YSI turbidity solutions calibrate your instruments for maximum accuracy. Extremely accurate and stable solutions. We recommend that YSI-certified polymer-based standards are used for best results.

We recommend that YSI-certified polymer-based standards are used for best results. YSI's polymer-based standards are prepared and labeled so they are traceable to the EPA's primary standard, Formazin Polymer standards from other vendors may not be properly adjusted to meet…