KIMWOOD carbon dioxide concentration meter. Prices on Amazon are as fluid as carbon dioxide in a room, around 6,000-8,000 yen. The measurement range is 400ppm to 5,000ppm. Equipped with thermometer and hygrometer
Sometimes I want a machine that quantifies the invisible. In the past, I bought a laser rangefinder with nowhere to use it, and during the corona crisis, I bought a pulse oximeter to measure blood oxygen saturation, and ten years ago, I bought a radiation dosimeter after the nuclear accident.
And this time it's a carbon dioxide concentration meter. It is an item that sells because the importance of ventilation has increased due to the corona wreck. How do we measure invisible carbon dioxide (CO2)? The current mainstream is the NDIR method, which uses a sensor to measure the amount of infrared light after passing infrared light through the air and quantify the concentration of carbon dioxide. Carbon dioxide has the property of absorbing wavelengths in the infrared region.
I don't usually care about carbon dioxide concentration, so it's interesting just to see it in real time. The average concentration of carbon dioxide in the atmosphere is around 400ppm. This concentration rises year by year and is considered to be the cause of global warming, but it is almost impossible to see a figure of 400ppm indoors in urban areas. Even in a room that is usually ventilated with the windows slightly open, the values fluctuate between the latter half of 400ppm and 900ppm. When the window is closed, it exceeds 1,000ppm. Indoors, 1,000ppm is one standard, and ventilation is recommended if this is exceeded (purchased products emit a beeping alarm when 1,000ppm is exceeded).
The carbon footprint of human breathing cannot be discounted. It seems that there is also a calculation that human breathing accounts for nearly 10% of the world's carbon dioxide emissions. If you blow on the carbon dioxide concentration meter as a test, it will exceed 2,000ppm at once.
Built-in 2,000mAh rechargeable battery (terminal is micro USB). It also has a hole for hanging and a foldable stand.This might be my imagination, but I tend to get higher numbers when I'm focused on work. Is your brain consuming oxygen in the same way that a computer CPU heats up as it does a lot of calculations? In the future, I think there will be more opportunities to be conscious of carbon dioxide concentration for the purpose of improving productivity, as well as checking the ventilation status as a countermeasure against corona. It will soon be possible to have the function built into a smartwatch.
By the way, I finished the second vaccination of the new coronavirus vaccine two days ago, but the side effects were diarrhea and a slight fever in the low 37°C range. I would like to see numerical values to see how much antibody is completed in the body. Will there ever come a world where we can see the other person's immunity, like Scouter in Dragon Ball?