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FLOWSIC300 Non-custody transfer measurement and process monitoring



Non-custody transfer measurement and process monitoring

The FLOWSIC300 ultrasonic flowmeter features a unique combination of high quality components, large measuring range, simple installation, and low installation costs. It can be used anywhere where custody approval is not required: For internal measurements in the natural gas grid and with process measurements in the petrochemical industry. The FLOWSIC300 incorporates proven technology and components of the rugged custody transfer quality gas flow meters from SICK for custody transfer and combines these to produce a cost-effective flowmeter for a variety of applications. The measuring transducer at a distance of up to 15 m away from the measuring point facilitates a high level of flexibility in installation and includes continuous self-diagnostics. The ultrasonic measurement principle does not generate any pressure loss, has no moving parts, is resistant to pulsations and pressure regulator noise and is ideal for reliable and practically drift-free operation.

At a glance
  • Quality components

  • Modular flexible installation

  • Non-contact ultrasonic technology without pressure loss

  • Measuring range span greater than 100 : 1

  • Sensors can be replaced under pressure

  • Low sensitivity to pulsation and pressure regulator noise

  • Remote electronics (max. 15 m)

  • Bi-directional measurement with automated diagnostics



Fields of applications

  • Gas flow measurement in non custody transfer applications

  • Control measurements in the field of natural gas transfer and storage

  • Internal measurements for balancing purposes

  • Associated gas measurement

  • Efficiency monitoring in gas compressor stations

  • Flare gas and process measurements for design pressure of over 16 bar

  • Pipeline leakage detection

Technical data overview

Measured valuesVolumetric flow a. c., volume a. c., gas velocity, sound velocity
Measurement principleUltrasonic transit time difference measurement
Number of measuring paths1, 2
Hazardous area



Measuring rangesDepending on the nominal size of the pipe
Measuring spanMax. 1:130
Gas temperature–40 °C ... +180 °C
Operating pressure10 bar (g) ... 100 bar (g)
Nominal pipe size4 ″ ... 56 ″
Enclosure rating

Sender/receiver units: IP68

SPU control unit: IP65 / IP67

Modbus✔ , ✔
Type of fieldbus integrationASCII RS-485

RTU RS-485