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Use these links to access online technical support for Hach. If you don't find the information you need, please call us toll-free at 800-635-1230.

Manuals and Instructions
Click here to view or download pdf versions of Hach Sigma series product manuals and documentation.

Software Updates
Click here to view the latest software updates.

FAQ
Click here to view our list of frequently asked questions.

Obsolete Products
Click here to view a list of obsolete product reference and instruction guides.

NOTE: A password is required for some files, please contact Hach Technical Support  at 800-635-1230 for details.

 
 
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