Huifen Instruments ZQHF-300 High-Purity Hydrogen Generator
| Brand | Huifen Instruments |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | ZQHF-300 |
| Hydrogen Generation Principle | PEM-free Alkaline Electrolysis |
| Output Flow Rate | 300–500 mL/min |
| Output Pressure | 43–116 psi (0.3–0.8 MPa) |
| Hydrogen Purity | 99.9995% v/v |
| Power Consumption | 100 W |
| Input Voltage | 220 V AC, 50 Hz |
| Operating Temperature | 0–40 °C |
| Relative Humidity | <85% RH |
| Dimensions | 5U rack-mountable form factor |
| Weight | 12 kg |
Overview
The Huifen Instruments ZQHF-300 High-Purity Hydrogen Generator is an engineered solution for continuous, on-demand hydrogen supply in analytical laboratories and industrial R&D environments. It employs alkaline electrolysis—specifically a cylindrical, bucket-type electrolytic cell—to split deionized water into high-purity hydrogen and oxygen gases. Unlike membrane-based (PEM) systems, this design eliminates the need for expensive proton-exchange membranes while maintaining robust performance under variable load conditions. The integrated electrolysis chamber enables simultaneous electrolyte storage, hydrogen generation, and oxygen venting—resulting in low cell temperature rise, extended service life, and improved thermal stability. With a certified purity of 99.9995% v/v (residual oxygen ≤ 0.5 ppm), the ZQHF-300 meets stringent gas quality requirements for applications including gas chromatography (GC) carrier gas, fuel cell testing, hydrogenation reactors, and reducing atmospheres in material synthesis.
Key Features
- Bucket-type alkaline electrolytic cell with large effective electrode area—enhances current density uniformity and minimizes localized heating.
- Intelligent pressure-regulated output: automatically modulates hydrogen production rate to match real-time demand, ensuring stable delivery pressure between 43–116 psi (0.3–0.8 MPa).
- Digital LED flow display provides real-time, linear readout of output volume (0–500 mL/min) with ±2% full-scale accuracy.
- Anti-backflow protection system prevents electrolyte migration into downstream instrumentation—critical for safeguarding GC injectors, detectors, and catalytic reactors.
- Stainless-steel gas storage tank and purification column ensure long-term corrosion resistance and consistent gas conditioning.
- Auto-refill function supports both continuous operation and intermittent use without manual intervention.
- Compact 5U rack-mountable chassis (12 kg net weight) facilitates integration into centralized gas supply systems or benchtop analytical workstations.
Sample Compatibility & Compliance
The ZQHF-300 is compatible with standard laboratory-grade deionized water (≥1 MΩ·cm resistivity) and requires no external gas cylinders or consumable cartridges. Its output gas stream complies with ISO 8573-1:2010 Class 1 for particulate content and Class 2 for moisture, following internal dual-stage desiccant and palladium-doped molecular sieve purification. While not certified to UL/CE standards out-of-the-box, the unit adheres to IEC 61010-1 safety principles for laboratory electrical equipment. For regulated environments—including GLP, GMP, or FDA 21 CFR Part 11 workflows—the generator supports optional audit-trail-enabled digital logging when interfaced with third-party SCADA or LIMS platforms via analog 0–5 V or 4–20 mA signals.
Software & Data Management
The ZQHF-300 operates as a standalone hardware platform with no embedded firmware or proprietary software dependency. All operational parameters—including pressure setpoint, flow threshold alarms, and runtime hours—are configured via front-panel tactile controls. Analog output interfaces (0–5 V DC for flow, 4–20 mA for pressure) allow seamless integration with programmable logic controllers (PLCs), building management systems (BMS), or custom LabVIEW-based monitoring dashboards. Optional RS-485 Modbus RTU communication module (sold separately) enables remote status polling, fault diagnostics, and event-triggered notifications—supporting traceability in auditable laboratory environments.
Applications
- Carrier gas source for capillary GC and GC-MS systems requiring ultra-high-purity hydrogen.
- Feedstock for catalytic hydrogenation studies in organic synthesis and pharmaceutical process development.
- Reducing atmosphere generation in tube furnaces for metal oxide reduction and thin-film deposition.
- Fuel supply for PEM and SOFC test stations during electrochemical performance evaluation.
- Calibration gas generation for hydrogen sensors and leak detection equipment.
- On-site hydrogen provisioning for portable FTIR spectrometers and field-deployable gas analyzers.
FAQ
What type of water is required for optimal operation?
Deionized water with resistivity ≥1 MΩ·cm and total organic carbon (TOC) < 50 ppb is recommended. Tap water or distilled water alone is unsuitable due to ion contamination that accelerates electrode degradation.
Does the ZQHF-300 require periodic maintenance beyond refilling water?
Yes—electrolyte solution (20–30% KOH by weight) should be replaced every 6–12 months depending on usage frequency; the stainless-steel purification column requires replacement every 2 years under continuous operation.
Can output pressure be customized beyond the standard 0.3–0.8 MPa range?
Yes—custom pressure calibration up to 1.2 MPa is available upon factory order with reinforced pressure vessel certification and modified safety valve settings.
Is the unit suitable for use in explosion-hazardous areas (ATEX Zone 1/2)?
No—ZQHF-300 is rated for general laboratory use only (non-certified for hazardous locations). Integration into classified zones requires additional engineering controls, such as external hydrogen monitors and forced ventilation interlocks.
How does the anti-backflow mechanism function?
A gravity-assisted hydrophobic barrier and check-valve assembly physically isolates the electrolyte reservoir from the gas outlet path, preventing liquid carryover even during rapid pressure transients or power cycling.
