Ready to use — no mixing or dilution required Consist of polymer microspheres suspended in a pure, aqueous medium Uniform in particle size distribution to ensure consistent light scattering and precise enough to permit calibration down to and including 0 NTU Nontoxic and won't settle out of suspension Guaranteed accuracy within 1% Designed for 90° white light turbidimeters (EPA 180.1 design) Guaranteed one-year shelf life Order Info Available in three ranges
Each set consists of six 125mL bottles of primary standards
Compliance Fulfill U.S
EPA recommendations for linear calibration of each range used to permit instrument-to-instrument correlation