individual galvanically isolated - clean contact Maximum load +/- 35V DC, 100 mA short circuit protected
Communication Integrated infrared interface
Datalogging 100,000 lines of data with a frequency of log between 1 minute and 120 minutes
Add on modules GSM/GPRS Module
Pressure (1) and temperature (2)
Energy metering ready
Totalizers 4 (2 positive and 2 negative)
Date and time Yes
Data protection Password available, automatic firmware check and recover during the update
Alarms and status Status icon displayed and alarm logged in the datalogger
Self diagnostic Alarms Available
• excitation failure
• empty pipe on the 4th electrode
• empty pipe on the measuring electrodes
• high temperature
• high voltage supply
• pulse overlapped
• wet electronic board
External verification Field verificator available for calibration verification and electronic status
Software for communication and programming Commissioning (equal settings of meters) - Data print for documentation - Data export
(CSV file) - Firmware update - Read instant flowrate - Read and write all non volatile
parameters - Download internal datalogger - View instrument event logger

More Products / Systems