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NTU - What is Turbidity?

Turbidity is the measurement of light scatter and is typically reported as NTU nephlometric turbidity units. NTU refers to the 90° angle of measurement used for water quality measurement for drinking water applications. Turbidity measurement is also commonly used for final effluent monitoring to infer suspended solids concentrations affecting water quality. Different types of turbidity instrumentation are available for drinking water and final effluent monitoring.

The microtol is typically installed for flow through measurement of drinking water quality. Primetime (non-harzardous) primary calibration standard, are available for multiple point calibration including a 0.02 NTU set point. Additionally the ProCheck-S solid state validation standard provides a rapid performance test to determine when a complete primary calibration is needed.

The Visoturb sensor is a robust submersible probe that incorporates continuous ultrasonic cleaning, 90° light scatter measurement combined with a backscatter technique used for diagnostics and the very best optical measurement window. Whilst primarily designed for waste water monitoring, digital range selection allows detection from 0.01 NTU and selection of five measurement scales to 4,000 NTU.

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MIQ-TC2020XT multi-parameter controller
HF Scientific on-line turbidimeter drinking water quality measurement instrumentMicrotol turbidimeters for
drinking water monitoring
WTW Visoturb IQ Sensor Net final effluent monitoring turbidity sensor
VisoTurb turbidity
HF Turbidity calibration standard for on-line turbimeter drinking water quality instrument
ProCheck-S calibration standard for
validating HF microtol turbidimeters