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The term particle measurement includes the detection of smallest particles in gases, liquids, powders or on surfaces. These include dust and other air pollutants, nanoparticles such as carbon black or pigments, but also viruses or bacteria.
Depending on the particles to be detected and the medium to be analysed, different measuring methods can be used. These provide both qualitative and quantitative information.
Types of particle measurement
The most important measurement principles can be distinguished as the following two:
- Laser diffraction or light scattering: diffraction and scattering of laser light by particles, for small particles in gases and liquids.
- Microscopic methods with optical image analysis: optical image acquisition with high magnification for automated particle counting for emulsions, suspensions and powders.
Other measurement principles are based on the following methods:
- Absorbance measurement
- Sieve analysis
- Sound attenuation methods
- Electrical methods
MedSolut.com is currently focussing on particle measurement devices, which are primarily based on the first two methods of light scattering and optical image analysis. These two measurement principles are state of the art and cover a wide range of measurement possibilities.
Functionality of various particle measuring instruments
Measurement according to the principle of light scattering
With the light scattering principle, the measuring chamber is located between a laser light source and a detector. The sample is irradiated with laser light, the light is partially deflected by the particles and collected on the detector. There, ring-shaped intensity patterns are created, each of which can be characteristically assigned to a particle size.
Measurement according to the principle of optical image analysis
With this measuring principle, dry samples as well as wet samples can be analysed reliably. In both cases, the sample to be analysed is transported through a measuring chamber positioned between an LED light source on one side and a camera on the other. While the sample passes through the measuring chamber, high-resolution images are continuously recorded, which can then be evaluated by suitable analysis software.
Particle measuring device for suspensions and powders
At MedSolut.com you can purchase particle analysers from Fritsch, which are based on the principle of optical image analysis or light scattering. For emulsions, suspensions and pow ders the measuring principle of optical image analysis is particularly suitable. For liquid suspensions and emulsions with particularly small particles, light scattering is the optimal solution.
Areas of application
In optical image analysis, particles from 20 m to 20 mm are detected by the particle measuring instrument. In addition to the number of particles, the size and shape can also be determined. This is particularly useful in quality analysis, production control and research. This method is also a fast alternative to sieve analysis.
Light scattering measurements detect particle boundaries in the range of 0.01 m up to 3.8 mm. This is particularly relevant in quality control of production processes and in research and development.
Optical image analysis measurement systems are characterised by a high-quality camera that can produce a large number of images in a short time. A sophisticated analysis algorithm and an extensive database make it possible to present a meaningful result in less than five minutes.
The measuring systems based on light scattering are characterised by short measuring times, particularly high measuring accuracy and reliable reproducibility. With only one laser, a specially optimised measuring cell and one detector, no further optical elements are necessary – the system is practically maintenance-free.
Order particle sizer at MedSolut.com our service offer
Are you looking for an innovative particle measuring device? Then we are your competent partner. With our excellent advice and personal, individual service, we ensure that you find the optimal individual solution for your workplace. In detail we offer:
Direct comparison and individual prices
MedSolut.com allows you to directly compare numerous brand manufacturers and their different products all on one platform. So you always have a good overview. In addition, MedSolut.com offers you the best possible prices. If you find the products cheaper elsewhere, we will adjust the price for you individually.
Competent and comprehensive advice
MedSolut.com sets its own high standards for the quality of our products and our service. That’s why all our experts have many years of experience, are happy to advise you on your product selection, take time for you and help you at any time.
Online availability and worldwide delivery
All our products are available online, allowing you to select and order at your convenience. Your particle sizer will then be delivered to your desired location as quickly as possible and on time, worldwide and without complications.
Your satisfaction is the focus of MedSolut.com. Our service staff is always there for you if you need technical support, have questions or requests.
Our range of particle analysers
Our range of particle measuring instruments includes high-quality measuring systems from FRITSCH. The company is one of the world’s leading manufacturers of application-oriented laboratory instruments. The following products are part of the MedSolut.com portfolio.
FRITSCH ANALYSETTE 22 NanoTec
This measuring instrument based on light scattering technology is based on the reverse Fourier construction invented and patented by FRITSCH. The compact design with few components allows a fast acquisition of all relevant scattering data. Due to the innovative arrangement of the measuring cell and laser, particularly high scattering angles can also be detected, which is a relevant difference for particles in the nanoscale.
State-of-the-art electronics allow the entire measuring range to be recorded with a single image and simultaneously transmitted to the software. This makes the measurement particularly fast.
FRITSCH ANALYSETTE 28 ImageSizer
The heart of the Analysette 28 ImageSizer, a particle sizer based on optical image analysis, is the state-of-the-art camera. The industrial camera with 5 megapixels covers an extremely wide detection range. Even small particles become visible. Bi-telecentric lenses guarantee that comparable particle shapes are recorded at every position in the measuring chamber and that no optical distortions occur.
The particularly strong stroboscopic LED illumination ensures homogeneous illumination of the image area. With a direct USB connection, extremely fast data transfer is possible. In combination with innovative software and an extensive database, the results are quickly available.
Selection criteria for the right particle sizer
In order to find the right instrument for your requirements, the following criteria are relevant as a first guide.
Nature of the material to be analysed
Since not all measuring principles are suitable for all samples, it is important to consider beforehand which substances are to be analysed. Powdery samples, suspensions and emulsions can be analysed using optical image analysis such as the FRITSCH Analysette 28 ImageSizer. Light scattering is more suitable for liquid samples with finely distributed particles.
Another question is which analytical limits are relevant. Particle size and number of particles are output by most particle sizers. If the particle shape is also relevant, this is currently only possible using optical methods.
Another criterion is the size of the particles to be analysed. Both measuring principles cover the range between 20 m and 2 mm. If smaller particles up to 0.01 m are to be detected, light scattering is advantageous. For larger particles up to 20 mm, optical image analysis is the best choice.
It is also important to consider the speed at which the measurement results must be available. This is important, for example, if online or inline analysis is being considered. Light scattering allows almost in-situ analysis. Optical image processing is somewhat slower due to the data transfer of images, here the results are available in a few minutes.
Particle measurement for your application – we will be happy to advise you!
Would you like to introduce innovative technologies in your laboratories or in quality control and invest in a particle measuring instrument? Our trained specialists will advise you personally and answer all your questions. This way, we ensure that you purchase the instrument that best suits your application and requirements. You can reach us by phone at +49 30 209 657 900 or via e-mail at [email protected]