Zhonghuipu DH-300 Ultra-High-Purity Hydrogen Generator
| Brand | Zhonghuipu |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Model | DH-300 |
| Hydrogen Generation Principle | Alkaline Electrolysis |
| Output Flow Rate | 0–300 mL/min |
| Output Pressure | 0–0.5 MPa |
| Hydrogen Purity | 99.99999% |
| Power Consumption | 300 W |
| Dimensions (W×D×H) | 420 × 200 × 350 mm |
| Net Weight | 15 kg |
| Pressure Stability | < 0.0001 MPa |
| Input Power | 220 V ±10%, 50 Hz |
| Sealing Material | Low-Sulfur Silicone O-Rings |
| Purification Method | Palladium Alloy Membrane Filtration |
Overview
The Zhonghuipu DH-300 Ultra-High-Purity Hydrogen Generator is an engineered solution for laboratories requiring continuous, on-demand hydrogen gas with exceptional purity and stability. It operates on the principle of alkaline water electrolysis—where deionized or distilled water is decomposed into hydrogen and oxygen gases under controlled DC current in a KOH-based electrolyte environment. The generated hydrogen passes through a high-selectivity palladium alloy membrane, which permits only atomic hydrogen to permeate and recombine, effectively removing residual oxygen, nitrogen, moisture, and hydrocarbon impurities. This dual-stage purification architecture—electrolytic generation followed by diffusion-based membrane separation—ensures sustained delivery of hydrogen at ≥99.99999% (7N) purity, meeting stringent requirements for trace-level analytical instrumentation and ultra-clean process environments.
Key Features
- Integrated palladium alloy membrane purification system delivering consistent 7N hydrogen purity without consumable desiccants or catalysts
- Electrolyte-free operation: compatible with standard laboratory distilled water—no requirement for ultrapure or deionized water
- Low-sulfur silicone O-rings throughout the gas path minimize sulfur contamination, ensuring baseline stability in sensitive GC-FID and GC-TCD applications
- Digital pressure and flow regulation via closed-loop feedback control, maintaining output pressure stability within ±0.0001 MPa under dynamic load conditions
- Intelligent safety architecture including automatic water-level monitoring, over-pressure cutoff (0.55 MPa threshold), thermal overload protection, and leak detection
- Full automation with self-startup, standby mode, and real-time status display; no routine maintenance required beyond periodic water replenishment
- Compact benchtop footprint (420 × 200 × 350 mm) and lightweight design (15 kg) optimized for integration into confined lab spaces or mobile analytical platforms
Sample Compatibility & Compliance
The DH-300 is validated for use with high-resolution gas chromatography systems—including capillary GC-FID, GC-TCD, and GC-MS configurations—where baseline noise, retention time reproducibility, and detector sensitivity are critically dependent on carrier gas purity. Its 7N hydrogen output satisfies ISO 8573-1:2010 Class 1 compressed air quality equivalency for gaseous contaminants (≤0.1 ppb total hydrocarbons, ≤0.1 ppm H2O, ≤10 ppb O2). The generator complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and supports GLP/GMP-aligned workflows through configurable event logging and alarm history storage. While not certified to FDA 21 CFR Part 11 out-of-the-box, its firmware architecture allows integration with compliant LIMS environments via RS-232 or optional Ethernet interface.
Software & Data Management
The DH-300 features an embedded microcontroller-based operating system with non-volatile memory for storing operational logs—including runtime hours, pressure/flow setpoint history, safety event timestamps, and water level trends. Data export is supported via USB port in CSV format for audit trail reconstruction. Optional PC software provides remote monitoring, parameter adjustment, and predictive maintenance alerts based on cumulative electrolyzer duty cycle. All firmware updates are performed offline using signed binary packages to preserve system integrity—a critical requirement for regulated QC/QA laboratories.
Applications
- Carrier and fuel gas supply for gas chromatographs (GC-FID, GC-TCD, GC-MS) requiring ultra-low background interference
- Hydrogen source for electrochemical analyzers, polarographic sensors, and hydrogenation reactors
- Process gas in semiconductor epitaxy (MOCVD, MBE) where metalorganic precursor decomposition demands inert, sulfur-free reducing atmosphere
- Calibration and reference gas generation in nuclear physics experiments involving neutron moderation or proton beam targeting
- On-site hydrogen supply for portable FTIR and laser spectroscopy systems deployed in field laboratories or cleanrooms
FAQ
What type of water is required for optimal operation?
Distilled water meets all operational requirements; deionized or ultrapure water is unnecessary and may increase electrolyte conductivity instability.
Does the DH-300 require periodic replacement of filters or membranes?
No—the palladium alloy membrane is designed for lifetime operation under specified flow and pressure conditions; no scheduled replacement is required.
Can the generator be integrated into an automated GC sequence?
Yes—via TTL-triggered start/stop signals and analog 0–10 V output for external flow synchronization.
Is the unit suitable for Class 100 cleanroom environments?
Yes—the sealed enclosure, low-outgassing materials, and absence of desiccant beds prevent particulate or volatile organic emissions.
How does the DH-300 compare to hydrogen cylinders in terms of safety compliance?
It eliminates high-pressure storage hazards, reduces cylinder handling risks, and complies with local fire codes restricting compressed gas inventory in laboratory buildings.
