Gas flow measuring instruments
FLOWSIC100 Flare

Reliable gas flow measurement in flare gas applications

Your Benefits

  • Reliable process control due to exact measurement near the zero point
  • High measurement availability even in the case of emergency shutdowns with gas velocities of up to 120 m/s
  • A solution for the measurement of flare gas and steam injection
  • Cost savings due to detached installation of the control unit possible in the safe area
  • System solution for the control of three different measuring points with a common control unit
  • Cost savings due to one-sided installation when using FLOWSIC100 EX-PR probe version
  • Optimal device performance due to continual function monitoring and extended diagnostic functions in the field

The exact device specifications and performance data of the product may deviate from the information provided here, and depend on the application in which the product is being used and the relevant customer specifications.
In accordance with Article 2 (4), this product does not fall within the scope of RoHS directive 2011/65/EU and is also not designed for use in products which fall within the scope of this directive. You can find additional information in the product information.


Reliable gas flow measurement in flare gas applications

The FLOWSIC100 Flare product family is designed for flare gas and steam flow measurements. The product family is characterized by a unique flow-optimized sensor design. This innovative design minimizes flow-generated noise and signal drift when gas velocities are particularly high. Modern signal processing and high-efficiency transducers enable high time resolution for signals and thus deliver accurate measurements, even at extremely low gas flow rates.

The standard system configuration includes two sender/receiver units or one measuring probe and the MCUP control unit. The MCUP unit is used to input and output signals; to calculate reference values (normalization), molecular weight and mass flow; to record gas volumes; and to provide user-friendly control via the LCD display.

At a glance
  • High-resolution measurement and short response time
  • Innovative sensor design for very high gas velocities and gas temperatures up to 280 °C
  • Optimal signal transmission even under atmospheric pressure
  • Detached installation of the control unit up to 1,000 m away
  • Single and multi-path configuration, opt. Probe version
  • Zero point test in the field according to factory standard
  • Control cycle for automatic self-diagnosis / signal optimization


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Technical overview

  • Technical data overview

    Technical data overview

    Measured valuesGas velocity, gas temperature, gas volume and mass, Mass flow rate, molecular weight, volumetric flow a. c., volumetric flow s. c., sound velocity
    Measurement principleUltrasonic transit time difference measurement
    Hazardous area




    Class I Division 1

    Class I Division 2




    Measuring rangesMeasuring ranges depend on nominal pipe size and gas composition
    Gas temperature

    Standard: –70 °C ... +180 °C

    High-temperature Zone 1: –70 °C ... +280 °C

    High-temperature Zone 2: –70 °C ... +260 °C

    Low temperature: –196 °C ... +100 °C
    Not for FLOWSIC100 EX/EX-RE Zone 1 and Class I, Division 1

    Operating pressure

    –0.5 bar (g) ... 16 bar (g)

    FLOWSIC100 EX-S 90°: –0.5 bar (g) ... 19 bar (g)

    Nominal pipe size4 ″ ... 72 ″
    Depending on gas composition and device version
    Enclosure rating

    FLSE100 sender/receiver unit (ATEX zone 1): IP65, IP67

    FLSE100 sender/receiver unit (ATEX zone 2): IP65

    FLSE100 sender/receiver unit (CSA class I): depending on device version

    MCUP control unit: IP66

    MCUP control unit (19-inch version): IP20

    MCUP control unit (Ex zone 1): IP66

    MCUP control unit (Ex zone 2/Division 2): housing type 4, IP66

    FunctionConnection to SOPAS ET software
    Serial✔ , ✔
    Type of fieldbus integrationRS-232
    FunctionConnection to SOPAS ET software
    Internal system bus
    Type of fieldbus integrationVia optional interface module
    Modbus✔ , ✔ , ✔
    Type of fieldbus integrationASCII RS-485 (via optional interface module)
    RTU RS-485 (via optional interface module)
    TCP (via optional interface module)
    Type of fieldbus integrationVia optional interface module
    Type of fieldbus integrationVia optional interface module
    Foundation Fieldbus
    Type of fieldbus integrationVia optional interface module
All technical data can be found accompanying the individual product