The general concept of a non-dispersed optical infrared CO2 sensor is developed in this work. Its feature is simplicity, cheapness, and miniaturizes. An analysis of the modern component base is carried out with the selection of the necessary elements, such as an infrared emitter and a sensitive element. The performance characteristics of the sensor are considered based on a datasheet of an analog infrared photodiode AK9710ADF01. The sensor is built on the basis of a mid-IR quantum photodiode. An optical bandpass filter is used. The normal operating temperature range is from -40◦ to 90◦ . The element has a built-in optical filter designed for a wavelength of 4280 nm. For the interaction of the sensitive element with the microcontroller, it is applied a signal amplification scheme, based on OPAMP AK2920. The life time of photoinduced electrons, at which the device operates in BLIP mode, is determined. On the basis of these data, it is concluded that modern technologies for the production of photodiodes based on indium antimonide InSb provide the possibility of operation in the BLIP mode, while the speed of operation is acceptable for the operation of the photodiode as a gas sensor.
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