Nitrogen Generators
Cylinder deliveries, rental charges and handling risk make bought in nitrogen an expensive habit for any facility using it daily. Nitrogen generators produce gas on site from compressed air, using membrane or pressure swing adsorption technology to reach purities from 95 percent up to 99.999 percent for demanding analytical work. Payback against cylinder supply commonly arrives within a few years of steady use. Machinery Masters lists nitrogen generators from verified sellers, covering new and used systems, with direct owner contact and finance available on qualifying listings.
Show Filters
3
Live Listings
2
Trusted Brands
100%
Verified Sellers
24/7
Global Marketplace
Nitrogen Generator Product Types
Generator choice turns on required purity, flow and how the gas will be used. The main system types listed here are outlined below.
Membrane nitrogen generators
Hollow fibre membranes separate nitrogen continuously with no moving parts in the separation stage. They suit blanketing, purging and duties where 95 to 99 percent purity is enough.
PSA nitrogen generators
Pressure swing adsorption systems using carbon molecular sieve reach purities to 99.999 percent. Twin tower cycles deliver a continuous flow of high purity gas for analytical and process use.
Bench top instrument generators
Compact units feed LCMS, evaporators and specific instruments directly at the bench. Sized to the instrument, they remove cylinder logistics from the lab entirely.
Skid mounted generator systems
Complete packages combine compressor, dryer, generator and buffer vessels on one frame. Single point installation suits facilities without existing compressed air capacity.
High flow industrial generators
Large PSA plants supply packaging lines, tank blanketing and process duties at high volume. Oxygen analyzers with purity alarms document the gas quality delivered.
Latest Nitrogen Generators Listings
Why Choose Machinery Masters
Verified Sellers Only
Every seller is verified before a single listing goes live. Machinery Masters also reviews listings for accuracy, so buyers can commit to high value machinery with confidence.
Global Reach
Listings come from sellers across Europe, North America, and beyond. That reach widens the options past any regional dealer network, and it is often the only way to find discontinued models in good condition.
Flexible Financing Options
Qualifying listings carry financing through partner providers. Terms are shown directly on eligible product pages, spreading the cost instead of draining working capital in one hit.
Direct Seller Contact
No broker sits between the buyer and the seller. Ask about service history, arrange inspections, and negotiate directly with the person who actually knows the machine.
Applications and Uses
On site nitrogen serves a surprisingly broad set of scientific and production duties. These four applications account for most generator demand.
LCMS and analytical instruments
Mass spectrometers consume nitrogen continuously as nebuliser and drying gas. A dedicated generator ends the cylinder changes that interrupt long sequences.
Sample evaporation and concentration
Blowdown evaporators use streams of nitrogen to concentrate samples ahead of analysis. Steady on site supply supports high throughput sample preparation.
Pharmaceutical blanketing and purging
Nitrogen blankets protect oxygen sensitive products in vessels and during transfer. Generated gas with purity monitoring provides the documented supply GMP requires.
Food and packaging operations
Modified atmosphere packing lines flush packs with nitrogen to extend shelf life. On site generation scales supply with line speed at predictable cost.
Benefits from Machinery Masters
On site nitrogen sells itself on arithmetic, and the marketplace improves the numbers.
Membrane and PSA systems at every purity
Bench instrument units through facility scale nitrogen generators list in one category within utilities, power and facility systems. Purity and flow specifications sit on each listing.
Capital cut, payback pulled forward
A serviced used generator slashes the outlay that dominates the cylinder versus generation sum. New systems list alongside where warranty support carries the decision.
Purity figures from real service, not brochures
Owners can share the actual purity, flow and air demand their unit achieved. Financing on qualifying listings lets the gas savings meet the repayments.
Frequently Asked Questions About Nitrogen Generators
Blanketing, purging and fire prevention duties commonly run at 95 to 99 percent, LCMS instruments typically want around 99.5 percent, and GC carrier or demanding process work pushes to 99.999 percent. Higher purity costs disproportionately more air and energy, so specify what the application needs rather than the best available. Check your instrument manuals, since over specifying purity is the most common and expensive sizing error.
Expect roughly two to four times the nitrogen output in feed air at moderate purity, rising steeply at high purity, so a generator is really a compressed air project in disguise. Confirm your existing compressor has genuine spare capacity or budget for a dedicated one. Feed air must also be dry and oil free to protect membranes and sieve material, which means dryers and filtration belong in the plan.
Membrane systems need little beyond feed air filter changes, though membranes lose capacity if oil or water reaches them. PSA systems add valve service and, over many years, carbon molecular sieve replacement, with oxygen analyzer calibration on monitored systems. When viewing used generators, ask specifically about feed air quality history, since poisoned sieve or membranes is the fault that matters.
Yes, and you should verify it rather than accept it, since sieve and membrane condition determine achievable purity regardless of age. Ask the seller to run the system and demonstrate purity on a calibrated oxygen analyzer at your required flow. A generator holding specification under witnessed test is a sound purchase, and one that cannot is a source of parts.
Frequently, because the cylinder spend the generator eliminates is a known monthly figure that repayments can sit below from the first month. Where a listing on Machinery Masters qualifies, finance is arranged through the platform while you agree price and delivery directly with the seller. Many buyers reach positive cash flow on the switch immediately by structuring it this way.