Endress+Hauser GM32 In-Situ Gas Analyzer Delivers Sustainable Saving, Compliance Confidence
January 26, 2026
Over the past 12 months, process measurement devices like the GM32 in-situ gas analyzer developed initially by SICK have become staples in the Endress+Hauser‘s product lineup. They include best-in-class ultrasonic gas flow measurement, process gas analyzers, and gas and particulate analyzers, now sold, serviced and supported exclusively by Endress+Hauser Canada and its authorized distribution partners.
These in-situ and extractive analyzers excel in providing field proven benefits. For example, in measuring process or flue stack emissions, the GM32 delivers installation simplicity, with no need for gas sampling lines, gas treatment or measurement containers, with low operating and maintenance costs and automatic self-testing capability. The available cross-duct and probe versions provide direct, fast measurement of up to four gases (NH3, NO, NO2, O2, with optional SO2 and H2O channels) as well as the process temperature and pressure, in real time. Surges in emissions can be recognized and addressed well before they breach regulatory limits. Readings on critical flue stack emissions are usually available in two minutes or less.
GM32 analyzers also can provide an excellent return on investment in process control, like the following case study data from a cement plant where it is used to measure nitrogen oxides (NOX) at the intermediate catalytic reduction stage. Catalytic reduction involves injecting large quantities of ammonia (NH3) water/urea reagent into the process to neutralize NOX. Undercompensating with reagent would result in NOX emissions exceeding regulatory limits. Absent real-time NOX measurement at the catalytic reduction stage, surges in emissions are only recognized in the flue stack, at which point cement plants tend to respond by overdosing with reagent to be on the safe side.
With the installation of the GM32 at the catalytic reduction system in this particular cement plant, the analyzer’s fast, accurate measurement capability enables precise control of the injection of reagent, avoiding overcompensating while maximizing NOX reduction. That has yielded a 15% decline in ammonia consumption, shaving US$930,000 off the plant’s full-year reagent cost of US$6.16 million.
That cost recovery represents a three-month payback for installing the GM32. Plume and odour events are fewer because of more timely administering of reagents, with less ammonium bisulphate buildup in the plant’s ducts and electrostatic precipitator thanks to the reduction in reagent consumption. In this application, the maintenance interval for the GM32 is large – 9-12 months, with an annual operating and maintenance cost of US$10,000.
As users can expect with the entire Endress+Hauser gas flow measurement and gas/particulate analyzer portfolio, the GM32’s proven reliable technology and rugged construction provides process optimization and/or confidence in regulatory compliance over an extremely long service life.
About Endress+Hauser
Endress+Hauser is a global leader in measurement instrumentation, services and solutions for industrial process engineering. Our products – sensors, instruments, systems and services for level, flow, pressure and temperature measurement as well as analytics and data acquisition – set standards in quality and technology. The company further supports its customers with automation engineering, logistics and IT services and solutions. Founded in 1953 by Georg H Endress and Ludwig Hauser, the Endress+Hauser Group has been solely owned by the Endress family since 1975.
Today, the Group is managed and coordinated by a holding company based in Reinach, Switzerland, employing 17,046 personnel across the globe at year end. In 2024, the Group generated net sales of 3.744 euros (C$5.80 billion). Endress+Hauser’s production centres in 12 countries meet customers’ needs and requirements quickly and effectively, while its dedicated sales centres and strong partner network guarantee competent worldwide support.compliance over an extremely long service life.
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