Calibration Gas Mixtures in High Pressure Refillable Cylinders
Many gases and liquids can be mixed Gravimetrically to ISO 6142 to give plus or minus 2% accuracy , which is referred to as a Certified Standard or plus or minus 1% accuracy which is referred to as a Primary Standard. A large percentage of calibration gases used in industry are “Certified Standards” but “Primary Standards “ are used for ultra accurate applications.
The following can be mixed together in steel cylinders;
Component List Reactive Components List
N- Pentane
Iso – Pentane
N-Hexane
N-Heptane
Octane
Nonane.
Argon
Nitrogen
Helium
Carbon Dioxide
Carbon Monoxide
Air , Hydrogen
Nitrous Oxide
Oxygen, Methane
Ethane
Acetylene
Ethylene
Propane
Propylene
N-Butane
Iso Butane
Iso – Butylene
Reactive gases such as:
Hydrogen Sulphide ,
Carbonyl Sulphide
Carbon Disulphide
and a wide range of Thiols ( Mercaptans )
Sulphur Dioxide,
Nitric Oxide ,
Nitrogen Dioxide
Ammonia
Chlorine of must be contained in an aluminium cylinder for best stability.
There are many more potential mixture components and these can be quoted on request.
Cylinder Sizes
For ease we will deal with the most common two cylinder sizes50lt water capacity (shoulder high ), and 10 lt water capacity ( knee high ) , see following information;
Cylinder size
Material
Length (mm)
Diameter (mm)
Full Wt (Kg)
Gas (litres)
Order Code
Price £
50ST
Steel
1650mm
230mm
90Kg
7500Lt
50ST
£200
Cylinder size
Material
Length (mm)
Diameter (mm)
Full Wt (Kg)
Gas (litres)
Order Code
Price £
10ST
Steel
950mm
140mm
17Kg
1500Lt
10ST
£120
Cylinder size
Material
Length (mm)
Diameter (mm)
Full Wt (Kg)
Gas (litres)
Order Code
Price £
50AL
Aluminium
1650mm
250mm
70Kg
7500Lt
50AL
£750
Cylinder size
Material
Length (mm)
Diameter (mm)
Full Wt (Kg)
Gas (litres)
Order Code
Price £
10AL
Aluminium
780mm
170mm
15Kg
1500Lt
10AL
£250
