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Description
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
Specifications
Brand
Certifications & Approvals
CSA 
CRNs Available Hydrogen Compatibility %
Hydrogen Compatible up to 30% 
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
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.
Gas Academy Blogs
Gas Academy Blogs
Is It Time to Move Beyond Turbine Gas Meters?
Featuring insights from an Endress+Hauser flow measurement expert, this CR Wall blog explores why Canadian natural gas utilities are transitioning to ultrasonic metering, the advantages over traditional turbine meters, and key considerations when evaluating replacement solutions.
Which Gas Meter Is Right for Your Application?
Explore the different types of gas meters used across Canadian natural gas distribution systems in this CR Wall Gas Academy blog. Learn how diaphragm, rotary, turbine, ultrasonic, and Coriolis technologies compare, including their advantages, typical applications, and key considerations when selecting the right metering solution.
