CO2 sensor of 5,000 yen or less, majority is inferior.Dentsu University Warning -PC Watch

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　As part of the new colon virus infection prevention, it is effective to avoid ventilation closed space and density of people, so it is attracting attention to measuring/visualization of carbon dioxide (CO2) concentration as a guide for ventilation.。Therefore, the CO2 sensor is one of the hottest products.Under such circumstances, the research group of the National University Corporation Corporation has purchased 12 inexpensive CO2 sensors for less than 5,000 yen or less on the market on the 10th, compiling and reporting the results.

　実験では、大手ECサイトで購入したCO2センサー12台(価格帯は2,900～4,999円)と、T&D製の研究用センサーとCHCシステム製の産業用センサーを同時に利用。アクリル水槽にこれらのセンサーを封入し、水槽内部のCO2濃度を変化させて測定した。

　As a result, 25%of the total sensors responded to CO2, despite low accuracy, but 67%did not respond, but all of these non -reactioned sensors were strongly reacted to disinfecting alcohol.In other words, it turned out that the majority of the cheap sensor is a poor product that cannot accurately measure the CO2 concentration.

　These sensors display under small values or conversely overestimate them, so when used for infectious diseases, "underestimated ventilation cannot be ventilated at the timing of ventilation", and "over -evaluated repetition."Users say that there is a danger such as ignoring the display or indicating interest (wolf juvenile effect).

　The research group proposes the following three methods that anyone can simply confirm whether the purchased sensor can measure the CO2 concentration correctly.