Hach Gelex Secondary Turbidity Standard, 200-4000 NTU, 2589104By Hach $107.00 | EA Quantity discounts available QuantityPrice Product #: 701713Mfr. Part #: 2589104Out of Stock - Ships in 22 Days Quantity -+ Add to Cart Free Ground Shipping On All Orders Over $1500!*Conditions Apply* Details Description Gelex Secondary Turbidity Standard, 200-4000 NTU, for 2100N, 2100AN, 2100AN IS Turbidimeter. Features Sealed, 200-400 NTU se... DetailsBackDescription Gelex Secondary Turbidity Standard, 200-4000 NTU, for 2100N, 2100AN, 2100AN IS Turbidimeter. Features Sealed, 200-400 NTU secondary standard for Hach 2100N, 2100N IS, 2100AN, 2100AN IS Turbidimeters Require no preparation, dilution or special glassware Documents Safety Data Sheet California residents see Prop 65 WARNINGS