LNI Swissgas · Nel Hydrogen

Industrial on-site hydrogen generation

Eliminate cylinder deliveries, reduce operating costs, and ensure uninterrupted hydrogen supply with PEM electrolysis systems scaled from laboratory bench to full industrial production — 0.22 to 30 Nm³/h at pressures up to 435 psig.

Get a Quote → View Products ↓ Calculate Your H₂ Cost ↓

99.999%+H₂ Purity (to 99.99999% LNI)

4Product Families

0.22–30Nm³/h Flow Range

435psig Max Pressure

Choose Your Scale

Four product families — bench to plant

From compact air-cooled units for fuel cell testing to dual-enclosure systems producing 65 kg of hydrogen per day — there is a PEM electrolyzer for every industrial hydrogen requirement.

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LNI HG PRO M

High-flow laboratory PEM hydrogen generators on casters. 99.99999% purity with PSA/TSA drying. For CVD, Synthetic Diamond Manufacturing, and central lab supply.

8 models · 4–20 SLPM · up to 232 psi

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Nel S Series

Compact, air-cooled PEM generators for fuel cell testing, small-scale research, and tank filling. Single enclosure, fully automated.

3 models · 10–40 SCF/h · 200 psig

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Nel H Series

Mid-scale liquid-cooled PEM generators for industrial gas supply, process hydrogen, and larger fuel cell applications. H2 and H4 field-upgradeable to 6 Nm³/h.

3 models · 76–228 SCF/h · 218 psig

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Nel C Series

High-capacity dual-enclosure PEM systems for industrial production, float glass, metallurgy, and power-to-gas. Up to 65 kg/day.

3 models · 380–1140 SCF/h · 435 psig

LNI Swissgas · High-Flow Lab · Freestanding

HG PRO M Series — 4 to 20 SLPM

High-flow PEM hydrogen generators on casters for CVD, central laboratory supply, and GC carrier gas. 99.99999% purity with PSA or TSA drying. Pressure 174 psi (12 bar) standard, 232 psi (16 bar) optional. Parallel mode ready on board. Touch-screen LCD interface with RS-232/485, USB, and Digital I/O standard. Auto-refill from deionized water supply.

HG PRO 4M / 4M LN

4 SLPM

Purity>99.99999%
Pressure174 psi (12 bar); 232 psi (16 bar) optional
Dew Point−75°C / −80°C (LN)
Power1.92 kW
Size (W×H×D)45×66×66.5 cm
Weight60–61 kg (132–134 lb)

Compact freestanding unit for single-instrument GC carrier gas or small-scale CVD. LN variant achieves −80°C dew point with <1 ppm N₂ content.

HG PRO 8M / 8M LN

8 SLPM

Purity>99.99999%
Pressure174 psi (12 bar); 232 psi (16 bar) optional
Dew Point−75°C / −80°C (LN)
Power3.32 kW
Size (W×H×D)45×66×66.5 cm
Weight62–63 kg (137–139 lb)

Double-flow model for multi-instrument GC labs and mid-scale CVD processes. Same compact chassis as the 4M.

16M

HG PRO 16M / 16M LN

16 SLPM

Purity>99.99999%
Pressure174 psi (12 bar); 232 psi (16 bar) optional
Dew Point−75°C / −80°C (LN)
Power8 kW
Size (W×H×D)51×69×83 cm
Weight86–88 kg (190–194 lb)

High-flow model for central laboratory supply and large-scale CVD. Three-phase power standard (340–530 VAC Y; 196–305 VAC Δ optional). Larger chassis with castored wheels.

20M

HG PRO 20M / 20M LN

20 SLPM

Purity>99.99999%
Pressure174 psi (12 bar); 232 psi (16 bar) optional
Dew Point−75°C / −80°C (LN)
Power8 kW
Size (W×H×D)51×69×83 cm
Weight88–90 kg (194–198 lb)

Maximum capacity HG PRO M. 20 liters per minute of 99.99999% hydrogen for the most demanding central lab supply, industrial CVD, and hydride canister filling applications.

Standard vs LN variants

Standard models reach a −75°C atmospheric dew point. LN variants reach −80°C with nitrogen below 1 ppm (4M LN, 8M LN) or 3 ppm (16M LN, 20M LN) — important for gas sensing, fuel cells and CVD, where trace N₂ affects results.

Nel Hydrogen · Compact · Air-Cooled

S Series — 10 to 40 SCF/h

On-site PEM hydrogen generators in a compact, air-cooled, single-enclosure format. Tank filling mode with load-following operation that automatically adjusts output 0–100% to match demand. 99.999+% purity. Fully automated with push-button start/stop, fault detection, and remote communications via Modbus TCP/IP.

S10

0.27 Nm³/h · 10 SCF/h

Production0.58 kg/24h
Pressure13.8 barg (200 psig)
Purity99.999+%
Power3 kVA
CoolingAir-cooled
Size (W×D×H)79×97×112 cm
Weight209 kg (460 lbs)

Entry-level industrial electrolyzer for fuel cell testing, R&D labs, and small-scale tank filling applications.

S20

0.53 Nm³/h · 20 SCF/h

Production1.14 kg/24h
Pressure13.8 barg (200 psig)
Purity99.999+%
Power4.5 kVA
CoolingAir-cooled
Size (W×D×H)79×97×112 cm
Weight209 kg (460 lbs)

Double the capacity of the S10 in the same compact footprint. Ideal for medium-throughput fuel cell testing and industrial process hydrogen.

S40

1.05 Nm³/h · 40 SCF/h

Production2.27 kg/24h
Pressure13.8 barg (200 psig)
Purity99.999+%
Power8.5 kVA
CoolingAir-cooled
Size (W×D×H)79×97×112 cm
Weight209 kg (460 lbs)

Highest capacity air-cooled model. Supports continuous industrial processes while maintaining the same compact, single-enclosure design. Noise <70 dB(A).

Nel Hydrogen · Mid-Scale · Liquid-Cooled

H Series — 76 to 228 SCF/h

Integrated, automated, site-ready PEM hydrogen generators with liquid cooling for sustained high-output operation. H2 and H4 are field-upgradeable to H6 capacity (6 Nm³/h). Delivery pressure 15 barg (218 psig) standard, optional 30 barg (435 psig). Conforms to cTUVus, CE and ISO 22734. Built by Nel in Wallingford, Connecticut.

H2

2 Nm³/h · 76 SCF/h

Production4.31 kg/24h
Pressure15 barg (218 psig)
Purity99.999+%
Power22 kVA
CoolingLiquid-cooled
Size (W×D×H)180×81×191 cm
Weight682 kg (1,500 lbs)

Entry-point mid-scale system. Field upgradeable to H6 capacity (6 Nm³/h). Optional 30 barg high-pressure output. IP66 electrical compartment.

H4

4 Nm³/h · 152 SCF/h

Production8.63 kg/24h
Pressure15 barg (218 psig)
Purity99.999+%
Power38 kVA
CoolingLiquid-cooled
Size (W×D×H)180×81×191 cm
Weight727 kg (1,600 lbs)

Mid-capacity for continuous industrial hydrogen supply. Field upgradeable to H6. Modbus TCP/IP communications with 24 VDC dry contacts.

H6

6 Nm³/h · 228 SCF/h

Production12.94 kg/24h
Pressure15 barg (218 psig)
Purity99.999+%
Power55 kVA
CoolingLiquid-cooled
Size (W×D×H)180×81×191 cm
Weight773 kg (1,700 lbs)

Maximum H Series capacity. Nearly 13 kg of hydrogen per day from a single enclosure. Ideal for industrial process gas, power-to-gas pilots, and high-demand fuel cell operations.

Nel Hydrogen · High-Capacity · Dual Enclosure

C Series — 380 to 1,140 SCF/h

The highest-capacity models in Nel’s S, H and C on-site generator line. Two integrated, automated, site-ready enclosures (electrolyzer + power supply) deliver up to 65 kg of hydrogen per day at 30 barg (435 psig). Load-following operation. Conforms to TUVus, CE and ISO 22734. Built by Nel in Wallingford, Connecticut.

C10

10 Nm³/h · 380 SCF/h

Production21.6 kg/24h
Pressure30 barg (435 psig)
Purity99.999+%
Power85 kVA
Heat Load32 kW (9.1 tons)
Weight2,734 kg (6,026 lbs)

Entry-point high-capacity system. Two enclosures: electrolyzer (252×116×201 cm) and power supply (169×103×201 cm). IP44 rated.

C20

20 Nm³/h · 760 SCF/h

Production43.3 kg/24h
Pressure30 barg (435 psig)
Purity99.999+%
Power160 kVA
Heat Load64 kW (18.2 tons)
Weight2,924 kg (6,446 lbs)

Mid-range industrial capacity. Over 43 kg of hydrogen per day for float glass, metallurgy, chemical processing, and power-to-gas applications.

C30

30 Nm³/h · 1,140 SCF/h

Production65.0 kg/24h
Pressure30 barg (435 psig)
Purity99.999+%
Power236 kVA
Heat Load96 kW (27.3 tons)
Weight3,076 kg (6,781 lbs)

Maximum C Series capacity. 65 kg/day of 99.999+% hydrogen at 435 psig for large-scale industrial use, power-to-gas, and as feedstock for hydrogen fueling (with booster compression and high-pressure storage).

Delivered H₂ Cost Calculator

What does delivered hydrogen really cost you?

Enter what you pay today — gas, rental, and delivery charges. We’ll show your true cost per kilogram, the Nel electrolyzer sized to your demand, and what the same hydrogen costs in electricity on site.

How do you buy hydrogen today?

Cylinders used per month

Gas per cylinder (cu ft)

Price per cylinder

Cylinders on site (rented)

Rental per cylinder, per month

Delivery, hazmat & fuel surcharges, per month

All the line items besides gas and rental. Left at $0 in the example.

Your electricity rate (per kWh)

U.S. industrial average (EIA, July 2026). Texas averaged $0.071.

Example numbers — replace them with your own bill. Cylinder price ($58.05, industrial grade, 261 cu ft) and first-year rental rate ($0.27/day) from Penn State General Stores’ online price list (accessed October 2026). Tube-trailer price ($0.04/cu ft) is Red Ball Oxygen’s online list price for a hydrogen mini tube trailer, October 2026. Electricity rates are EIA averages for the industrial sector, July 2026 (preliminary). Electrolyzer power figures are system values from Nel Hydrogen’s S, H and C Series spec sheets (beginning of life).

Enter how much hydrogen you use, what you pay and your electricity rate, and your results will appear here.

Applications

Powering industrial hydrogen needs

From laboratory carrier gas to full-scale industrial production, on-site PEM electrolysis replaces cylinder deliveries with safe, reliable, on-demand hydrogen.

Fuel Cell Testing

Reliable, high-purity hydrogen supply for PEM fuel cell R&D, stack testing, and durability cycling. Automatic load-following matches variable demand profiles.

CVD & Thin Film

Ultra-high-purity hydrogen (99.99999%) as a process gas for chemical vapor deposition and thin-film manufacturing in semiconductor and materials science.

Central Lab Supply

Replace multiple cylinder racks with a single on-site generator. Piped hydrogen distribution to multiple GC, GC-MS, and analytical instruments across the lab.

Float Glass & Metallurgy

High-volume hydrogen for float glass manufacturing atmosphere control, metal heat treatment, annealing, and sintering processes.

Power-to-Gas

Convert surplus renewable electricity into hydrogen for energy storage, grid balancing, and green hydrogen production. Scalable from kW-class units to multi-unit installations.

GC & GC-MS Carrier Gas

On-demand, on-site hydrogen carrier gas eliminates cylinder changeouts, ensures consistent purity, and improves chromatographic performance.

Hydrogen Fueling

High-purity (99.999%+) hydrogen at up to 435 psig and up to 65 kg/day per unit, as feedstock for forklift fleets and small fueling stations. Dispensing adds a booster compressor, high-pressure storage and a dispenser.

Gas Sensing & Calibration

Ultra-pure reference gas for hydrogen sensors, gas analyzers, and calibration systems where consistent, specified purity matters.

Full Comparison

All industrial models at a glance

Side-by-side specifications across all four product families.

Model	Production	Pressure	Purity	Power	Cooling	Weight
HG PRO 4M	4 SLPM	174 psi (12 bar); 232 psi (16 bar) opt.	99.99999%	1.92 kW	—	60 kg (132 lb)
HG PRO 8M	8 SLPM	174 psi (12 bar); 232 psi (16 bar) opt.	99.99999%	3.32 kW	—	62 kg (137 lb)
HG PRO 16M	16 SLPM	174 psi (12 bar); 232 psi (16 bar) opt.	99.99999%	8 kW	—	86 kg (190 lb)
HG PRO 20M HIGH FLOW	20 SLPM	174 psi (12 bar); 232 psi (16 bar) opt.	99.99999%	8 kW	—	88 kg (194 lb)
Nel S10	0.27 Nm³/h	200 psig	99.999+%	3 kVA	Air	209 kg (460 lb)
Nel S20	0.53 Nm³/h	200 psig	99.999+%	4.5 kVA	Air	209 kg (460 lb)
Nel S40	1.05 Nm³/h	200 psig	99.999+%	8.5 kVA	Air	209 kg (460 lb)
Nel H2	2 Nm³/h	218 psig	99.999+%	22 kVA	Liquid	682 kg (1,500 lb)
Nel H4	4 Nm³/h	218 psig	99.999+%	38 kVA	Liquid	727 kg (1,600 lb)
Nel H6 H MAX	6 Nm³/h	218 psig	99.999+%	55 kVA	Liquid	773 kg (1,700 lb)
Nel C10	10 Nm³/h	435 psig	99.999+%	85 kVA	Liquid	2,734 kg (6,026 lb)
Nel C20	20 Nm³/h	435 psig	99.999+%	160 kVA	Liquid	2,924 kg (6,446 lb)
Nel C30 MAX CAP	30 Nm³/h	435 psig	99.999+%	236 kVA	Liquid	3,076 kg (6,781 lb)

Power: LNI figures are nominal power at maximum flow (kW); Nel figures are maximum power required over system life (kVA). HG PRO M weights are standard models; LN variants are 1–2 kg heavier. Specs per LNI Swissgas and Nel Hydrogen data sheets.

Common Questions

Industrial Hydrogen FAQs

What is industrial on-site hydrogen generation?

PEM electrolysis systems from Nel Hydrogen and LNI Swissgas produce hydrogen on demand for process and fueling applications — eliminating delivered gas.

What capacity and purity is available?

Systems scale from a few SLPM to 30 Nm3/h at 99.999%+ purity. We size to your process demand with room to grow.

Why on-site instead of delivered hydrogen?

On-site generation removes delivery costs and interruptions, reduces stored high-pressure gas, and gives you continuous supply matched to demand.

Do you install and service Nel systems outside the Gulf Coast?

Yes. SLI is based in League City, TX and services Nel Hydrogen electrolyzers nationwide — startup, commissioning, operator training, and preventive maintenance. LNI Swissgas generators are available across our 20-state LNI territory.

How accurate is the delivered hydrogen cost calculator?

It is only as accurate as the numbers you enter. It uses Nel’s published beginning-of-life power figures and your electricity rate, and it leaves out equipment, installation, maintenance, cooling, water treatment, and any compression. For a site-specific payback, send us your scenario.