Carbon dioxide concentration measuring instruments, which are used as a guide to check the ventilation status, are increasingly used mainly in restaurants, etc., but industry groups made by manufacturers, etc. use appropriate measuring instruments with sufficient functions. I am calling to use it.
Since the carbon dioxide concentration measuring device measures the carbon dioxide concentration around the installation site, it has the advantage of being able to "visualize" the ventilation status.
As a measure to prevent rebound by the government subcommittee, in the proposal compiled in February this year, restaurants were requested to use it, and Osaka Prefecture, where "priority measures such as spread prevention" are applied, is also restaurants, etc. I am requesting the installation.
For this reason, some companies are running out of stock due to a series of inquiries and orders from companies that manufacture and sell measuring instruments.
Under these circumstances, the Industrial Gas Detection and Alarm Industry Association, which is made by manufacturers that manufacture and sell measuring instruments, is calling attention to the fact that if the measuring instruments are selected and used incorrectly, sufficient effects may not be obtained.
Points to note when purchasing
The industry association says that there are some products on the Internet that cannot accurately measure the concentration of carbon dioxide, and wants you to check the functionality when purchasing.
It is preferable to use an "NDIR sensor" that measures using infrared rays, the upper limit of the measurement range is at least 1500ppm or 2000ppm, and the "indication accuracy" that indicates the measurement error is preferably 5% or less. I will.
On top of that, as a way to check whether it is functioning properly, it is also effective to take the measuring instrument outdoors and check if the carbon dioxide concentration is about 420 to 430 ppm.
Precautions when using
In addition, it is necessary to pay attention to the installation location in order to properly grasp the ventilation status.
The height should be close to the height of the person's mouth, and it is important to thoroughly investigate places with poor ventilation and places where people are likely to be crowded before installing.
Mr. Kimitoshi Carpenter, Chairman of the Industrial Gas Detection and Alarm Industry Association, said, "I want you to check the effect of ventilation using a measuring instrument and create a mechanism to circulate air in places where ventilation is not good." ..