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FLOWSIC550 Flow Meter

Brand: Endress+Hauser
CSA CSA CRNs Available CRNs Available
Hydrogen Compatible Hydrogen Compatible
High-pressure gas flow meter for natural gas distribution
 
The cutting-edge technology for natural gas measurement: The new FLOWSIC550 ultrasonic compact gas meter from Endress+Hauser ensures highly accurate metering for low volumes at high pressures in gas distribution - a perfect addition to FLOWSIC500. In the absence of mechanical moving parts, the FLOWSIC550 is a robust, fail-safe and low-maintenance device, allowing for a significant reduction in operating costs. It is overload-proof, accurate and is monitored by an intelligent diagnostics system.

FLOWSIC550 can easily be integrated into existing measuring stations. The FLOWSIC550 operates either in an energy self-sufficient configuration or in network operation. When utilized in transfer and measuring stations, FLOWSIC550 ensures a continuous and blockage-free gas supply.

Features

  • Rugged and time-proven ultrasound technology
  • Diagnostics and permanent operational self-monitoring
  • Durable and reliable without moving parts
  • Compact meter installations
  • Integrated volume correction
  • Battery or intrinsically safe power supply
  • Bluetooth Low Energy (BLE)
Benefits
  • Ultimate measurement certainty and safety of continuous gas supply
  • Simple installation and replacement of turbine gas meters
  • Reduction of installation costs due to integrated volume correction
  • Easy Commissioning and data reading via FLOWgateTM (PC and App)
  • Minimal operating costs due to being nearly maintenance-free
  • Reliable even when the gas flow fluctuates (on/off applications)
  • Self-sufficient operation possible
High-pressure gas flow meter for natural gas distribution
 
The cutting-edge technology for natural gas measurement: The new FLOWSIC550 ultrasonic compact gas meter from Endress+Hauser ensures highly accurate metering for low volumes at high pressures in gas distribution - a perfect addition to FLOWSIC500. In the absence of mechanical moving parts, the FLOWSIC550 is a robust, fail-safe and low-maintenance device, allowing for a significant reduction in operating costs. It is overload-proof, accurate and is monitored by an intelligent diagnostics system.

FLOWSIC550 can easily be integrated into existing measuring stations. The FLOWSIC550 operates either in an energy self-sufficient configuration or in network operation. When utilized in transfer and measuring stations, FLOWSIC550 ensures a continuous and blockage-free gas supply.

Features

  • Rugged and time-proven ultrasound technology
  • Diagnostics and permanent operational self-monitoring
  • Durable and reliable without moving parts
  • Compact meter installations
  • Integrated volume correction
  • Battery or intrinsically safe power supply
  • Bluetooth Low Energy (BLE)
Benefits
  • Ultimate measurement certainty and safety of continuous gas supply
  • Simple installation and replacement of turbine gas meters
  • Reduction of installation costs due to integrated volume correction
  • Easy Commissioning and data reading via FLOWgateTM (PC and App)
  • Minimal operating costs due to being nearly maintenance-free
  • Reliable even when the gas flow fluctuates (on/off applications)
  • Self-sufficient operation possible

Specifications

Certifications & Approvals

CSA CSA CRNs Available CRNs Available

Hydrogen Compatibility %

Hydrogen Compatible up to 30% Hydrogen Compatible up to 30% Hydrogen Compatible up to 20% Hydrogen Compatible up to 20%

Measuring Range

  • Volume Flow, a. c., 2": 88 to 7,062 cfh
  • Volume Flow, a. c., 3": 226 to 17,660 cfh

Repeatability

  • ≤ 0.1 %

Accuracy

  • Accuracy Class 1; Maximum Allowed Error Limits
  • Qmin up to 0.08 Qmax: ≤ ± 2 %
  • 0.08 QmaxUup to Qmax: ≤ ± 1 %

Gas Temperature

  • -40° to 158° F

Operating Pressure

  • ANSI 300 (ASME B16.5): 72.5 to 705 psi(g) for 158° F; 72.5 to 740 psi(g) for -40° to 100° F
  • ANSI 600 (ASME B16.5): 72.5 to 1,410 psi(g) for 158° F; 72.5 to 1,480 psi(g) for -406 to 100° F

Sealing Surface

  • Raised Faced, Stock Finished

Ambient Temperature

  • -40° to 158° F

Certifications & Approvals

  • OIML R 137-1&2:2012
  • AGA 9, 2022
  • NEC/CEC (US/CA)

Enclosure Rating

  • IP66

Digital Output

  • 2x Pulse and Status (HF with fmax = 2 kHz, LF with fmax = 10 Hz)
  • Modbus: 2x RS-485, External Powered

Bluethooth

  • Bluetooth Low Energy 4.2 Adapter or Wired M12/USB Adapter

Material in Contact With Media

  • Low Temperature Carbon Steel

Mounting

  • Horizontal or Vertical Installation with 3D Straight Inlet and 2D Straight Outlet Piping

Electrical Connection

  • Intrinsically Safe Supply 8-16 VDC, max. 50 mA
  • Battery Powered (Life Time Over 5 Years)

Weight

  • DN 50: 20 kg
  • DN 80: 40 kg

Why Choose Endress+Hauser FLOWSIC550

 

Value Elements
  • High-Pressure Ultrasonic Gas Measurement
    • Designed for accurate low-volume natural gas measurement in high-pressure distribution networks.
    • Ultrasonic technology uses sound pulses to measure gas flow without relying on mechanical movement inside the meter body.
  • High Turndown Ratio for Variable Demand
    • A high turndown ratio allows the FLOWSIC550 to measure a wider range of natural gas flow rates with one meter.
    • This is valuable in Canadian gas distribution systems where seasonal heating demand can create large differences between winter and summer flow.
  • Low-Maintenance Meter Design
    • With no moving parts, the FLOWSIC550 reduces wear-related issues common with traditional turbine and mechanical gas meters.
    • This supports lower operating costs and improved reliability at important natural gas measurement points.
  • Compact Installation and Easy Integration
    • The compact FLOWSIC550 design fits tight high-pressure meter stations and integrates well into existing gas measurement installations.
    • It is a strong option for turbine meter replacement or station modernization projects.
  • Integrated Volume Correction and Diagnostics
    • Integrated volume correction can reduce the need for separate correction equipment and simplify natural gas meter station design.
    • Built-in diagnostics and FLOWgate access make commissioning, data reading, and meter health checks easier for field and operations teams.
 
Comparison vs. Next Best Alternative (NBA)
  • FLOWSIC550 vs. Traditional Turbine Gas Meters
    • Unlike turbine gas meters, the FLOWSIC550 uses ultrasonic measurement to avoid wear-related accuracy loss and maintenance concerns.
    • It also includes integrated volume correction, which can reduce external equipment requirements in the meter run.
  • Stronger Fit for Compact High-Pressure Stations
    • The FLOWSIC550 is well-suited for compact high-pressure natural gas installations where space is limited or existing turbine meters need modernization.
  • Improved Visibility Into Meter Health
    • Continuous self-monitoring gives operators better insight into meter condition and supports more informed maintenance decisions.
  • Reliable Performance With Fluctuating Flow
    • The FLOWSIC550 performs reliably in fluctuating or on/off natural gas flow conditions, making it a strong option where flow is not steady or predictable.
 
Where Do I Use This Product and Why?
  • Canadian Natural Gas Distribution Systems
    • Use the FLOWSIC550 where low-volume natural gas flow must be measured accurately at high pressure, especially where billing accuracy, reliability, and compact installation matter.
  • Custody Transfer and City Gate Stations
    • The FLOWSIC550 is well-suited for custody transfer points, town border stations, and city gate stations where accurate, accountable natural gas measurement is required.
  •  Remote or Space-Constrained Meter Stations
    • Compact design and flexible power options make it practical for remote Canadian gas meter stations or installations where footprint and power availability are limited.
  • Turbine Meter Replacement or Station Modernization
    • Choose the FLOWSIC550 when upgrading turbine gas meter installations to a modern ultrasonic gas meter with less wear, easier data access, and reduced maintenance.
  • Variable Seasonal Demand and Critical Distribution Points
    • The FLOWSIC550 supports dependable gas measurement through seasonal demand changes, fluctuating flow, and critical distribution applications where continuous gas supply matters.