CAPNOSCOPE ASSEMBLY, AND A METHOD IN RELATION TO THE CAPNOSCOPE ASSEMBLY

A capnoscope assembly for measuring carbon dioxide (CO2) concentration, and an associated method. The assembly includes a detection unit, an indicator holder, a processing unit, and a calibration member. The processing unit adjusts light parameters such that a camera detects a predetermined calibration colour. A colorimetric indicator is arranged to be used in the indicator holder. The colour of the colorimetric indicator surface is measured when illuminated by emitted light being generated by using determined calibrated control signal values, when no CO2 is present. The measured colour is stored as a zero CO2 colour value. A CO2 concentration relationship is determined based upon the measured zero CO2 colour value. The processing unit applies the CO2 concentration relationship during CO2 concentration measurements provided that the determined calibrated control signal values are applied when emitting light.