About Non-Intrusive Flow Meters
Setting the standard for non-intrusive flow measurement
Setting the standard for non-intrusive flow measurement
Emersons Flexim non-intrusive ultrasonic flow measurement technologies measure virtually anything that flows: liquids as well as gases and steam. Our proprietary clamp-on ultrasonic flow meters enable operators to simply attach the transducer to the outside of the pipe – without any interruption to operations or any risk of leakage. Our products meet the maximum requirements of industrial production and safety, and deliver the highest level of plant availability.
FLUXUS® clamp-on ultrasonic systems determine the volumetric flow rate according to the transit-time difference method. Since the ultrasonic signal that is irradiated into the pipe is carried by the fluid flowing inside, a time delay occurs between the acoustic transit time both with and against the flow of direction. This time delay can be measured very accurately. The transmitter calculates the volumetric flow rate based on the parameters input for the pipe geometry and the physical properties of the fluid stored in the internal database.
The reliability and accuracy of measuring systems depend on the quality of their manufacturing and calibration. Consistent quality management according to DIN ISO 9001 is essential for Flexim, which has a calibration laboratory certified to DIN EN ISO/IEC 17025:2018. Flexim is also the only manufacturer of ultrasonic flow meters that calibrates transmitters and sensor pairs independently from each other with its own, patented AperCal method. The calibration, traceable to national standards, is not being performed on a flow rig and thus, it eliminates uncertainties of pipe or installation characteristics.
The Flexim FLUXUS® non-intrusive ultrasonic flow meters are used wherever something flows. Clamp-on technology opens up an unrivaled wide range of applications as the FLUXUS® device reliably measures the flow of virtually any fluid, be it liquid, gas or steam, regardless of the flow direction (bi-directional) and over an extremely wide measuring range. Due to its practical advantages, external flow measurement with clamp-on ultrasonic transducers has become a standard measuring technique in a broad range of industries and applications.
Advanced Meter Verification (AMV) allows you to check the health of your Flexim flow measurement device directly on site without the need for process interruption. This saves cost, while ensuring the performance of your non-intrusive flow measurement. The continuous acquisition and permanent storage of diagnostic values by the transmitter enables regular verification. Based on this data, maintenance can be planned, and unexpected failures can be avoided. Operators can automatically generate a flow meter verification report, providing the documentation required for your quality management system.
Letting our experienced service technicians carry out flow measuring tasks at your site can save you considerable resources that can be used on more efficiently on other duties.
Our flow meter services are arranged according to your individual needs:
From the measurement of volumetric and mass flow rates of liquids and gases over a wide media, temperature, and pressure range;
Over the energy survey of heat and cold quantities or also the consumption of compressed air within your site;
Up to flow measurements at high temperature pipes up to 1166 °F (630 °C).
Depending on the region, these services include on-site measurements, laboratory analysis, project handling, training, commissioning, instrument rentals and consulting services.
FLUXUS® G gas flow meter series from the Emerson Flexim portfolio sets the standards for non-intrusive ultrasonic gas metering. Clamped onto the outside of the pipe wall, these bi-directional gas flow measurement devices measure any kind of gas. They are available as both portable and stationary types. By integrating additional process parameters such as pressure and temperature, FLUXUS® gas flowmeters also provide high precision measurement of mass flow rate as well as operational and standard volumetric flow rates. FLUXUS® G is also the flow meter of choice wherever gas poses a hazard, be it explosive, toxic, or chemically aggressive.
Flexim FLUXUS® F ultrasonic liquid flow meters measure the flow rate of liquids non-intrusively with transducers mounted on the outside of the pipe. They are available as both portable and stationary types. Emerson Flexim can supply basic ultrasonic liquid transmitters for non-intrusive flow measurement of water, special measuring systems for high-precision recording of the lowest flow rates, for flow measurement of cryogenic to really high temperatures, or even for use in potentially explosive areas or submerged under water. Emerson Flexim is also the only supplier of SIL2-certified clamp-on ultrasonic transducers for use for safety functions.
Emerson Flexim has paved the way for the non-intrusive flow measurement of steam with clamp-on ultrasonic technology. FLUXUS® ST-LT measures volumetric and mass flow rates of saturated and superheated steam at temperatures up to 180 °C (356 °F ) using the transit-time difference principle. The system is available as both a stationary and a portable meter. The stationary FLUXUS® ST-HT has been specifically engineered for high-temperature applications above 240 °C (464 °F) and is based on the correlation flow measurement method. In combination with the WaveInjector® mounting fixture, FLUXUS® ST-HT systems push our solutions for clamp-on ultrasonic steam measurement up to 630 °C (1,166 °F)!
Measuring compressed air flows precisely in all conditions with a high-pressure air flow meter is the key to improving the energy efficiency of compressed air systems while reducing costs.
Using state-of-the-art technology, the non-intrusive FLUXUS® CA ultrasonic air flow meter series offers a permanent or portable solution that is ideally suited for carrying out energy audits, metering the consumption of compressed air, checking existing meters, detecting potential leaks, balancing plant networks as well as monitoring compressor efficiency.
Based on Flexim's clamp-on flow measurement technology, FLUXUS® TE combines the volumetric meter and energy calculator in just one transmitter. Equipped with up to 2 flow measuring channels and up to 4 temperature inputs, it delivers measured values such as current flow or mass flow rate, thermal energy rate, temperatures and also corresponding counter functions.
Applications such as heating, and cooling can be easily implemented.
The Flexim WaveInjector® technology is used in extreme temperatures. The patented transducer mounting device separates the ultrasonic transducers thermally from the pipe thereby extending the application range of non-intrusive clamp-on ultrasonic technology to temperatures of -200 to 630 °C (-328 to 1166 °F). So much heat is radiated or absorbed via its metallic coupling plates that the temperature of the transducer clamping fixture lies within the working range of the ultrasonic transducers. The WaveInjector® is also mounted on the outside of the pipe without having to open the pipeline. Since it is a purely mechanical arrangement, the WaveInjector® can also be used in potentially explosive areas.
Emerson Flexim mass flow meters measure the flow velocity, and they use the sound speed to determine concentration or density of binary liquid solutions. Combining both flow and density the PIOX S provides a mass flow rate reading. Typical applications are sulfuric and hydrochloric acid, caustics, brines, and nitrogen fertilizer products. The clamp-on technology with no wetted parts is ideal for analyzing challenging fluids. When only density and concentration measurements are required, Flexim offers the PIOX® R inline process refractometer. It combines the long-established concept of the concentration meter with the innovative transmitted light principle. This unique technology provides online concentration with outstanding precision. Both systems can also be used in combination, to analyze more complex media in customer specific applications.
Oil & Gas production, transportation, and storage operations are subject to the highest and most complex process conditions and to strict standards of performance, availability, and efficiency. Accurate, reliable, and cost-effective clamp-on oil and gas flow meters are specifically designed to withstand the extreme processes and ever-changing conditions of the industry. Our non-intrusive, clamp-on ultrasonic flow meters are the perfect solution for high pressures, high temperatures, abrasive fluids, and safety requirements across the industry.
The operational conditions within chemical sites are very demanding. A wide range of organic and inorganic fluids are handled, some of which are flammable, toxic, or highly corrosive. Furthermore, extreme temperature ranges can be encountered. It is under these challenging conditions that the outstanding advantages of the non-intrusive clamp-on chemical flow and concentration meters become most apparent. They are maintenance-free and offer excellent accuracy and repeatability.
The strict requirements of the food & beverage industry for hygienic design, measuring performance and accuracy are easily met by Emerson Flexim flow meters. With the use of the sanitary FLUXUS® flow measurement systems, the risk of contaminating pure fluids or creating problematic hygienic “dead spots” within a product line is excluded. 100% hygienic and 100% contamination free.
Our range of water flow meters are useful in a wide range of applications across multiple industries, including potable water treatment, wastewater treatment and metering for water distribution. Our clamp-on ultrasonic water flow meters can be installed without any service interruption or pipework alterations. Because they make no contact with the water itself, these ultrasonic water flow meters are a hygienic solution, and they cause no wear to pipes and other components.
Modernization is essential for driving efficient power generation. Non-intrusive instrumentation for steam flow measurement in power plants and other applications means no interruption in supply and no direct contact with the process fluids. This makes our energy consumption measurement solution also free of maintenance and helps power plant operators to monitor and control their processes with the highest efficiency and outstanding flexibility.
The mining industry faces some of the harshest industrial environments. Accurate, reliable and durable flow monitoring is crucial to maintain well balanced and optimized minerals processing. The flowing fluids, most often abrasive mineral slurries, corrosive leach solutions or toxic chemicals, cannot damage or wear the non-intrusive Flexim transducers.
Wood is the most important raw material in industrial paper production. The main processes involve the processing of wood chips and the subsequent pulp production. When it comes to guaranteeing consistent paper quality, the right mixture is key. This is where Flexim’s flow and concentration measuring technologies come into play, especially in difficult applications when measuring the highly corrosive liquors or the flow of slightly adhesive substances like glue and paste or highly abrasive slurries and pulps.
Easy to retrofit and reliable thermal energy flow measurement devices, Flexim flow meters for chilled water and hot water are an ideal technology for today’s energy management, submetering and monitoring measuring tasks. Hot water and chilled water flow meters serve an important function in maintaining an efficient system.
Check and monitor the functionality and internal leak rate of the green, yellow and blue hydraulic systems for the complete, left-hand wing, right-hand wing and tail sections of the aircraft without the need for any direct works on the hydraulic lines. These hydraulic oil flow meters are clamped directly to the hydraulics line. The use of ultrasonics enables these hydraulic flow meters to do their job without lengthy installation times or creating obstructions on the line. Their non-intrusive nature and accuracy make them some of the most important hydraulic measuring instruments available today.
