High-accuracy measurement services

VTT offers unique expertise in active hyperspectral sensing, a method that allows for hyperspectral sensing independent of lighting conditions. With the addition of the external broadband laser source, reflectance measurements can be performed at night, indoors, or in cloudy conditions. This also allows for remote material identification at large distance. We have demonstrated measurements up to one kilometre.

The active hyperspectral sensing technology is particularly suitable for applications where contact measurements are not possible and real-time data collection is required, such as mineral characterisation in the mining industry, material identification for circular economy applications (e.g. waste sorting), or safety and security applications. Related know-how include supercontinuum laser sources, MEMS-based spectrometers, interpretation of reflectance spectra, and multivariate data analysis.

VTT provides expertise in trace gas sensing with the development of advanced laser spectroscopy techniques, based for instance on cavity-enhanced spectroscopy methods. This expertise is applied particularly to the field of isotope detection of light molecules such CO2, methane or N2O. The use of optical techniques makes it possible to develop compact instrumentation, which can be used for on-line in situ measurements. Applications have been developed for different fields including emissions monitoring, monitoring of bio processes, and even breath analysis for disease detection.

VTT has also developed expertise in the detection of radioactive molecules such as radiocarbon and tritium, which can’t be detected on-line with conventional methods. We also work to extend the limit of the detection of the instrumentation, so that in the future, this method can also be used to differentiate between carbon of biogenic or fossil origin.

VTT has over 30 years of experience in advanced optical scientific and industrial dimensional precision metrology. We work with our customers to design and develop tailored solutions including:

• Measurements and tools for quality control of diffractive optical elements and waveguides
• Interferometers, diffractometers, and scatterometers for various dimensional metrology needs or industrial production
• Phase stepping interferometry for gauge block measurements e.g. upgrade of NPL-TESA gauge block interferometer

We have worked on solutions and applications for various industries, including metrology, photonics, and consumer devices.

We work on high voltage and electrical power metrology solutions and applications for various industries, including high-voltage testing, power transmission and test equipment manufacturers. VTT MIKES research infrastructure provides a unique RDI environment including high-voltage and high current laboratories.

• Design of custom instrumentation for high voltage and high current measurements
• Solutions available for measurements of DC, AC, and transient voltages down to nanosecond scale
• High voltage and current measurements up to 1000 kV and 8 kA

VTT MIKES has developed technologies for calibrating pressure sensors at dynamic conditions to improve accuracy of measurements. Traditionally dynamic pressure sensors are only calibrated at static conditions, which may lead to errors up to 10 %. With our solution, a calibration uncertainty level of 2 % level is achieved.

We offer:

• easy-to-use pressure calibrator for day-to-day use in industry
• primary standard for National Metrology Institutes (NMI) and high-end calibration laboratories where the best achievable accuracy is required

Improving accuracy of dynamic pressure measurements reduces fuel consumption and emissions in heavy duty vehicles, marine and engine power plants. Also, improvements in process control and safety are achieved in manufacturing, explosives and mechanical testing.