... and quantificational the alert level of all kinds gas alarm and gas detector Application: Portable Gas Calibration System JF-2215, designed to check the ... .05%, 0.30%, 0.50%, 0.80%, 1.00%, 1.25%, 1.50%.CO: 50ppm,100ppm,150ppm,200ppm,250ppm,300ppm, 500ppm ...