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mini CORI-FLOW™ Ex d
Coriolis Mass Flow Meters in flameproof enclosure

IECEx and ATEX approved design

The compact mass flow meters of mini CORI-FLOW™ series M12-M14 can be built in an explosion proof housing for use in IECEx and ATEX Zone 1 hazardous areas, ATEX approval II 2 G Ex d e IIB T6 Gb. All electrical instrument connections are available on screw terminals in an electrical housing connected to the Ex d box. The mini CORI-FLOW™Ex d series are designed for small flow rates, from 100 mg/h up to 30 kg/h, both for liquids and gases. The instruments can be used in systems with pipeline pressures up to 137 bar (1987 psi). The Coriolis flow meter can be equipped with a heater to prevent condensation or solidification inside the instrument. Optionally an additional (external) control unit can be provided to monitor and control the heating temperature.

Superior Coriolis flow sensor

Instruments of the mini CORI-FLOW™ Ex d series contain a uniquely shaped, single loop sensor tube, forming part of an oscillating system. When a fluid flows through the tube, Coriolis forces cause a variable phase shift, which is detected by sensors and fed into the integrally mounted pc-board. The resulting output signal is strictly proportional to the real mass flow rate. Coriolis mass flow measurement is fast, accurate and inherently bi-directional. The mini CORI-FLOW™ Ex d features density and temperature of the fluid as secondary outputs.

Mass Flow Control

mini CORI-FLOW™ Ex d mass flow meters offer integrated PID control for direct control of valves or pumps, thus constituting compact Coriolis mass flow control loops. Valves or pumps to be used in Zone 1 can also be provided with the meter, but have to be installed outside the Ex d box, to be electrically connected to the screw terminal of the unit.

Fields of application

mini CORI-FLOW™ instruments can be applied in process control systems as for example in chemical, petrochemical and pharmaceutical plants, such as dosing systems for gas odorization and additive control for scale/corrosion inhibitor for oil pumps.


  • direct mass flow measurement, independent of fluid properties
  • high accuracy, excellent repeatability
  • multi-range: easy on site re-ranging via digital interface
    (effective turndown 2000:1, typical XM13)
  • IECEx and ATEX approval II 2 G Ex d e IIB T6 Gb 
  • metal-sealed construction
  • bi-directional measurement
  • additional density and temperature outputs
  • standard analog 0…5(10) Vdc and 0(4)…20 mA and digital RS232 communication
  • alarm and (batch) counter functions


Model Lowest range Nominal range Highest range*
XM12 0.1…5 g/h 1…100 g/h 2…200 g/h
XM13 1…50 g/h 10…1000 g/h 20…2000 g/h
XM14 0.03…1 kg/h 0.1…10 kg/h 0.3…30 kg/h

* Maximum capacities depend on the available pressure difference across the mass flow meter, especially when used on gases.


For more information see our brochure "mini CORI-FLOW Ex d Coriolis Mass Flow Meters for small flow rates in flameproof enclosure"

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Ex-proof Coriolis flow meter for low flow ratesCoriolis Mass Flow Meter in flameproof enclosureEX-Proof Coriolis Mass Flow Meter
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