Major Safety has been in the business of providing quality gas detection and safety equipment for over 30 years. We are committed to providing you with knowledgeable sales and service of quality equipment ranging from reflective vests and earplugs to engineered fall protection systems and various calibration gas mixtures. Included among our calibration gas offerings is hydrogen calibration gas that can be used to calibrate various explosive meters and gas monitors. Various densities of our hydrogen calibration gas are available in 17 liter quantities. When you talk to us you can be assured that we never consider it a bother to meet your needs, so feel free to contact us TOLL FREE at 800-446-8274 or email sales@majorsafety.com to discuss how much hydrogen calibration gas you require!