Measurements using optical spectroscopy are becoming increasingly important in analytics as a non-destructive method in the laboratory and in process. The focus is on the following aspects:
Optical probes are usually installed in production processes to monitor reaction progress or for quality control. Some of these probes are connected to a spectrometer via very long optical fibers.
Compared to laboratory measurement, this setup has the advantage of real-time measurement directly at the "point of interest", but the drawback of a complex, locally decentralized system.
Potential for improvement
The smart sensor for optical spectroscopy addresses the improvement potentials described above by combining an optical process probe, a spectrometer and the evaluation unit in one compact housing. The sensor is used directly at the point-of-interest, i.e. at the exact point in the process flow where the measurement should be performed. The optical signal of the measurement is converted in the sensor into a digital signal and interpreted. Compared to a normal optical probe, the sensor thus not only provides an optical signal, but a real spectrum. This opens up more extensive and efficient possibilities for solving process analytical tasks in real time with high measurement rates.
Spectroscopy sensors form the technology basis for Hellma's new business unit, which goes beyond classic analytical components such as optical probes and measurement cells to offer partially/fully integrated solutions. Sensors are available for optical measurements in the near-infrared (NIR) and mid-infrared (MIR) ranges.
The degree of integration of a solution can vary and is adapted to application requirements or the customer needs. From the combination of individual standard components to a coordinated system, up to a completely individual spectroscopy solution, including hardware, software and chemometrics.