52430

This 250ml bottle ProCal primary turbidity standard has been certified by HF scientific for use in the Hach (R) 2100P portable turbidimeter (20 NTU). No formazin is used, making the standard safer, easier to use, accurate and less expensive that the equivalent Hach (R) product. In addition to being approved by the EPA, ProCal has been certified through testing conducted by HF scientific demonstrating that ProCal performs as well as Hach (R) primary turbidity standards in selected Hach (R) instruments.