Background

General Information


There is hardly a physical phenomenon applied in analysis technology as widely as the interaction of electromagnetic radiation with matter. The advantages of applying this phenomenon are manifested in continuous, non-contact and non-destructive measurements in product analysis and quality control.


Definitions


Many properties of absorbing components can be detected by selecting different spectral ranges and suitable wavelengths.

Our analysis systems can be used for many applications. They can be adapted to various environmental conditions. The optics are based on tempax, quarz glass, or sapphire, which makes them robust and low on maintenance. Measurements in reactors can be performed with the help of optical fibres.

Measurement principles

Transmission (types TMK-550 or 480-CT)
Transmission measurements are the method of choice to probe liquids and gases. The beam of light passes through a flow cell of defined thickness that is filled with the liquid or gas sample. The transmitted light contains the spectral information about the sample composition. In addition, the sample temperature (and in the case of gases, also the gas pressure) can be detected and used for mathematical compensation of the measured data.
Advantage: Exactly defined conditions; high energy efficiency.

Diffuse Reflection (types RMK-10 or RMK-24)
This method is commonly used to probe powder samples or other solids, such as paper, sheet metal, granulates, or gels. Near-infrared (NIR) radiation penetrates into the sample and is refracted and reflected by its atoms and molecules. The reflected light contains the spectral information about the sample composition.
Advantage: Chemical and physical information without sample preparation.

Transflection (type RMK-9T)
Our special foil measurement system combines transmission and reflection to measure PVB moisture: NIR radiation penetrates the foil, is reflected by a mirror and penetrates the foil again.
Advantage: Increased sensitivity due to the doubled optical path.