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 The withdrawn gas is saturated with water-vapor and can carry free water, depending on the geological formation of the reservoir.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.
The FLUXUS G gas flow meter 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. The installation does not require any pipework and can easily take place during ongoing operation.

FLEXIM’s FLUXUS G gas flow meter series comprises permanent and portable gas flow meters certified for FM and CSA Class 1 as well as ATEX Zones 1 and 2. The FLUXUS G transmitters are the only ones on the market, 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, the FLUXUS G gas flow meter stands its ground in gas storage operations worldwide. FLEXIM’s ultrasonic gas flow meters 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 gas flow meters under wet gas conditions. Even at elevated liquid volume fractions, the flow meter showed reliable readings.

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