Gas flow meters

On request
Please note: 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.
Our regional sales organization will help you to select the optimum device configuration.
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  • The latest technology for the ultimate in measurement accuracy: The FLOWSIC500 ultrasonic compact gas meter from SICK enables extremely accurate natural gas distribution measurement. Thanks to its lack of mechanical moving parts, the FLOWSIC500 is rugged, reliable, and maintenance-free – allowing for a significant reduction in operating costs. It is overload-proof, accurate and is monitored by an intelligent diagnostics system. Recalibration is extremely straightforward, as it is simply a matter of exchanging the cartridge. The FLOWSIC500 can easily be integrated into existing measuring stations. It operates either in a self-sufficient energy configuration or in failsafe network operation with battery back-up. It complies with all pertinent standards and directives. When used in transfer stations and measuring stations, the FLOWSIC500 provides the security of a continuous and blockage-free gas supply.

    At a glance
    • Cutting-edge technology: ultrasound
    • Diagnostics and permanent operational check
    • Rugged and reliable due to lack of moving parts
    • Exchangeable cartridge
    • Straight inlet/outlet zone not required
    • Overload-proof
    • Optional integrated flow conversion / date registration
    • Battery or intrinsically safe power supply
    Your benefits
    • Ultimate measurement certainty and safety of continuous gas supply
    • Reduction of installation costs due to integrated flow conversion
    • Simple installation, compatible with conventional technologies (turbine and rotary displacement meters)
    • Minimal operating costs due to being nearly maintenance-free
    • Simplified recalibration due to straightforward cartridge exchange
    • Reliable under dynamic load changes
    • Self-sufficient operation
    • System
      Measured valuesVolume a. c., volumetric flow a. c., gas velocity, volume s. c. (*), volume flow under s.c. (*)
      (*) additional function included with integrated volume correction
      Measurement principleUltrasonic transit time difference measurement
      Measuring mediumNatural gas (dry, odorized)
      Measuring ranges
      Volumetric flow a. c., DN 501 ... 160 m³/h
      Volumetric flow a. c., DN 802.5 ... 400 m³/h
      Volumetric flow a. c., DN 1004 ... 650 m³/h
      Volumetric flow a. c., DN 1504 ... 1,000 m³/h
      Reproducibility≤ 0.1 %
      AccuracyAccuracy class 1; typical error limits
      Qmin up to 0.1 Qmax≤ ± 1 %
      0.1 Qmax up to Qmax≤ ± 0.5 %
      Accuracy class 1; maximum allowed error limits
      Qmin up to 0.1 Qmax≤ ± 2 %
      0.1 Qmax up to Qmax≤ ± 1 %
      After high pressure flow calibration: ±0.2 % at test pressure; otherwise ±0.5 %
      Diagnostics functionsPermanent monitoring of measured values
      Gas temperature
      –25 °C ... +60 °C
      Optional–40 °C ... +70 °C
      Operating pressure

      PN16 (EN 1092-1): 0 bar (g) ... 16 bar (g)

      Class 150 (ASME B16.5): 0 bar (g) ... 20 bar (g)

      Ambient temperature
      –25 °C ... +60 °C
      Optional–40 °C ... +70 °C
      Storage temperature–40 °C ... +80 °C

      MID: 2014/32/EU

      OIML R 137-1&2:2012

      EN 12405: 2010 (for integrated flow conversion)

      IECExEx ia [ia] IIC T4 Gb, Ex op is IIC T4 Gb
      ATEXII 2G Ex ia [ia] IIC T4 Gb, II 2G Ex op is IIC T4 Gb
      NEC/CEC (US/CA)CSA: I.S. for Class 1 Division 1 Groups C and D T4; Ex/AEx ia IIB T4 Ga
      Enclosure rating
      Digital outputs

      LF pulses + malfunction, electrically isolated (fmax = 100 Hz)

      HF pulses + malfunction, electrically isolated (fmax = 2 kHz)

      Encoder + LF pulses, electrically isolated (fmax = 100 Hz)

      Encoder + HF pulses, not electrically isolated (fmax = 2 kHz)

      2x pulses, HF and LF, electrically isolated (fmax = 2 kHz / 100 Hz)

      Type of fieldbus integrationRTU RS-485 (externally powered, alternative to digital outputs)
      Optical interface
      RemarkAccording to EN 62056-21, section 4.3
      Dimensions (W x H x D)See dimensional drawings
      Material in contact with mediaAluminium AC-42100-S-T6
      MountingHorizontal or vertical installation with 0 D straight inlet/outlet piping
      Electrical connection
      VoltageIntrinsically safe supply: 4.5 ... 16 V DC
      Inclusive 3-months back-up battery
      OptionsSelf-sufficient meter configuration (more than 5 years battery runtime)
    • Volume correction

      Accuracy class 0.5

      Maximum allowed error limits of correction factor C

      ≤ ± 0.5 %
      At reference conditions
      Correction methodPTZ or TZ


      AGA 8 Gross method 1

      AGA 8 Gross method 2

      AGA NX-19

      AGA NX-19 mod.


      Fixed value

      Data archives

      Measurement period archive (6,000 entries)

      Daily archive (600 entries)

      Monthly archive (25 entries)


      Event log book (1,000 entries)

      Parameter log book (250 entries)

      Metrology log book (100 entries)

    • Pressure sensor
      Measuring ranges
      Absolute pressure0.8 ... 5.2 bar (a) / 2 ... 10 bar (a) / 4 ... 20 bar (a)
      Relative pressure0 ... 4 bar (g) / 0 ... 10 bar (g) / 0 ... 20 bar (g)
    • Temperature sensor
      DescriptionPlatinum resistance sensor PT100, in stainless steel protective tube
      Measuring ranges
      Temperature–25 ... +60 °C / –40 ... +70 °C
      Ambient temperature
      –40 °C ... +85 °C

    Technical drawings

    FLOWSIC500, nominal size DN100
    FLOWSIC500, nominal size DN150
    FLOWSIC500, nominal size DN50
    FLOWSIC500, nominal size DN80
    pressure sensor
    temperature sensor
    pressure loss (typical)
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