WATER / WASTEWATER Clamp-on ultrasonic flow measurement modernises industrial water management


Emerson’s Flexim clamp-on ultrasonic flow measurement offers a non-intrusive method for accurately determining fluid flow within a pipe. By placing transducers on the outside of the pipe, ultrasonic signals are transmitted through the pipe wall and fluid. The difference in signal transit times provides a precise calculation of flow velocity. This technique eliminates the need for pipeline modifications, making it ideal for applications where operational continuity and low maintenance are critical.


At one of the major industrial sites along the Lower Rhine, water is an indispensable raw material. It supports a wide range of applications – from chemical processing and energy generation to cooling and cleaning. The operator centrally supplies different grades of water, including drinking, demineralised, and large volumes of process and circulation water.


Annually, the site moves approximately 760 million cubic meters of water through a vast pipe network. The majority serves as process water for through- flow cooling and circulation water for temperature regulation. This scale of usage is energy-intensive, with hundreds of pumps and drives consuming around 240,000 megawatt hours of electricity each year.


Optimising water use isn’t just an environmental goal – it’s an economic and energy imperative. And optimisation starts with accurate measurement.


Historically, a measuring orifice was used to monitor raw water flow into a storage tank, providing a reliable means of capturing key data. As operational demands evolved, and the focus shifted toward energy efficiency and streamlined maintenance, engineers began exploring alternative technologies. The goal was to implement a modern solution that could be integrated seamlessly – without requiring service interruptions or modifications to existing infrastructure.


Thanks to the previous successful applications at the same site, engineers opted to retrofit an existing DN300 steel pipeline with a stationary clamp-on ultrasonic flow meter. This choice was based on a proven track record of performance in demanding industrial conditions.


Clamp-on systems offer key advantages, such as installation without pipe modifications, no risk of contamination, zero pressure loss, and minimal maintenance. These benefits were particularly important given the volume and criticality of the water being measured.


Years earlier, a successful on-site demonstration – conducted under challenging conditions, including poor pipe surfaces and internal buildup – showcased the effectiveness of clamp-on ultrasonic technology. Since then, numerous clamp-on meters have been installed throughout the water management system, reliably measuring a wide range of media, including raw water, steam, condensate, and even gases such as ammonia.


The retrofit was completed without any operational downtime, and the new setup introduced no energy loss or mechanical wear. For a facility managing such massive water volumes and energy loads, these small improvements translate into significant long-term gains.


Clamp-on ultrasonic flow measurement has evolved from a niche solution into a robust, industry-proven technology. In large-scale water systems where reliability, accuracy, and efficiency are essential, non-intrusive flow monitoring is now a cornerstone of sustainable infrastructure.


More information online: ilmt.co/PL/VGMk For More Info, EMAIL:


EMAIL: 65807pr@reply-direct.com


Advances in N₂O and CH₄ emissions monitoring for


wastewater treatment


compliance The monitoring of greenhouse gas emissions from wastewater treatment plants is rising on the regulatory agenda. Under new EU requirements, operators are required to track the emissions of nitrous oxide (N₂O) and methane (CH₄) to reduce their environmental impact and enhance transparency.


N₂O is of particular concern. It is primarily produced during biological nitrogen removal and has nearly 300 times the global warming potential of carbon dioxide (CO₂). Reliable measurement of N₂O, along with CH₄ and CO₂, is therefore a critical step in assessing plant performance and developing mitigation strategies.


Continuous, precise monitoring is technically demanding because it requires distinguishing between multiple gases and avoiding cross- sensitivities that can distort data. Fulfilling these requirements requires stable, selective analytical technologies that can provide reliable long-term performance in challenging plant environments.


One example of this is smartGAS’ SILAREX WWE system, designed specifically for wastewater treatment applications. The system enables the simultaneous detection of N₂O, CH₄, and CO₂, providing accurate results that operators can use for regulatory reporting and process optimisation. By recognising emission patterns, treatment processes can be adjusted to reduce greenhouse gas emissions while maintaining efficiency.


More information online: ilmt.co/PL/6DBX For More Info, EMAIL:


EMAIL: 65921pr@reply-direct.com ENVIROTECH-ONLINE.COM | AET NOVEMBER 2025 | 11


Myron L® The 6PFCE


Company Ultrameter II 6PFCE features a comprehensive suite of in-situ water quality analysis tools


designed to replace more costly and less convenient laboratory equipment. A true one-handed instrument, the 6PFCE


Unlike other similar meters, the 6PFCE measures Conductivity, Resistivity, TDS,


pH, ORP, Free Chlorine Equivalent (FCE™), and Temperature quickly and easily with the press of a button.


Conductivity and TDS functions allow


you to select the solution type used to model the solution under test: KCl; NaCl; Myron L’s own 442 Natural Water™ Standard; or USER, programmable by you to model a known solution. The result is benchtop accuracy of ±1% of reading in a handheld instrument. Accuracy increases to ±.1% of reading at calibration point. Temperature compensation is automatic to 25°C or can be disabled by the user as required. Autoranging capabilities provide increased reading resolution across a broad range of applications.


pH measurements are also temperature compensated, and you can choose to perform a 1-, 2-, or 3-point calibration depending on the range of samples measured to achieve ±.01pH accuracy. The pH sensor is of a proprietary construction and includes a large potassium chloride solution reservoir for long life. Myron L pH sensors are also user replaceable.


ORP measurements utilize a 99.9% pure platinum electrode and a reference junction that is shared with the pH sensor. 6PFCE


accuracy is ±1 millivolt. In addition, the 6PFCE


ORP measurement


features a groundbreaking new way to determine Free Available Chlorine based on a predictive ORP value. Empirical readings of the chemical activity of a solution are made without the hassle and subjectivity of colorimetric and test-strip methods.


Calibration and maintenance are simple, so the 6PFCE can be serviced by the user. The 6PFCE is also IP67 dust-tight and waterproof, NEMA 6


submersible, and buoyant. Plus, Myron L service and technical support are included for the life of the product. More information online: ilmt.co/PL/MvlD


For More Info, EMAIL: EMAIL:


65850pr@reply-direct.com Precision Water Quality Analysis Ultrameter ll E TM Ultrapen PTBT Series


multiparameter and single parameter water testers


www.myronl.com 760-438-2021


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