Time Air - online utility on ToolBox.
SCBA usable air usable = V·(P−P_alarm)/P_atm (V in L, P in MPa, P_atm=0.101325 MPa); consumption = breathing rate × tidal volume; service time t = usable/consumption; safe time = 0.75·t.
根據正壓式空氣呼吸器氣瓶容積、壓力與使用者勞動強度,估算可用使用時間與安全作業時間,為火場內攻與救援作業提供安全保障參考。