Army CO2/O2 Concentration Monitor (Model I)
HARRY DIAMOND LABS ADELPHI MD ADELPHI United States
Pagination or Media Count:
A flueric-electronic system has been developed to continuously monitor the concentration of carbon dioxide and periodically measure the concentration of oxygen in respiratory gases. The sensor consists of two miniature flueric oscillators whose acoustic frequency depends on CO2 concentration the sensor is coupled to a pressure transducer. The signal is electronically processed, and the gas concentration is indicated by a calibrated dial. The signal may also be recorded. The system has a low sampling rate 7 ccsec induced by a flueric suction unit operated by low-pressure gas. The humidity and temperature of the sampled gas are controlled by a humidity control unit operated by a flueric vortex tube. The system has been calibrated and is accurate to better than 0.3 percent carbon dioxide and 1 percent oxygen.