Hydrogen duty
Define the required flow, operating hours and whether the unit will run continuously, intermittently or in trials.
COMPACT PEM HYDROGEN PRODUCTION · 0.5–1 Nm³/h
0.5–1 Nm³/h Compact PEM Electrolyzer — HELE S-Series
A compact PEM electrolyzer system for laboratories, R&D facilities, pilot hydrogen projects and small on-site hydrogen applications requiring configurable purity, pressure, controls and project documentation.
Hydrogen Output
0.5–1.0 Nm³/h
Hydrogen Purity
Up to 99.999%*
Pressure Capability
Up to 3.0 MPaG*
Operating Load Range
20–120%
* According to the selected model and gas-treatment configuration.
Compact Hydrogen Production Without a Large Skid Footprint
The S-Series is positioned as HELE’s compact PEM electrolyzer range for low-flow hydrogen production. It combines the PEM electrolysis core with the required water, power, gas-handling, control and protection functions according to the selected project configuration.
1
PEM Stack
Core hydrogen generation module using PEM electrolysis technology.
2
DC Power Supply
Provides stable rectified DC power for efficient stack operation.
3
DI Water Management
Controls DI water quality and circulation for reliable performance.
4
Gas-Liquid Separation
Separates moisture and improves hydrogen purity before outlet.
5
Dryer
Further purification configuration available for demanding testing.
6
PLC Control
Monitors operating data and supports automated system control.
Configuration review
Four Decisions to Settle Before Ordering
The required hydrogen duty, delivery condition, site interfaces and acceptance method should be described on the same quotation basis.
Hydrogen delivery
State the point-of-use purity, pressure and whether drying, buffering or downstream equipment is in scope.
Site utilities
Confirm available electrical supply, feed-water specification, cooling method and permitted installation space.
Release evidence
Agree the operating-condition basis, safety interfaces, test records and manuals needed for acceptance.
Technical Specifications
Key reference data for a typical S-Series Compact PEM Electrolyzer configuration.
| Parameter | Specification |
|---|---|
| Hydrogen Production Rate | 0.5–1.0 Nm³/h |
| Oxygen Production Rate | 0.25–0.5 Nm³/h |
| Hydrogen Purity | Up to 99.999%, depending on drying / purification configuration |
| Maximum Allowable Pressure | Up to 3.0 MPaG, model dependent |
| Feed Water | Deionized water |
| Water Conductivity | ≤0.1 μS/cm |
| Operating Load Range | 20–120% |
| Hot / Cold Start | 0.5 / 5 min reference values |
| Dynamic Response | ≥15%/s reference value |
| AC Power Supply | Project-specific |
| System Dimensions | Configuration-dependent compact cabinet layout |
Engineering Note: Startup time, dynamic response, pressure capability, hydrogen purity and other performance values should be confirmed against the selected model, operating conditions and approved acceptance specification.
Utilities & Project Interfaces
Site preparation checklist for safe installation and efficient operation.
Ventilation
Confirm the installation area has adequate hydrogen equipment ventilation and is suitable for operation.
Ambient Temperature
Confirm the operating environment ambient temperature is maintained between 5°C to 50°C.
Humidity
Confirm relative humidity is ≤85% and excessive condensation is avoided in the room.
Equipment Placement
Confirm the unit can be installed upright on a stable, level base free from severe vibration.
Grounding & Clearance
Ensure proper equipment grounding and at least 1 meter of maintenance clearance around the unit.
DI Water & Drainage
Dedicated DI water supply and a safe drainage point must be accessible.
Controls & Safety
Built-in protection logic designed for indoor laboratory and pilot testing facilities.
Hydrogen Leak Detection
Concentration monitoring and alarm logic support safer operation.
Emergency Stop
System-wide interlock protection helps protect personnel and equipment.
Pressure & Temp
Multi-point monitoring supports stable operation and auto-response.
Conductivity Protection
Abnormal water conductivity triggers alarm or protective response.
Separator Level
Liquid level monitoring supports reliable gas-water separation.
Remote Interface
Signal interface available for laboratory or pilot integration.
Applications & Use Cases
The S-Series is most suitable for small-scale hydrogen generation projects where compact structure, controlled output, and simple integration are required.
Laboratory Testing
Small hydrogen supply for laboratory testing, research, and controlled experimental use.
Education Platforms
Teaching, demonstration, renewable hydrogen education, and electrolysis training.
R&D and Pilot Testing
Early-stage system validation, component testing, and pilot-scale hydrogen production.
Stack Research
Research projects involving PEM technology, water electrolysis, and small system integration.
OEM Integration
Small hydrogen demand for OEM systems, testing equipment, and custom devices.
Small Pilot Projects
Initial hydrogen project validation before moving to larger H-Series or industrial systems.
Inside Our Manufacturing & Quality System
Hele Titanium supports stack integration, cabinet assembly, piping and wiring, controller setup, testing, and export packing for compact PEM electrolyzer systems.
Stack Integration
Cabinet Assembly
Piping & Wiring
Function Testing
Engineer Inspection
Packing & Export
Compare HELE PEM Electrolyzer Series
The S-Series is best for compact hydrogen production. For larger hydrogen demand, review our other series.
| Series | Capacity Range | Best For |
|---|---|---|
| S-Series Compact | 0.5–1 Nm³/h | Laboratory, R&D, education, small pilot systems |
| H-Series Mid-Range | 5 Nm³/h reference | On-site hydrogen supply, microgrids, pilot industrial projects |
| C-Series Industrial | 6–10 Nm³/h | Industrial hydrogen supply, refueling support, process use |
| M-Series High-Capacity | 10–50 Nm³/h | Large hydrogen projects, utility storage, multi-skid systems |
| Containerized | 50–300 Nm³/h | Outdoor, remote, renewable, or rapid deployment projects |
S-Series FAQ
Common questions about the S-Series compact PEM electrolyzer systems.
What is the S-Series compact PEM electrolyzer used for?
The S-Series is used for laboratory hydrogen generation, university research, R&D testing, education platforms, small pilot systems, OEM integration, and small hydrogen demand applications.
What hydrogen output range does the S-Series support?
The S-Series configurations shown on this page cover 0.5–1 Nm³/h; contractual output depends on the agreed operating conditions. Final configuration should be reviewed according to required hydrogen demand, operating hours, purity, pressure, and downstream use.
Is the S-Series suitable for laboratory hydrogen generation?
Yes. The S-Series is designed for compact hydrogen production where laboratory space, safety, operating flexibility, and system documentation are important.
Can the S-Series be used for pilot testing?
Yes. It can be used for small pilot hydrogen projects, early-stage validation, R&D testing, and demonstration before moving to higher-capacity PEM electrolyzer systems.
What is the difference between the S-Series and H-Series?
The S-Series is mainly for compact hydrogen demand from 0.5–1 Nm³/h. The H-Series uses a 5 Nm³/h reference configuration for projects needing a larger on-site supply and a longer operating schedule.
Can hydrogen purity and outlet pressure be customized?
Hydrogen purity, outlet pressure, drying, gas handling, and downstream interface can be reviewed according to project requirements and selected configuration.
What water quality is required?
PEM electrolyzers require purified or deionized water with stable quality. Water conductivity, water source, treatment method, and circulation conditions should be reviewed before configuration.
What information is needed for an S-Series quotation?
Please provide application, hydrogen output, purity target, outlet pressure, operating hours, power supply, water quality, installation site, control requirements, documentation needs, and delivery schedule.
Can you provide documentation with the S-Series?
Yes. Available documents may include technical datasheet, operation manual, inspection record, FAT report when required, packing list, certificate, and project-specific documents.
Can the S-Series be customized for OEM or research projects?
Yes. The S-Series can be reviewed for OEM, research, education, and pilot applications according to hydrogen output, footprint, interface, control, safety, and documentation requirements.
Inquiry
Request a S-Series Compact PEM Electrolyzer Review
For a compact installation, the useful starting point is the hydrogen duty and the available utilities—not the cabinet footprint alone. Send the application, expected operating pattern and any drawing you already have; HELE can review the appropriate S-Series configuration and quotation boundary.
- ✓ Hydrogen demand and operating hours
- ✓ Required outlet condition and downstream use
- ✓ Power, water, cooling and site constraints
- ✓ Drawing, quantity and acceptance documents
Prefer email?
sales@heletitanium.comFactory & Engineering Center
Titanium Valley, Baoji City, Shaanxi Province, China