… apparatus for measuring or checking electrical quantities, excluding meters of heading 90.28; instruments and apparatus for measuring or … alpha, beta, gamma, X-ray, cosmic or other ionising radiations. …
Explanatory notes
… example, cross‑talk meters, gain measuring instruments, distortion factor meters, psophometers) - … instruments incorporating ionisation chambers . A potential difference is set up between two electrodes contained in the … into analogue signals for the purpose of making medical diagnoses (e.g., gamma camera, scintillation scanner) ( …