Portable and Laboratory Turbidity Meters for clear and coloured liquids. The term „turbidity” is used to describe the cloudiness or milkiness of water. In physical terms, turbidity is due to particles of varying sizes scattering or absorbing light, giving the water in question a cloudy appearance. This turbidity is caused by suspended particles such as sludge, limestone, yeast or microorganisms.
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TB 210 IRThe compact infrared turbidity meter TB 210 IR is designed to allow fast, precise on-site testing. |
Turbidity Measurement
The phenomenon of turbidity is measured using optoelectronic meters. An artificial light source emits a known intensity of light through a sample. The suspended particles scatter or absorb the light. The scattered light is then recorded on a photodetector.
Scattered light is generally measured at an angle of 90°. This measurement principle is known as nephelometry. The results are expressed in terms of FNU (Formazin Nephelometric Units) – identical with NTU (Nephelometric Turbidity Units).