SENSOR INSTRUMENT FOR MEASURING GAS COMPONENT

摘要

PURPOSE: To obtain a sensor for measuring gas component in which highly efficient thermal conduction is ensured with no optical loss by inserting a cuvette such that a predetermined window provided at the holding part touches the cuvette tightly and disposing a heater at a predetermined position. CONSTITUTION: A cuvette holding part 11 is provided with a window 14 for transmitting a measuring light beam into the optical path and the window 14 touches a cuvette 12 tightly when it is mounted. A heater 15 is disposed on the opposite side to the window surfacing the cuvette 12 such that the optical path passes through the heater 15. Since the heater 15 heats only the required surface of the window 14, highly efficient heat conduction is ensured in a cuvette area where the light passes. Measuring signal and reference signal received by a measuring unit 7 and a reference detector 8 are delivered to an analytical evaluation unit where the quotient of both signals is determined and a standardized signal is generated. That signal is a measure of CO2 contained in the cuvette 12.