Panametrics ultrasonic flow meter for gas

PanaFlow FLI

PanaFlow FLI is a robust and reliable ultrasonic flow measurement system for monitoring wide ranging gas flow in challenging conditions. PanaFlow FLI is available in either a flowcell (spoolpiece) or nozzle only design providing flexibility to your existing or new flow requirements.

Applications Examples
• Fuel gas
• Natural gas
• Vent gas
• Waste gas
• Shale gas
• Coal-seam gas
• Vapor recovery
• Biogas
• Flare gas
• Steam

Features and benefits
• Trusted ultrasonic technology with no drifting measurements or need for periodic calibration requirements.
• No restriction in the pipe to generate a pressure loss.
• Wide rangeability from 0-100m/s (328 ft/s) monitoring during all process scenarios.
• Robust and field proven legacy Panametrics titanium gas transducers; other materials available based on stream composition.
• New compact insertion mechanism for 24hr/7day continuous operation and access to transducer.
• Advanced diagnostics to understand and track the health and stability of the process.

Transit Time Flow Measurement
In this method, two transducers serve as both ultrasonic signal generators and receivers. They are in acoustic communication with each other, meaning the second transducer can receive ultrasonic signals transmitted by the first transducer and vice versa.

In operation, each transducer functions as a transmitter, generating a certain number of acoustic pulses, and then as a receiver for an identical number of pulses. The time interval between transmission and reception of the ultrasonic signals is measured in both directions. When the gas in the pipe is not flowing, the transit-time downstream equals the transittime upstream. However, when the gas is flowing, the transittime downstream is less than the transit-time upstream. The difference between the downstream and upstream transit times is proportional to the velocity of the flowing gas, and its sign indicates the direction of flow.

Best Technology For Difficult Gases
Ultrasonic flow measurement is independent of gas properties and does not interfere with the flow in any way. All metal ultrasonic transducers installed in the pipe send sound pulses upstream and downstream through the gas. Panametrics advanced ultrasonic transmitters use advanced signal processing and correlation detection to calculate the flow rate in challenging conditions such as unsteady or even bidirectional flow, pulsating pressure, varying composition and temperature, harsh environment, and extreme wideranging flows.