Leading Technology

Operators of gas storage facilities face specific measurement challenges:

High pressure and flow rates during injection and even higher flow rates during withdrawal. The withdrawn gas is saturated with water-vapor and can carry free water, depending on the geological formation of the reservoir.

In many applications all over the world, FLEXIM’s non-intrusive clamp-on ultrasonic flow measurement with FLUXUS® G proves to be the most suitable solution. FLEXIM’s FLUXUS® G gas flow meters work according to the same principle as their wetted counterparts, the transit-time difference principle (time of flight).

Compared to differential pressure devices such as orifices, the acoustic method offers accurate and reliable measurement over an almost unlimited flow range, regardless of the flow direction. As the transducers are simply clamped onto the outside of the pipe, they are not exposed to wear and tear and do not cause any pressure loss. Installation does not require any pipework and can easily take place during ongoing operation.

FLEXIM’s FLUXUS® G series comprises permanent and portable gas flowmeters certified for ATEX zones 1 and 2, FM and CSA Class 1. FLUXUS® G transmitters are the only ones that support both Lamb and shear wave transducers. As a result, the measuring system can be adapted to the most demanding applications.

Each pair of transducers is wet-flow calibrated at the factory. All calibration data is stored in a transducer-resident non-volatile memory and is automatically transferred to the transmitter upon connection.

Approved accuracy

Today, FLUXUS® G stands its ground in gas storage operations worldwide. FLEXIM’s ultrasonic gas flowmeters have been approved by major gas companies. Renowned and independent calibration rigs and laboratories have tested and verified their performance.

Driven by the requirements of UGS operations, a recent study was conducted at the Colorado Experiment Engineering Station Inc. (CEESI) with the aim of verifying the capabilities of FLUXUS® G under wet gas conditions. Even at elevated liquid volume fractions, the flowmeter showed reliable readings.

The advantages of non-intrusive ultrasonic flow measurement are certainly not confined to the gaseous state. The FLUXUS® F is the ideal solution for the measurement of liquids such as produced water or glycol. Together with FLEXIM’s patented WaveInjector for measurement at extreme temperatures, FLUXUS® F can even be used to measure Liquefied Natural Gas (LNG).