Since 1865, Marsh has been manufacturing the finest pressure and temperature instruments. Our legacy of manufacturing excellence is rooted in tradition, yet continues to evolve with time and technology.

Maybe it’s been a while since you’ve heard our name. Maybe you’re more familiar with names like Jas. P. Marsh & Company or Marshalltown Gauges. That’s us, too. And we’ve always been here, continuously operating since our founding a century and a half ago.

From the beginning, we’ve been the standard of accuracy.

We design, manufacture, and supply the highest-quality pressure gauges, thermometers, and accessories. Our measuring devices are trusted by process industries around the globe for their accuracy and reliability.

Our products are used in countless applications where accuracy, dependability, and adaptability to application environments are essential. Whether standard or specially designed, Marsh provides rugged, precision instruments for customers around the world.

We’ve never stopped. And after more than 150 years, we believe the best is yet to come.