Turbidimeters are equipment that through optical analysis measure the turbidity of a liquid. That is, they are devices capable of measuring the size and concentration of particles in a suspension by diffusing light at 90 ° in a tube. It can be portable or fixed.

These instruments determine how cloudy a liquid is, in fact, they are considered the most widely used instrumental method today, among others for its ease of use, high precision and repeatability. Turbidimeters require no warm-up time and provide marked long-term performance without the need for lamp replacement.

At Kalstein we are a company specialized in the manufacture of laboratory equipment, including turbidimeters of the highest quality. Our turbidimeters are made up of a light source, a cell to contain the sample and a light detector (photocell).

The amount of light reflected for a specific particle density depends on the properties of the particles such as their shape, color and reflectivity. From an optical detector, with the light source at 90 degrees, the density of the particles will be a function of the light reflected by the particles suspended in the detector.

Turbidity, is a measure of the opacity or haze of a fluid, it was originally thought as a qualitative measure of the aesthetics of drinking water. It is not a measure of actual particles in the water; it actually measures how much those particles affect the light that is transmitted through the water, or how that light reflects off the particles in the water.

Factors Affecting Turbidity Measurement

• Size: the scattering of light is highly dependent on the relationship between the size of the particle and the wavelength of the incident light.
• Shape: Specifically that of large particles.
• Reflectivity: Since some particles can absorb light.
• Movement of the particles of organic and inorganic material and microorganisms that are suspended in the liquid.

What is the measurement range of a turbidimeter?

According to the light that the particles reflect towards the photoresist, its density is estimated. However, the amount of light reflected by a certain density of particles depends on several factors, including the color and shape of the particles. The turbidity unit used by turbidimeters is called the Nephelometric Turbidity Unit (NTU). The turbidimeter’s measurement range is 0 to 2000 NTU on the most advanced equipment, and it is typically sectioned into automatic ranges to increase accuracy.

Which turbidimeter should I choose?

Because every installation and every operation is different. And depending on your specific needs, there may be several options to consider. You must take into account several factors: portable solutions, coordination between process and laboratory measurements, requirement of greater precision in the recording and data transfer.

At Kalstein we are MANUFACTURERS and we offer you excellent turbidimeters with a wide measurement range, made with the highest technology and at the best PRICES on the market. So we invite you to take a look HERE.