CO2 refrigeration
CO2 (R744) is a natural, low cost refrigerant and has far less global warming potential than HFCs. For these reasons, it has become more widely used in the refrigeration industry within the past few years. Carbon dioxide must be monitored in places where potential leaks could occur. High CO2 levels are a potential health risk for people.
Vaisala CARBOCAP® 産業空調向けCO2変換器GMT220シリーズ
産業用から農業用まで幅広い環境でCO2計測が行なえます。PPMからパーセンテージレベルまでの範囲で10種類の選択が可能。ハウジングはIP65(NEMA4)適合。
- GMT221 in Cold Storage Applications(42.33 KB)
Effects of carbon dioxide on people
|
CO2 Concentrations |
Effects |
|
10,000 ppm (1%) |
Breathing rate increases slightly |
|
30,000 ppm (3%) |
Breathing increases to twice normal rate, and a person would experience impaired hearing, headache, and increased blood pressure. |
|
50,000 ppm (5%) |
Breathing increases to approximately four times normal rate, symptoms of intoxication become evident and slight choking may be felt. |
|
75,000 ppm (7.5%) |
A sharp odor is noticeable. At this level a person would experience very labored breathing, headache, visual impairment, and ringing in the ears. Judgment may be impaired, followed within minutes by loss of consciousness. |
|
>100,000 ppm (10%) |
Unconsciousness occurs rapidly above 10% level. Prolonged exposure to high concentrations could eventually result in death from asphyxiation. |
OSHA permissible exposure limits
|
5,000 ppm (0.5%), |
8 hour period: Time Weighted Average (TWA) |
|
30,000 ppm (3%) |
< 15 minutes: Short-Term Exposure Limit (STEL) |
|
50,000 ppm (5%) |
>5 minutes: Imminent Danger to Life and Health (IDLH) |
Guidelines only, refer to published documents.
- Safety first in CO2 production(185.18 KB)
