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If you have any specific questions about our products or services, please feel free to contact our Customer Service Department:

By Phone:

800.368.2723 (Toll Free US and Canada)
301.874.5599 (outside US and Canada)
800.635.1230 (24/7 Technical Support)

By Fax:

301.874.8459

By E-mail:

Sales - hachflowsales@hach.com
Tech Support - hachflowservice@hach.com
You may also complete an on-line contact form

Please note that telephone support is available Monday through Friday between 9:00 AM and 5:00 PM U.S. Eastern Time.


Online Calc

Online Calculator

On-line open channel & full-pipe flow calculator for pros in the water & wastewater field.

» Calculator link

Ask the Experts

Over 50 years of combined experience
to assist you with your flow monitoring inquiries.

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Focus on Flow

Focus on Flow

Product & technology newsletter.

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Free Flow Application Review

Allow us to evaluate and recommend the ideal solution for your flow monitoring application.

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Copyright © 2011 Hach Company

800.368.2723 Toll Free US & Canada • 301.874.5599 Outside US & Canada • 800.635.1230 24/7 Technical Support