About Non-Intrusive Flow Meters
Setting the standard for non-intrusive flow measurement
Setting the standard for non-intrusive flow measurement
Emerson’s Flexim Non-Intrusive Ultrasonic flow measurement technologies measure virtually anything that flows, liquids as well as gases. 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. As our products meet the highest requirements of industrial production, safety and the highest level of plant availability on the other operators can easily measure flow anywhere.
FLUXUS® clamp-on ultrasonic systems determine the volume flow according to the transit-time difference method. Since the ultrasonic signal that is irradiated into the pipe is carried by the medium 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 measuring transmitter calculates the volume flowrate based on the parameters input for the pipe geometry and the physical properties of the medium 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 ISO/IEC 17025:2018. Calibration is carried out on individual calibration equipment according to national standards. Flexim calibrates pairs of transducers and measuring transmitters independently of one another so that the narrowly defined measurement uncertainties are always observed, regardless of which transducers are used.
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 medium, be it liquid or gas, regardless of the flow direction (bidirectional) 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 onsite without the need of process interruption. This flow meter verification solution saves cost while ensuring the performance of your non-invasive 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 provides the documentation required for your quality management system.
Flexim FLUXUS® G gas flowmeter series is the measurement system of choice wherever gas poses a hazard, be it is explosive, toxic, or chemically aggressive. Wetted flowmeters would wear out quickly. Therefore, FLUXUS G is used to measure the flow of natural gas, from the production well to the consumer.
Emerson Flexim has opened up the world of non-intrusive ultrasonic flow measurement by providing solutions for particularly challenging measurement tasks. Ultrasonic transducers mounted on the outside of the pipe do not suffer wear and tear by any media and cannot become clogged by any particles.
Emerson Flexim has paved the way for the non-intrusive flow measurement of steam with clamp-on ultrasonic technology. High-temperature steam measurement at temperatures over 356 °F is based on a different measurement principle: cross-correlation measurement. Two ultrasonic transducer pairs are mounted onto the pipe at a specific distance to each other forming two gates. They send ultrasonic signals through the pipe. The modulation of the signals tracks turbulence characteristics of the steam flow. This powerful device is portable and can also measure liquids, gases, compressed air and heat, delivering a veritable multi-tool for maintenance and energy managers.
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-invasive FLUXUS CA ultrasonic air flowmeter series offer 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, 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 device separates the ultrasonic transducers thermally from the pipe thereby extending the application range of non-intrusive clamp-on ultrasonic technology to temperatures of -328 °F to 1166 °F. The WaveInjector® is a transducer mounting device. 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 simply 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.
Refractometry – in other words, the measurement of light refraction – has proven itself as a method of analytics in the laboratory time and time again. The Flexim PIOX® R process refractometer transfers laboratory accuracy into the process. In contrast to laboratory refractometers, PIOX® R measures using the transmitted light method. With a reproducibility of the refractive index nD 0.00002, very precise concentration measurements can be achieved. Furthermore, the monochromatic measuring beam is refracted by a biprism in two different directions which means the refraction of two light beams can be measured. The difference between the two resulting peaks is measured. The patented measuring method ensures stable measuring results, even in case of temperature and pressure fluctuations in harsh process environments.
