Crowcon’s Calibration Gas 60L 50ppm NH3 in Air is a must-have for safety teams. This product helps keep ammonia detectors accurate and reliable. The 60-liter cylinder contains a precise mix of 50 parts per million ammonia in air. Moreover, it’s easy to use for regular calibration and bump testing. As a result, workplaces can maintain their safety standards with confidence. However, always handle this gas with care and follow proper safety protocols.