Welcome to CalibrationGas.com

Quality Calibration Gas. Competitive Pricing. Exceptional Service.

We offer a FREE notification service. All you need to do is email us your gas type, cylinder size, and the expiration date or the manufacturer's date. We will then send you an email when your gas is getting close to expiring.

We appreciate your visit and want to thank you in advance for considering doing business with us.

Our Calibration Gases meet and exceed the highest quality standards. We’ve priced our gases competitively to encourage you to order online. But our primary concern is to provide exceptional service.

We hope CalibrationGas.com will be a source of information as well as a source of supply. If all we can do for you today is answer a question, we’ve done our job. Please look us up again the next time you need to order Calibration Gas or anything related to Gas Detection Instruments. We also offer Onsite Calibration and Rental Services. Call 888.972.3389 for details.

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Is your Calibration Gas Expired?

Did you know that Calibration Gas expires? The additives used to stabilize the gases inside the cylinder dissipate over time and the accuracy of the gas cannot be guaranteed past the warranty period.

The cylinder you have now should be marked with either an Expiration Date or a Manufacturer Date. If your cylinder has a Mfg Date, use these general guidelines to determine when your calibration gas will expire:

  • LEL Mixtures and Non-Reactive Mixtures, 3 years
  • H2S, SO2, H2S-mixes, NO, NH3, ETO, and HCN Mixtures, 1 year
  • CL2 and HCL Mixtures, 8 mos.
  • NO2, SiH4 and Ph3, 6 mos.
  • Benzene, 1 year

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Safety First!

No matter what, safety should always come first. Keep in mind these safety precautions when working with calibration equipment.

  • Never refill cylinders. DOT 39 regulations state that these cylinders may not be refilled. In addition, cylinders with this rating may not contain toxic or poisonous gas. Consequently, our cylinders never contain toxic or poisonous gas and we fill very few flammable gas mixtures.
  • Always hold the gauge and regulator away from your face during engagement with the cylinder.
  • Always refer to the owner’s manual of your meter or instrument to determine the correct gas mixture for calibration.
  • When using these products the basic rules for handling compressed gases must be observed. Though small, the cylinders are under significant pressure.
  • Do not store cylinders with the regulator engaged in the valve. The regulator is not designed as the primary sealing mechanism. You can lose an entire cylinder to air in this manner.
  • Before attaching a regulator to the cylinder, ensure that the regulator is in the “on” position. Once the regulator is fully engaged in the cylinder, turn the regulator on/off knob to the “off” position until ready to sample. This procedure will help prevent air from being introduced into the cylinder and contaminating the reactive gas mixture.
  • Keep your sampling system short and use compatible materials. Teflon® tubing works well in the majority of applications.

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Proper Disposal

All cylinders are manufactured to DOT39 or DOT2Q regulations, which means they are not to be refilled. These regulations also prohibit filling with toxic substances. When empty, the cylinders present no hazard to health or the environment. The empty cylinders, regardless of the product they once contained, may be disposed of without special precautions. Most landfills will accept these cylinders for disposals.

As part of our continued commitment to our customers and the environment, we have initiated a recycling program. Our customers may return empty cylinders for recycling, or you may also purchase one of our recycling kits we have available and recycle them yourself. Either way, feel free to contact us with any questions you have.

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Let's Go Shopping!

Below are a few of the categories we carry solutions for in your calibration needs. If you have something specific you can not find or have any questions please feel free to contact us by email.

  • 4-in-1 Mixes– Quad Mixes or MultiGas mixes that include 02/LEL/CO and H2S or S02.
  • Reactive Gases– including Ammonia, Chlorine, Sulfur Dioxide, etc.
  • Non-Reactive Gases– including CO, CO2, Air and 02/LEL/CO mixes
  • Gas Generators– for gases that cannot be bottled such as Chlorine Dioxide.
  • Regulators/ Accessories– for all the other supplies you might need for instrument maintenance..

We can also provide the very small, disposable cylinders if you only maintain one instrument -OR- the large re-useable cylinders if you operate an instrument shop to maintain numerous instruments. Calibration Kits are no problem either. We will continually update CalibrationGas.com. If you cannot find the specific mixture of calibration gas that you need, simply send us a request for quote via email

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CalibrationGas.com is another value added service by All Safe Industries, Inc.