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The following documentation compares the Hach 2100A and Hach 2100AN instruments for the measurement of turbidity in water. Both instruments were checked against primary formazin standards and purchased reference samples and produced equivalent accurate results.
Public Domain.
On October 1, 2000, the NWQL will begin analyzing samples for turbidity using a Hach 2100AN Nephelometer. The new nephelometer will replace the current Hach instrument on June 1, 2001. The Hach 2100AN uses improved technology to determine turbidity. It is more efficient and produces more accurate results in the presence of color than the present instrument.
On October 1, 2000, the NWQL will begin analyzing samples for turbidity using a Hach 2100AN Nephelometer. The new nephelometer will replace the current Hach instrument on June 1, 2001. The Hach 2100AN uses improved technology to determine turbidity. It is more efficient and produces more accurate results in the presence of color than the present instrument.
On October 1, 2000, the NWQL will begin analyzing samples for turbidity using a Hach 2100AN Nephelometer. The new nephelometer will replace the current Hach instrument on June 1, 2001. The Hach 2100AN uses improved technology to determine turbidity. It is more efficient and produces more accurate results in the presence of color than the present instrument.
On October 1, 2000, the NWQL will begin analyzing samples for turbidity using a Hach 2100AN Nephelometer. The new nephelometer will replace the current Hach instrument on June 1, 2001. The Hach 2100AN uses improved technology to determine turbidity. It is more efficient and produces more accurate results in the presence of color than the present instrument.