The thickness of a product - be it film, paper or nonwoven - has a direct influence on its quality. In the case of packaging material, for example, parameters such as air permeability and tear resistance must be exactly right. Otherwise it cannot fulfil its task of protecting products from external influences and guaranteeing their integrity. However, this can only be achieved if the material thickness is exactly as specified - and this for each individual production margin.
While homogeneous, reliable and functional products are a necessity for the quality standards required by customers, they have another advantage. High quality goods that exactly meet the specifications reduce production costs. You save raw material and energy by measuring and controlling the web thickness of the material.
Thickness measurement of fabric webs
Web thickness measurement
Our thickness measurement solutions guarantee our customers high quality goods while increasing the efficiency of the production process. The traversing quality measuring system Qualiscan QMS records the desired parameters and provides real-time feedback on the values. Thus, defects can be corrected immediately. Depending on the application and condition of the product, we provide the appropriate sensors.
Sensors for thickness measurement
Optoscope WLI
Measurement of thickness / layer thickness
White light interference
White light from the upper and lower boundary surfaces of thin films is reflected differently. Interference measurement allows for the precise measuring of transparent coatings on films and mono-films. Both, the layer thickness and film thickness can be determined with a special measuring process.
Product Highlights
- Simple and rapid measurement method
- Measures coating thickness and film thickness
- High accuracy and durability
Customer benefits
- Quick process optimization
- Material savings
- Quality assurance
When white light is reflected from thin layers, this reflection appears colorful like a rainbow. This effect can be observed for example in a thin film of oil on a puddle of water. The light is reflected at both the upper and lower boundary of the part. The superimposed reflections interfere. The interference is related to the layer thickness and can be detected by a spectrometer.
Specification | Value | Unit | |
---|---|---|---|
Type | WLI-R-UV-WIS | WLI-R-NIR | |
Spectral range | 330 - 1200 | 940 - 1700 | nm |
Measuring range | 0,2 - 250 | 1 - 130 | µm |