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Egas depot is a calibration gas supplier for Hydrogen sulfide (H2S) calibration gas, Methane (CH4) calibration gas, Carbon monoxide (CO) calibration gas and many more. We offer hundreds of calibration gas mixtures found in two categories and from single gas mixtures to 4 gas mixtures and even 6 gas mixtures.If you have a gas mixture that contains at least one reactive gas, simply select the Reactive category below. We offer gas cylinder sizes from 11 liters to 850 liters as well as free shipping. For further savings we offer a 20% discount on all refills. If you cant locate your gas or we don't offer it, just call and we can create the mixture and ad it to our online catalog for you. We have over 10,000 products available online. Call (833)386-9248 for a live sales agent.