Drager 58L Sulphur Dioxide Calibration Gas is a key tool for gas safety. It has 10ppm of SO2 in nitrogen. This mix helps check SO2 detectors accurately. The gas works with many devices, including Drager stations. It’s easy to carry and use in the field. Also, it’s NIST-traceable for top quality. Therefore, it’s great for both lab and on-site testing.