Which kind of filter is used in improved version of infrared gas analyzer at the output end?
A. Low pass filter
B. High pass filter
C. Narrow bandpass filter
D. Wide bandpass filter
Answer:C
Which kind of filter is used in improved version of infrared gas analyzer at the output end?
A. Low pass filter B. High pass filter C. Narrow bandpass filter D. Wide bandpass filter
Explanation: The filter is used in improved version of infrared gas analyzer at the output end is narrow bandpass filter. The bandpass characteristics are matched with the absorption spectra of the gas of interest.