Qualification of Image-Based Measurement Systems for Characterization of Sprays

Image-based measurement techniques become increasingly popular and expedite digitalization in chemical engineering. This article demonstrates their potential by testing two inline probes, namely modified optical multimode online probe (OMOP) and process microscope. Validations are performed with static monodisperse standards (9.2 mu m to 406 mu m) and fast-moving droplets (68.6 mu m to 860.7 mu m; 24.5 m s(-1) to 11 m s(-1)). Screening of a lithography attests both probes great distortion-free image quality. A 1951 USAF chart attests a low optical resolution of 8 mu m or 7 mu m with respect to the OMOP or process microscope, respectively. The modified OMOP and process microscope reaches accuracies of 7.6 % or 5.9 % for particles and 8.2 % or 6.8 % for droplets.