红外线气体分析仪，是利用红外线进行气体分析。它基于待分析组分的浓度不同，吸收的辐射能不同．剩下的辐射能使得检测器里的温度升高不同，动片薄膜两边所受的压力不同，从而产生一个电容检测器的电信号。这样，就可间接测量出待分析组分的浓度。
探讨了3501红外分析仪在实际使用中出现负值的原因。
The working principles of 3501 infrared analyzer and its applications in ethylene plant are described.
同时，使用EWS近红外分析仪，用漫反射技术，对单籽粒稻谷和单籽粒稻谷糙米的品质特性进行分析。
Furthermore, near infrared reflectance spectroscopy was used in qualities analysis of single rice and single rice brown, using the EWS Analyzer.
利用红外气体分析仪测定甘薯叶片发育和衰老过程中光合特性的变化。
The photosynthetic characteristics during development and senescence of sweet potato leaves were measured by using PQW infrared gas analyzer.
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