Nitrogen Generator from Domnick Hunter
- Designed to meet specific analytical instrument gas purity and flow requirements
- Improved analytical performance - Production of a constant flow of gas improves the consistency of the analysis results and hence reproducibility
- Increased laboratory efficiency with a constant, guaranteed supply
- Improved safety - No handling high-pressure gas cylinders or liquid dewars. Nitrogen production at controlled low pressures
- Simple installation - Only one set up operation required for reliable service over time. Installation on or below a laboratory bench top, saving space in the laboratory
- Economy - Quick return on investment - No gas cylinder rental bottles, no price inflation
- Recommended by major instrument manufacturers
- Combined N2 and Dry Air Generators - In addition to the stand alone nitrogen, zero N2 and dry air gas generators, domnick hunter also manufactures models that provide nitrogen and dry air from a single unit (models G6 and G7).
Principle: passage of compressed air through a bed of carbon molecular sieve (CMS) using presure swing adsorption technology, the most reliable on the
- N2 flow: 550 cc/min to 30L/min (for larger capacities please consult domnick hunter)
- O2 purity: 3% to 10 ppm
- On-line purity monitoring capability
- Digital hours counter Audible and visual maintenance indicator
- Economy mode option: Enables the compressor to switch off when nitrogen supply is not required
- Oil-free air compressor available: The quietest models available
- Available with or without built-in air compressor
- Quick and easy servicing: less than 10 minutes every 6 months
- A 25L/min version is also available
How the generator works
The technology used to produce a continuous flow of high purity N2 is pressure swing adsorption (PSA).
This technology uses a combination of molecular sieves to selectively eliminate O2 and other contaminants in the ambient air. The CMS column(s) alternate between the purification and regeneration modes to ensure continuous N2 production. The gas generator is designed to take pre-filtered compressed
air at 7 or 8.5 barg (102 or 123 psi g) (depending on model) from the existing laboratory supply or via the integrated oil-free compressor.
This flow of filtered compressed air then passes through the CMS column which is in the purification mode. At this point, the O2, CO2, humidity and hydrocarbons are eliminated from the compressed air, producing a flow of clean and dry high purity nitrogen. For zero N2 generators, a heated catalyst oxidises additional hydrocarbons from the N2 gas flow providing zero grade N2 with a remaining hydrocarbon content of <0.1ppm