Standard Calibration Solution Set for Apera Instruments TN400 Portable Turbidity Meter.
AMCO Clear turbidity standard solutions (0.02 NTU, 20.0 NTU, 100 NTU, 800 NTU).
AMCO Clear is an EPA approved primary standard for calibration of turbidity sensors that is safe, non-toxic and disposable. It is NIST traceable to particle size/distribution and optical density, and its inherent stability means it does not settle from suspension.
The standards have a guaranteed one-year shelf life even if you've opened the bottle and happened not to have recapped it tightly. The convenient submicron polymer suspensions are non-toxic primary calibration standards approved by the US EPA for drinking water analysis for turbidity.
AMCO Clear is the unique, non-toxic low-level turbidity standard that can reliably read from 0.02 NTU to 10,000 NTU every time.