We work tirelessly to produce the most accurate and stable calibration gas mixtures.
All our balances and gauges are NATA calibrated and mother cylinders are verified against fully traceable NATA certified reference materials.


Various cylinder sizes are available for purchase.
700L (5L WC) and 2800L (20L WC) gas capacity for large size regular gas mixtures
116L (1.7L WC) gas capacity for standard calibration gas mixtures
58L (0.85L WC) and 34L (0.85L WC) gas capacity for small size regular gas mixtures
69L (1L WC) gas capacity for flammable gas mixtures
Our used cylinders recycle program is an environmentally-friendly way to reduce waste caused by empty cylinders.
We will collect all your empty Clear Gas cylinders for recycling free of charge in Melbourne or you could send back empty Clear Gas cylinders to us for further recycling.
You can purchase cylinders recycling tool from our shop if you decide to recycle at your site.

The list below is not exhaustive. Mixtures containing higher or lower concentrations may be available upon request.
Non Reactive Gases | Formula | Range |
---|---|---|
Carbon Monoxide | CO | 5ppm-100% |
Carbon Dioxide | CO2 | 5ppm-100% |
Ethanol | C2H5OH | 70ppm-300ppm |
Methane | CH4 | 5ppm-100% |
Nitrogen (5.0) | N2 | 10ppm-100% |
Oxygen | O2 | 200ppm-23.5% |
Propane | C3H8 | 10ppm-10% |
Hydrogen | H2 | 100ppm-100% |
Refrigerant R-134A | CF3CH2F | 100ppm-0.2% |
Sulfur Hexafluoride | SF6 | 10ppm-2% |
Refrigerant R32 | HFC | 1000ppm-6.35% |
iso-Butylene | iso-C4H8 | 10ppm-1% |
Hexane | C6H14 | 50ppm-4000ppm |
Pentane | C5H12 | 10ppm-0.75% |
Benzene | C6H6 | 5ppm-150ppm |
iso-Butane | iso-C4H10 | 5ppm-10% |
Non Reactive Gases on Demand | Formula | Range |
---|---|---|
Ethylene | CH2 | 10ppm-2.5% |
Toluene | C7H8 | 10ppm-200ppm |
Acetylene | C2H2 | 100ppm-1.25% |
n-Butane | n-C4H10 | 10ppm-8% |
Nitrous Oxide | N2O | 30ppm-2000ppm |
Hellium | He | 99.99% |
Reactive Gases | Formula | Range |
---|---|---|
Hydrogen Sulphide | H2S | 10ppm-250ppm |
Nitric Oxide | NO | 10ppm-250ppm |
Hydrogen Cyanide | HCN | 10ppm-2% |
Nitrogen Dioxide | NO2 | 5ppm-100ppm |
Sulphur Dioxide | SO2 | 5ppm-250ppm |
Ammonia | NH3 | 10ppm-500ppm |
Chlorine | CL2 | 0.25ppm-100ppm |
Hydrogen Chloride | HCL | 10ppm-25ppm |
Reactive Gases on Demand | Formula | Range |
---|---|---|
Phosphine | PH3 | 0.5ppm-5ppm |
Ethylene Oxide | C2H4O | 5ppm-10ppm |