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FLOWSIC100 Flare

FLOWSIC100 Flare Reliable gas flow measurement in flare gas applications



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


Fields of applications

  • Emissions control for accounting of CO2 emissions

  • Detection of flare gas leaks

  • Measurement of steam flow

  • Monitoring of steam injection when burning flare gas

  • Monitoring of gas losses

  • Exact mass balance and process optimization

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