Yajima Watch

November 16, 2021 06:00

　The Ministry of Economy, Trade and Industry has released a guideline on the website that guides how to select a carbon dioxide concentration measuring instrument.

　Although it is a carbon dioxide concentration measuring instrument that has become attractive as a tool that can easily confirm that the ventilation of the room is sufficiently performed, not all products have sufficient performance, but are inexpensive sensors. The majority of the Telecommunications University announced the survey results, saying that the majority could not be accurate measurements. The guidelines published by the Ministry of Economy, Trade and Industry this time have listed two minimum requirements, which is the "optical formula" and "function for correction" as a minimum required requirements. It is a helpful information for users who have never used a carbon concentration measuring instrument to select a product. By the way, in the release of the above -mentioned telecommunications university, as a way to check whether the purchased sensor is working correctly, the hand that refers to around 400 ppm in the outdoor air or the alcohol sprayed with disinfecting. It has published guidelines such as whether the value does not rise sometimes, and by using these together, it seems to be useful for choosing a used carbon dioxide concentration measuring instrument.