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OVERVIEW
Thank you for purchasing Apera Instruments TN400 Portable Turbidity Meter (hereafter referred to as
the instrument).
The instrument uses infrared light emitting diode (LED 860±30nm) as the light source and 90°
scattering method, which is compliant with ISO 7027 and DIN EN 27027 standards for the
determination of turbidity for water solutions. TN400 allows you to measure the turbidity of an aqueous
sample both in laboratory and in the field.
The instrument is an outstanding combination of the most advanced electronic technology and software
design. With built-in microprocessor chips, elegant design, easy to use, the meter has the following
remarkable characteristics:
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Smart functions, such as automatic calibration, operating instructions, automatic power-off, low
voltage display, etc.
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Large TFT color screen, with blue background in measuring mode, green background in calibration
mode, and text and graphics in operational directive.
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Operation guidance and reminders in the process of calibration, measurement and parameter setting.
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Average measurement mode automatically takes 10 times consecutive readings, calculate and
display the average. It improves the accuracy of the measurement, especially suitable for sample
solutions with rapid settling and continuous measurement changes.
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The instrument meets IP67 water-resistant grade and is suitable for use in harsh environments.
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Everything comes in a rugged carrying case, including accessories such as calibration solutions, test
vials, and more, convenient for use and carry.
