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A semiautomatic nondispersive infrared analyzer apparatus has been developed for analysis of up to 50 CO 2 air samples per day. The samples are collected in 500‐ml glass flasks and are transferred to the analyzer with a novel, free‐floating piston pump. Sample and calibration gas transfer operations are controlled by a microprocessor, and data are recorded, analyzed, and output by a Hewlett‐Packard 9845A/S desktop computer. The apparatus is described, including operating and test modes, and performance characteristics determined from 2 years of operation are given.
Komhyr et al. (Sun,) studied this question.
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