Back in the 1970s, the only magnetic flowmeter company that could make flowmeters larger than 36 inches (914 mm) diameter was Ludwig Krohne AG. They private labeled large flowmeter primaries to a lot of companies. Now that's changed. Here's a nice big magmeter!

From the ABB press release:

Columbus, OH, April 06, 2010 -- Two 90-inch MagMaster electromagnetic flowmeters from ABB will measure the effluent from the city's new $45 million pump station at the Southerly Wastewater Treatment Plant. The two meters each have the capacity to measure 225 million gallons daily. The piping configuration provides for adding a third 90-inch magmeter in the future.