E+H Proline Prosonic Flow G 500 Ultrasonic Time-of-Flight Flowmeter

Core Measurement Principle & Gas Quality Analysis

Operating on the transit time difference principle, the device measures gas flow velocity independently of the gas composition. When integrated with the advanced gas analysis package and built-in pressure/temperature cells, it goes beyond standard gas flow measurement. It enables continuous, 24/7 calculation of critical gas properties such as calorific value, Wobbe index, molar mass, methane fraction, and density—making it an ideal natural gas flow meter and process gas meter.

Robust Design and Uncompromised Reliability

Built to withstand harsh industrial environments, the wetted parts utilize high-grade 316L stainless steel and titanium (Grade 2), offering superior corrosion resistance. The gas flow meter features a specialized sensor design that remains completely immune to condensate accumulation, ensuring high reliability even under humid or wet gas conditions. Furthermore, the introduction of a standard digital ISEM electronics module inside the sensor housing enables simple transmitter replacement and stable digital flow transmitter performance.

Flexible Integration & Operation

The flow metering system supports extensive system integration via HART protocol and Modbus RS485, featuring up to four freely configurable inputs and outputs (current outputs, pulse/frequency/switch outputs, relays, and status inputs). Operators can easily configure and monitor the industrial instrumentation locally using the 4-line touch control display or remotely via a web browser, FieldCare, DeviceCare, and secure WLAN access points. Integrated Heartbeat Technology further allows for traceable verification and diagnostics without interrupting ongoing flow measurement processes.

Application

• Oil & Gas Industry: Custody transfer monitoring, production tracking, and distribution of natural gas and fuel gases.

• Chemical & Petrochemical Plants: Measurement of process gases, flare gases, reactive gas mixtures, and utility air.

• Energy & Power Generation: Monitoring of boiler feed gas, exhaust gas streams, and cogeneration fuel feeds.

• Environmental & Renewable Sector: Biogas and sewage gas production and recovery monitoring.

Technical Parameters

• Measuring Principle: Ultrasonic time-of-flight difference method

• Nominal Diameter Range: Single-path version: DN 25 (1″); Two-path version: DN 50 to 300 (2 to 12″)

• Measured Variables: Volume flow, mass flow, corrected volume flow, flow velocity, sound velocity, energy flow, density, and optional pressure/temperature/gas properties

• Flow Velocity Range: 0.3 to 40 m/s (0.98 to 131.2 ft/s) with specified accuracy; up to 60 m/s (196.8 ft/s) with reduced accuracy

• Maximum Measurement Accuracy: Volume flow: ±0.5% of reading (with optional calibration); Corrected volume flow: ±0.8% of reading

• Medium Temperature Range: -50 to +150 °C (-58 to +302 °F) without pressure cell; -50 to +100 °C (-58 to +212 °F) with integrated pressure cell

• Medium Pressure Range (MWP): Up to 100 bar (1450 psi) absolute, depending on the selected pressure measuring cell and process connections

• Wetted Materials: Measuring tube in stainless steel (1.4408/1.4409 / CF3M), flanges in 1.4404 (316/316L), ultrasonic transducers in Grade 2 titanium

• Outputs & Inputs: Up to 4 freely configurable I/Os (Current output 4-20 mA HART, Pulse/Frequency/Switch output, Relay output, Current/Status inputs, Modbus RS485)

• Power Supply: DC 24 V (±20%) or AC 100 to 240 V (50/60 Hz)

• Degree of Protection: IP66/67 (Type 4X enclosure) for both transmitter and sensor housings

• Operation Interface: 4-line illuminated graphic display with touch control, optical keys, and optional WLAN

FAQ

• Q1: Does this flowmeter cause any pressure drop in the pipeline? A1: No, the sensor design ensures that no pressure drop occurs when the device is installed in a pipe matching its nominal diameter.

• Q2: Can the device measure wet or humid gas accurately? A2: Yes, the sensor is specially designed to be insensitive to condensate, providing high reliability and accurate measurement even under wet or changing gas conditions.

• Q3: What communication protocols are supported for remote monitoring? A3: The device supports HART protocol (via 4-20 mA current output) and Modbus RS485, alongside integrated web server access via a service interface (CDI-RJ45) or optional WLAN.

• Q4: Is it possible to perform verification without interrupting the active process? A4: Yes, with the integrated Heartbeat Technology package, traceable functional testing and verification can be performed on-site without stopping the media flow.

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