PEM Electrolyzer - S Series

  • Nel Hydrogen S Series Gas Generators

Nel PEM Electorlyzers

Nel S10, S20, and S40 hydrogen generators utilize a Proton Exchange Membrane (PEM) to produce up to 99.9995% pure hydrogen gas from water. The S Series PEM electrolyzers are used for on-site hydrogen production, providing a safe, convenient, and cost-effective alternative to using high pressure cylinders of H2.
S Series units are efficiently designed and use load-following technology to sense demand and adjust production accordingly. S Series generators can produce the equivalent of three 6-pack cylinders per week of better than UHP-grade hydrogen 99.9995% every day. 

S Series Spec Sheet


Utilizing PEM technology to produce ultra-high purity hydrogen on-site, S Series hydrogen generators replace the need for multiple cylinders, while providing space-saving solutions that effectively maintain quiet operation. Some of the features include:
  • Autofill water level control
  • Automatic leak detection
  • Water purity monitor
  • Purge airflow monitoring system ensures safe operation
  • Compact size and quiet operation
  • Automatic production control
  • Load-following technology senses demand and adjusts production rate
  • Low maintenance with maintenance reminders
  • Touchscreen interface
  • Compatible with multiple units

Specifications for S Series Hydrogen Electorlyzers

S Series models provide an environmentally friendly alternative to standard gas cylinders that must be continuously refilled and provide inconsistent gas qualities. With that in mind, the specifications for S Series models include the following rates and outputs (with a maximum flow 18.8 SLPM at 13.8 barg / 200 psig). 

Download our pdf for a full list of the S Series specifications.

Flow Rate (splm)
Nominal Production Rate
0.27 Nm3/h
10 SCF/h
0.58 kg/24 h
0.53 Nm3/h
20 SCF/h
1.14 kg/24 h
1.05 Nm3/h
40 SCF/h
2.27 kg/24 h
Purity (concentration of impurties)
99.9995% [H2O < 5 ppm, -65o C (-85o F) Dew Point, N2 < 2 ppm, O2 < 1 ppm,
all other undetectable]
Delivery Pressure - Nominal 
13.8 barg / 200 psig


S Series PEM electrolyzers can be used for numerous types of applications where the production of hydrogen gas is necessary for the overall proper operational qualities within a facility. Some of the direct applications associated with on-site hydrogen production, include:
  • Material processing
  • Chemical processing
  • Meteorology
  • Gas chromatography
  • Semiconductor
  • Leak detection
  • Power plant
  • LFL

Advanced Safety Concepts for PEM Electrolyzers 

PEM hydrogen generators are specifically manufactured with cutting-edge safety standards that are designed to protect users with continuous internal and external leak checks and auto-shutdown features. Additional safety features, include: 
  • Complete diagnostic checks on start-up.
  • Continuous pressure-based leak check during operation.
  • Automatic shutdown by isolation of the H2 generation cell
  • Audio and visual alarms
  • Forced ventilation throughout the generator
  • Low hydrogen gas throughout the system (< 0.3 L max.)
  • Load following operation automatically adjusts output to match demand

Additional Services 

SilPac does more than just manufacture gas systems. We also offer a complete list of services to support your gas distribution equipment. We provide on-site system startup, function testing, training, and field service and support.

Related Products

Check out our full line of PEM electrolyzers, including the: 

Contact Us Today for Nel PEM Electrolyzers

Our success is measured by customer satisfaction, and our dedication to quality objectives drives continual improvement in all aspects of our business. 
Contact us or request a quote today and let us find the best solution to satisfy your needs and expectations.