A Watts Water Technologies Company USEPA approves HF scientific Primary Turbidity Standard “...the Office of Ground Water and Drinking Water’s Technical Support Center has concluded that HFscientific’s solution is an acceptable equivalent to currently approved primary polymer turbidity standards” EPA, Feb. 2010 Pro Cal Primary Turbidity Standard • Greener - safe and non-toxic • Two year shelf life • Cost Effective • Easy to use • Custom standards available • Traceable to Formazin ProCal turbidity standards are pre-diluted, factory certified*, and ready for use with not only the HF scientific turbidimeter product line but with other manufacturer’s instrumentation. The ProCal standard formulation utilizes a preservative that enhances stability, yet is safe and biodegrades rapidly in aquatic environments. *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® primary turbidity standards in selected Hach® instruments. Test results are available upon request. standards for use with other manufacturer’s instrumentation Hach® 1720 c/d/e Process Turbidimeter Hach® is a registered trademark of the Hach® Company, which is not affiliated with HF scientific. **GFS stands for GFS Chemicals of Powell, Ohio. 3170 Metro Parkway, Ft. Myers FL 33916 e-mail: [email protected] ph: (239)-337-2116 • fax: (239) 332-7643 • toll free: 888-203-7248 www.hfscienti

Hach® 2100N Laboratory Turbidimeter Hach® part # Hach® 2100AN Laboratory Turbidimeter Hach® part # Hach® 2100P Portable Field Turbidimeter