What is calibration gas?

You use calibration gas for calibrating gas monitors and bump testing monitors to ensure the sensors provide an accurate reading.

Most jurisdictions require you to bump test your gas monitors daily if using them to test a confined space. When calibrating gas monitors, the gas concentrations of the cylinder must match the programmed settings of the gas monitor. It is also important that the regulator gives the correct flow rate for the gas flow.

For monitors with integral pumps and for docking systems, it’s necessary to use a demand flow regulator. For some types of corrosive gases, you need to use special regulators that are resistant to the corrosive effects of the gas.

Gases that come in steel cylinders:

These common gases usually come in steel cylinders and the concentrations are usually warranted for three years:

  • Methane
  • Propane
  • Isobutylene
  • Carbon Dioxide (CO2), and
  • Various O2/N2 mixes

Gas that come in aluminum cylinders:

Hydrogen Sulphide (H2S) comes in an aluminum cylinder and is good for two years.

Other common mixes that also come in aluminum cylinders with warranties that may be less than one year include:

  • Sulfur Dioxide (SO2)
  • Nitrogen Dioxide (NO2), and
  • Chlorine (Cl2)

Levitt quad gas calibration cylinder 100ppm CO/25 ppm H2S/18% O2/2.5% CH4

Our best-selling calibration gas mixes:

Levitt-Safety offers a wide variety of calibration gas for bump testing and calibrating gas monitors.

Below is a list of our best sellers, you can browse our full offering using our ‘Calibration Gas Guide.

Fill out the form on this page if you don’t see the gas you’re looking for. We can provide pricing and most of our gases come in 34-litre cylinders and 58-litre cylinders.


Levitt-Safety CO, H2S, O2, LEL Pentane

  • 100 ppm CO, 25 ppm H2S, 25% LEL Pentane, 18% O2
  • Available in 34L (part number IFLA1073753) and 58L (part number IFLA0967361) cylinders
  • For use with Industrial Scientific (ISC) monitors

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Levitt-Safety CO, H2S, O2, CH4, LEL Methane

  • 100ppm CO, 25 ppm H2S, 18% O2, 2.5% CH4, 50% LEL Methane
  • Available in 34L (part number IFLA0431536) and 58L (part number IFLA0446460) cylinders
  • For use with all BW/GfG Standard 4-Gas monitors, BW/GfG docking station

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air liquide fixed flow regulator

Air Liquide Fixed Flow Regulator, 58 & 103L Cylinders

  • Gas regulator
  • Flow rate 0.25 lpm
  • For use with 58L and 103L cylinders

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air liquide fixed flow regulator

Air Liquide Fixed Flow Regulator, 58 & 103L Cylinders

  • Gas regulator
  • Flow rate 0.5 lpm
  • For use with 58L and 103L cylinders

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Looking for something else?

Our team is here to help with your calibration gas needs including product advice, quotes or training.

If you need help choosing the right calibration gas for your instrument, we can help.

Fill out the form on this page and a member of our team will contact you!

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