APPARATUS FOR DETECTING CO2 CONCENTRATION IN CULTURE BOX

摘要

PURPOSE:To measure the accurate concn. value of CO2, by a method wherein the gas to be measured in a culture chamber set to temp. higher than circumferential one and held to high humidity is guided to the outside of a culture box to be passed through a heat exchanger performing the heat-exchanging with the circumferential temp. and subsequently detecting the temp. of the gas to be measured and the concn. of CO2. CONSTITUTION:CO2 is supplied to the culture chamber 3 of a culture box 1 from a CO2 bomb 9 through a solenoid valve 10 and a transport pipe 11. The culture chamber 3 is heated by a heater 6 to be held to constant temp. (e.g., +37 deg.C) and held to high humidity corresponding to relative humidity of 95-98%. CO2 in the culture chamber 3 is passed through a heat exchanger 13 by an air pump 21 through a lead-out pipe 14 and cooled to circumferential temp. to be adjusted to relative humidity of 100%. The temp. of CO2 is detected by a temp. detector 19 and the concn. of CO2 is detected by a CO2 detector 18 to calculate the concn. of CO2 in gas to be measured.