PEAK Scientific Instruments manufacture a dedicated gas generator for supplying calibration gas to instruments where better than instrument grade air is required, such as CO2 analysers. The generator will provide up to 15 L/min ATP of dry pure air with all impurities less than 0.1 ppm

The generator can be connected to an existing in house air supply or provided with an integral air compressor ready for connection to power and the instrument. The Calibration Gas Generator combines a catalytic converter (used for producing Zero Air) and a CO2 removal system. This ensures the purist, driest air is constantly available.

The Calibration Gas Generator gas purities are:

	CO <1 ppm		THC <0.1 ppm
	CO2 <1 ppm		O2 18 ­ 20%
	NOX <0.1 ppm		H2O <1.53 ppm
	SOX <0.1 ppm

Ultra Zero Air is conveniently produced by the Calibration Gas Generator from your existing in house air supply at pressures up to 125 psi g. Gas is generated by both catalytic oxidation and a proprietary regenerative sieve. Coalescing pre-filters and a final filter ensure continuous gas purity.

How it works. Compressed air from the compressor goes through a pre-filtration process where it under goes particulate removal (0.01 micron) and bulk moisture removal (by a coalescing element), before being passed to a compressed air dryer/purifier.

The compressed air dryer/purifier works on the principle of Pressure Swing Adsorption (PSA). The gases and moisture are selectively adsorbed from the compressed air into a porous crystalline sieve material.

The air is feed at pressure into one of the columns and the outlet air from this column is split into two paths. Part of the air is directed to the outlet of the purifier for storage in the reservoir tank and the other part is ' blown' back down the other unused column (open to atmosphere) to purge out the adsorbed impurities.

The purified air from the compressed air dryer/purifier is passed through a non- return valve and is stored in an internal reservoir. The air is then passed through both a pressure regulator and a flow regulator before being passed into a heated chamber containing a platinum catalyst. This chamber is kept at a temperature of 400 o C as this is the required energy level to 'crack' the carbon-hydrogen bonds. The free carbon and hydrogen atoms then combine with any oxygen that is present in the air forming carbon dioxide and water.

The generator is compact and easy to install and offers sufficient outlet flow rate to service the needs of multiple instruments. If clean, dry, consistent ultra zero air is required for your laboratory, the Calibration Gas Generator offers the cost effective solution to instrument air.

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