Crowcon Calibration Gas 60L 1ppm PH3 in N2 is a must-have for gas detector maintenance. This special mix helps keep Crowcon devices that measure phosphine (PH3) working correctly. The 60-liter tank holds exactly 1 part per million of PH3 in nitrogen. As a result, technicians can easily check and adjust their equipment for top performance. Moreover, regular use of this gas ensures detectors stay accurate and reliable over time. Therefore, it’s a key tool for workplace safety in industries where PH3 exposure is a risk.