Turbidimeter or turbidity meter. How should it be used?

April 29, 2022by Kalstein
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A turbidimeter is a device that allows evaluating how cloudy a liquid is, that is, it determines the turbidity. It does this through an optical analysis that allows it to measure the particles in suspension in a dissolved gas or in a liquid. For which it uses a light source and a light detector (a photocell) set at right angles to the original beam.

Turbidity is the measure of the opacity or cloudiness of a fluid. It is considered an essential analysis to determine the quality of the water, because it is caused by particles of different sizes and that generate an opaque appearance in the sample, and it will be greater when there is a greater proportion of undissolved solids in the liquid. Although it is important to note that turbidity is a measure of the opacity of a liquid, it is not a measure of actual particles.

How is a turbidimeter used?

Turbidity can be estimated with equipment such as a spectrophotometer and a colorimeter, which can measure the decrease in transmitted light due to the blockage generated by the particles. However, these measurements are not considered valid by the international regulatory bodies because they do not conform to the accepted definition of turbidity, they propose the use of the turbidimeter at all times.

A turbidimeter is built for field or laboratory measurements, as well as 24/7 monitoring by setting an alarm that triggers when unsafe turbidity levels are reached. The configuration of the turbidimeter is an essential element to obtain good performance in turbidity measurements. The turbidity unit used by turbidimeters is the NTU (nephelometric turbidity unit), and they generally have a measurement range that goes from 0 to 2000 NTU in the most sophisticated equipment. The latest technology for turbidity measurement uses a laser to measure light scattering at 90ยฐ and 360ยฐ around the sample, offering high optical precision, with fast results and greater equipment reliability.

How does a turbidimeter work?

A turbidimeter measures suspended particles with a light beam (beam source) and a light detector set at 90ยฐ to the original beam. The density of the particles is a function of the light reflected by the particles suspended in the detector. The amount of light reflected for a given particle density depends on particle properties such as shape, color, and reflectivity.

The turbidimeter reveals the rate or ratio of light intensities, it measures both the transmission of light intensity and its dispersion. This is of vital importance for liquids with intense colors and for highly turbid samples.

What do we offer you at Kalstein?

At Kalstein we are MANUFACTURERS of the highest quality laboratory equipment and we offer you excellent turbidimeters with a wide measurement range, made with the highest technology and at the best PRICES on the market. In this opportunity we present you Portable Turbidity Meter YR01841, this equipment is a high performance portable turbidity meter, calibration from 2 to 5 points, 4 selectable turbidity units. The meter is suitable for process control and field use.

Among its characteristics we find:

  • High performance portable turbidity meter meets design criteria in ISO 7027.
  • 2 to 5 point calibration using formazin standards.
  • 4 selectable turbidity units including NTU, FNU, EBC and ASBC.
  • Single measurement mode automatically detects and locks in a stable reading.
  • Continuous measurement mode can be used for indexing or matching sample vials.

That’s why we invite you to take a look HERE

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