Can the 2100Q and 2100Qis Portable Turbidimeters be used in drinking water, fresh water, and salt water?

Document ID

Document ID TE3728

Published Date

Published Date 27/05/2017
Question
Can the 2100Q and 2100Qis Portable Turbidimeters be used in drinking water, fresh water, and salt water?
Summary
Applications of use for the 2100Q and 2100Qis Portable Turbidimeters
Answer
The 2100Q Portable Turbidimeter (Catalog Number/Order Code 2100Q01) can be used in both fresh water and salt water. It is most commonly used in the application of potable (drinking) water testing, because its test procedure adheres to the United States Environmental Protection Agency's (USEPA) requirement that test procedures for the analysis of contaminants under its Safe Drinking Water Act (40 CFR 141) follow the method given in the Standard Methods for the Examination of Water and Wastewater (SM), section 2130 B (Nephelometric Method) or by USEPA Method 180.1. The United States Geological Survey also references the USEPA method 180.1 for the determination of turbidity in high-salt and brackish waters.

The 2100Qis Portable Turbidimeter (Catalog Number/Order Code 2100QIS01) does not adhere to Standard Methods 2130 B and USEPA Method 180.1, specifically with its light source. Both the SM method and USEPA method requires a light source that is a Tungsten-filament lamp operated at a color temperature between 2200 and 3000 °K. The 2100Qis model uses an LED light source specifically at 860 nm and is instead compliant to the International Organization for Standardization (ISO) 7027 method for turbidity. The ISO 7027 method is commonly cited in high-salt and brackish water testing as well.