Accurate gas calculations based on recognized standards
The new C571 Flow & Energy Computer, a dedicated solution for advanced gas flow measurement and energy monitoring applications, marks the second product introduced within the innovative C5-Series platform, following the launch of the C581 Flow & Energy Computer for water, steam and coolant applications. The C571 combines powerful calculation capabilities, broad flowmeter compatibility and user-friendly operation in a single field-mounted instrument.
Designed for natural gas, air, nitrogen (N₂), oxygen (O₂), hydrogen (H₂), carbon dioxide (CO₂), methane (CH₄) and other gas applications, the C571 Flow Computer performs advanced flow, energy and gas property calculations according to recognized standards such as AGA8 92DC and SGERG88(91). The result is reliable and accurate measurement data without the need for external calculation systems or complex PLC programming!
Accurate Gas Calculations Made Simple
The C571 single stream flow & energy computer continuously calculates mass flow, volumetric flow and power at actual and reference conditions. It also provides totalized values for volume, mass and energy, making it suitable for monitoring, reporting and optimization of industrial gas processes. A key strength of the C571 is its ability to internally determine gas properties such as compressibility, density, enthalpy and specific heat. These values can be calculated according to recognized industry standards such as AGA8 92DC and SGERG88(91), derived from interpolated tables or entered as fixed values. By performing these calculations directly within the instrument, users can simplify system architecture, reduce engineering effort and improve overall measurement accuracy.
Compatible with Any Gas Measurement Technology
Whether the application uses pulse-generating flowmeters, differential pressure flow elements or analog flow signals with temperature sensors and pressure transmitters, the C571 is designed to accommodate virtually any gas measurement setup. Flexible temperature and pressure measurement capabilities further simplify integration. The C571 supports Pt100, Pt500 and Pt1000 sensors in 2-, 3- and 4-wire configurations, 4-20mA temperature and pressure transmitters. Integrated Callendar-Van Dusen calculations ensure highly accurate temperature measurement across a wide operating range.
For differential pressure applications, the C571 supports all common ISO 5167 primary elements (including orifice plates, flow nozzles, Venturi tubes, cone meters and wedge meters) and others such as Pitot tubes. The instrument can process signals from a single differential pressure transmitter as well as from two or three stacked differential pressure transmitters, extending the usable measuring range while maintaining high accuracy. The C571 also supports averaging of 2 or 3 analog flow signals, further enhancing accuracy in challenging measurement applications and large-scale installations.
Ready for Real-World Gas Applications
The C571 is designed for a wide range of gas measurement and energy monitoring applications. Typical installations include natural gas distribution and metering stations, industrial gas supply networks, compressed air systems, hydrogen applications, gas-fired heaters, furnaces, dryers and process gas monitoring systems. Its advanced calculation capabilities also make the C571 particularly suitable for complex differential pressure flow measurements, gas mixing installations and applications where accurate determination of gas properties is essential for reliable process control, energy management or reporting.
Built for Industrial Performance
The C571 is housed in Fluidwell’s robust IP66/IP67 aluminum C5-Series field enclosure, engineered to withstand demanding outdoor and industrial environments. A large graphical display with adjustable backlight provides all critical process information at a glance, while the intuitive six-button interface ensures straightforward operation and configuration.
With extensive communication options including RS485, RS232 and USB, integrated data logging, flexible
Key Benefits
- Accurate gas calculations based on recognized standards
Calculate compressibility, density, enthalpy and specific heat according to internationally recognized standards such as AGA8 92DC and SGERG88(91), ensuring reliable flow and energy calculations. - Flexible property determination methods
Gas properties can be calculated according to recognized standards, derived from interpolated tables or entered as fixed values, providing flexibility for virtually any application. - One solution for diverse gas applications
Designed for natural gas, air, nitrogen, oxygen, hydrogen, carbon dioxide, methane, ideal gases and other gas applications. - Compatible with Any Gas Flow Technology
Supports pulse, analog and differential pressure flow measurement technologies, including all common ISO 5167 primary flow elements such as orifice plates, flow nozzles and Venturi tubes. - Extended measuring range with stacked dP sensors
Process signals from one, two or three differential pressure transmitters to improve measurement range and accuracy in demanding flow applications. - Advanced temperature and pressure measurement capabilities
Compatible with Pt100, Pt500 and Pt1000 sensors in 2-, 3- or 4-wire configurations, 4-20mA temperature and pressure transmitters. Accurate temperature determination is ensured through integrated Callendar-Van Dusen calculations. - Advanced flow and energy calculations
Calculate mass flow, volumetric flow and power at actual and reference conditions, while totalizing volume, mass and energy for monitoring and reporting purposes. - Fast response and high accuracy
With measurement and calculation updates up to 10 times per second and 11-point linearization on all inputs, the C571 delivers accurate real-time process information. - Clear process visibility at a glance
The large graphical display with bright adjustable backlight presents all important flow, pressure, temperature and energy information in a clear and intuitive format. - Easy to learn, easy to use
An intuitive menu structure, six-button keypad and free configuration software simplify commissioning, operation and maintenance. Know one, know them all. - Built for harsh industrial environments
The rugged IP66/IP67 aluminum enclosure withstands demanding outdoor and industrial conditions while ensuring long-term reliability. - Powerful communication and data logging
Integrated RS485, RS232 and USB communication, combined with extensive onboard data logging, provide seamless integration and valuable process insights.
I/O Overview
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Discover how the C571 can fit your gas measurement application.
Explore the complete technical specifications, signal inputs & outputs, calculation capabilities and configuration options.
Explore the C571 Flow & Energy Computer
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Mr. David Umana
USA Sales Office
T +1 (508) 731 - 6775
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Just send us a message or give us a call."
Mr. Albert Boyer
Global Sales Office
T +31 (0)413 343 786
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