Measuring instruments and devices for measuring chemical levels, in particular antigen levels, in water or water-based solutions for use in diagnostic sample testing, not for medical purposes; Sensors and detectors for measuring UV, fluorescence and chemiluminescence of diagnostic samples, not for medical use; Apparatuses for recording, transmission and reproduction of diagnostic data, sound and images, namely, cameras, microscopes, photometers, microplate readers in the nature of ELISA (enzy...