Industrial Hydrogen Generators | Nel & LNI

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. Field upgradeable.

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 up to 232 psi* optional (16 bar). 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.

4M

HG PRO 4M / 4M LN

4 SLPM

Purity>99.99999%
Pressureup to 174 psi / 232 psi* optional (12–16 bar)
Dew Point−75°C / −80°C (LN)
Power1.4 kW (1.8 kW)
Size (W×H×D)45×66×66.5 cm
Weight55–56 kg

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.

8M

HG PRO 8M / 8M LN

8 SLPM

Purity>99.99999%
Pressureup to 174 psi / 232 psi* optional (12–16 bar)
Dew Point−75°C / −80°C (LN)
Power2.8 kW (3.5 kW)
Size (W×H×D)45×66×66.5 cm
Weight57–58 kg

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%
Pressureup to 174 psi / 232 psi* optional (12–16 bar)
Dew Point−75°C / −80°C (LN)
Power5.6 kW (6.5 kW)
Size (W×H×D)51×69×83 cm
Weight73–74 kg

High-flow model for central laboratory supply and large-scale CVD. Three-phase power option available. Larger chassis with castored wheels.

20M

HG PRO 20M / 20M LN

20 SLPM

Purity>99.99999%
Pressureup to 174 psi / 232 psi* optional (12–16 bar)
Dew Point−75°C / −80°C (LN)
Power7 kW (7.9 kW)
Size (W×H×D)51×69×83 cm
Weight77–78 kg

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 use PSA (Pressure Swing Adsorption) drying achieving −75°C dew point. LN variants add TSA (Thermal Swing Adsorption) for −80°C dew point and nitrogen content below 1–3 ppm — critical for applications like gas sensing and fuel cells where trace N₂ affects performance.

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. Field upgradeable from H2 to H6 capacity. Delivery pressure 15 barg (218 psig) standard, optional 30 barg (435 psig). cTUVus, CE, and ISO 22734 certified. Made in USA.

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 largest PEM electrolyzers in Nel’s portfolio. 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. TUVus certified, CE marked, ISO 22734 compliant. Made in USA.

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 capacity PEM electrolyzer. 65 kg/day of 99.999% hydrogen at 435 psig. For large-scale industrial, power-to-gas, and hydrogen fueling station applications.

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 to MW.

GC & GC-MS Carrier Gas

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

Hydrogen Fueling

On-site generation at 435 psig for hydrogen vehicle fueling stations, forklift fleet refueling, and mobility applications.

Gas Sensing & Calibration

Ultra-pure reference gas for hydrogen sensors, gas analyzers, and calibration systems requiring traceable purity with documented specifications.

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	up to 174 / 232* psi (12–16 bar)	99.99999%	1.4 kW	—	55 kg
HG PRO 8M	8 SLPM	up to 174 / 232* psi (12–16 bar)	99.99999%	2.8 kW	—	57 kg
HG PRO 16M	16 SLPM	up to 174 / 232* psi (12–16 bar)	99.99999%	5.6 kW	—	73 kg
HG PRO 20M HIGH FLOW	20 SLPM	up to 174 / 232* psi (12–16 bar)	99.99999%	7 kW	—	77 kg
Nel S10	0.27 Nm³/h	200 psig	99.999+%	3 kVA	Air	460 lbs
Nel S20	0.53 Nm³/h	200 psig	99.999+%	4.5 kVA	Air	460 lbs
Nel S40	1.05 Nm³/h	200 psig	99.999+%	8.5 kVA	Air	460 lbs
Nel H2	2 Nm³/h	218 psig	99.999+%	22 kVA	Liquid	1,500 lbs
Nel H4	4 Nm³/h	218 psig	99.999+%	38 kVA	Liquid	1,600 lbs
Nel H6 UPGRADE	6 Nm³/h	218 psig	99.999+%	55 kVA	Liquid	1,700 lbs
Nel C10	10 Nm³/h	435 psig	99.999+%	85 kVA	Liquid	6,026 lbs
Nel C20	20 Nm³/h	435 psig	99.999+%	160 kVA	Liquid	6,446 lbs
Nel C30 MAX CAP	30 Nm³/h	435 psig	99.999+%	236 kVA	Liquid	6,781 lbs

Industrial on-site hydrogen generation