Hach Flow

Ask The Experts

Over 50 years of combined experience in the flow industry to assist you with your inquiries.

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Flow Calculator

On-line open channel & full-pipe flow calculator.

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Trade Show Schedule
Please click here to see the trade shows we will be attending.

Hach Flow is a world-class manufacturer of innovative and reliable open channel flow meters that is the first choice for flow professionals in the wastewater industry. Innovation, reliability, and accuracy are the hallmark of our products as well as an unrivaled support and sales network. 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…

Sewer and Open Channel Flow Meters

Our award-winning Flo-Tote™ flow meter changed the industry. Flo-Dar, Flo-Tote™, and the Sigma family of flow meters are perfect for long-term metering, short-term studies, billing, I&I, SSES, and much more. » Read more

Portable Flow Meters

The Flo-Mate™remains the professional's first choice for quick, accurate, and reliable flow monitoring. Perfect for streams & rivers, sewer spot checks, weir & flume calibrations, and other flow applications. » Read more

Data Delivery Services

A new approach to sewer flow metering! All the accuracy and reliability you've come to expect from Marsh-McBirney without the capital expense of purchasing a flow meter. You only pay for good, quality data. » Read more

Product Support

We recognize that timely support is important to you. We have attempted to provide as many manuals and other support documents on our website as possible. » See more details