Hach Company has manufactured products for the environment for more than 50 years. Our commitment to research and development and state-of-the-art manufacturing keeps us firmly at the forefront of technology.

For over 35 years, Marsh-McBirney has provided innovative and award winning flow instrumentation for the industrial and municipal markets.

With more than 27 years of experience and cutting-edge technology, Sigma is a worldwide leader in the design and manufacture of innovative flow, sampling, rain and water quality instruments, communication products and data management software. 

The combined strengths of Hach's Sigma and Marsh-McBirney flow meters provides our customers with over 70 years of flow experience with benefits such as 24/7 Technical Support, Flow Expert Forum, Uptime Guarantees, and more…