Dosing devices

For all EPA 180.1 turbidimeters

TEST Turbidity 300 NTU Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity 80 NTU +/- 0.8 Absorbance at 455nm (50mm pathlength) Lot Number of Baseline Material

TEST Turbidity 60 NTU +/- 0.6 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

Concentration 10,000 +/- 100 ug/ml Matrix: &lt1% NH4OH NIST Traceable

Transmittance (at 635 nm) 40%T +/- 0.4 %T

Transmittance (at 635 nm) 60%T +/- 0.6 %T

AA, or colorimetric standard

Turbidity 40 NTU +/- 0.4 Absorbance at 455nm (50mm pathlength) Lot Number of Baseline Material

TEST Turbidity 6.0 NTU +/- 0.06 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity 2.0 NTU +/- 0.02 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

AA, colorimetric or volumetric standard