Haolong HLH-300WZ Online Hydrogen Generator with Auto-Water Refill

Overview

The Haolong HLH-300WZ Online Hydrogen Generator is an engineered solution for continuous, on-demand hydrogen supply in analytical laboratories and environmental monitoring applications—particularly as a carrier or fuel gas for online volatile organic compound (VOC) analyzers, gas chromatographs (GC), and hydrogen flame ionization detectors (FID). It employs proton exchange membrane (PEM) electrolysis technology, enabling high-purity hydrogen generation from deionized water without caustic electrolytes. Unlike traditional alkaline systems, the PEM architecture ensures rapid start-up, zero alkali carryover, and inherently stable operation under variable load conditions. The unit is designed for unattended 24/7 operation, integrating auto-water refill functionality to eliminate manual intervention and support seamless integration into automated monitoring platforms. Its compact footprint (435 × 175 × 505 mm) and lightweight construction (19 kg) make it suitable for benchtop deployment in space-constrained control rooms or mobile monitoring units.

Key Features

• PEM-based electrolysis core using imported noble-metal catalysts for high efficiency, low overpotential, and extended service life (>10,000 operating hours under nominal load)
• Integrated auto-refill system with level-sensing reservoir and precision solenoid-controlled water injection—ensures uninterrupted operation during extended deployments
• Dual-stage gas purification: stainless steel electrolytic-polished tubing (electropolished to Ra ≤0.4 µm) followed by molecular sieve and palladium-doped copper filters to remove moisture, oxygen, and trace metallic impurities
• Patented anti-backflow design prevents liquid ingress into the electrolyzer stack or downstream instrumentation—critical for GC/FID safety and detector longevity
• Real-time pressure regulation via closed-loop PID-controlled back-pressure valve; factory preset at 0.4 MPa with adjustable range up to 0.5 MPa and stability within ±0.02 MPa
• Overpressure protection (mechanical relief valve + electronic cut-off), thermal shutdown, and leak detection circuitry compliant with IEC 61010-1 for laboratory equipment safety

Sample Compatibility & Compliance

The HLH-300WZ is compatible with all standard 1/8″ and 1/4″ stainless steel or PTFE gas lines used in analytical instrumentation. It delivers hydrogen meeting ASTM D7526–22 specifications for ultra-high-purity carrier gases (Grade 5.5, ≥99.999% purity, O₂ < 0.1 ppmv, H₂O < 1 ppmv, total hydrocarbons < 0.1 ppmv). The generator conforms to ISO/IEC 17025 requirements for in-house reference gas generation when operated with certified deionized water (resistivity ≥18.2 MΩ·cm). Its electrical design complies with CE marking directives (EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU), and mechanical integrity aligns with ASME B31.3 process piping guidelines for low-pressure gas distribution.

Software & Data Management

While the HLH-300WZ operates as a standalone analog device, it supports optional RS-485 Modbus RTU interface for integration into SCADA or LIMS environments. Digital outputs include real-time flow rate (4–20 mA), pressure (4–20 mA), and system status (dry contact alarm signals for low water, overtemperature, or pressure fault). All operational events—including power cycles, refill activations, and pressure deviations—are logged internally with timestamping for GLP-compliant audit trails. Firmware updates are performed via USB port using Haolong’s certified configuration utility, which enforces password-protected parameter changes in accordance with FDA 21 CFR Part 11 requirements for electronic records and signatures.

Applications

• Carrier gas source for online VOC monitoring systems (e.g., TO-14A, EPA Method 25A compliant analyzers)
• Fuel gas supply for hydrogen FID detectors in continuous emission monitoring systems (CEMS)
• Zero-air generator auxiliary for catalytic converters in ambient air quality stations
• Research-grade hydrogen supply for electrochemical cell testing and catalyst evaluation setups
• Replacement for high-pressure hydrogen cylinders in confined lab spaces—eliminating storage hazards, certification overhead, and logistical delays

FAQ

What type of water is required for optimal operation?
Deionized water with resistivity ≥18.2 MΩ·cm and total organic carbon (TOC) < 5 ppb is mandatory. Tap water or distilled water will cause rapid membrane fouling and void the warranty.
Can the HLH-300WZ be integrated with third-party GC systems?
Yes—its analog 4–20 mA outputs and Modbus-ready interface support seamless integration with Agilent, Thermo Fisher, Shimadzu, and PerkinElmer GC platforms via standard gas control modules.
Is routine maintenance required beyond water refills?
Annual replacement of the dual-stage filter cartridge (P/N HLH-FIL-01) and biannual verification of pressure calibration using NIST-traceable gauges are recommended per ISO/IEC 17025 preventive maintenance protocols.
Does the unit meet regulatory requirements for pharmaceutical QC labs?
When deployed with documented water qualification, calibration logs, and change control records, the HLH-300WZ satisfies USP , EP 2.2.42, and ICH Q5C expectations for ancillary gas generation equipment in GMP environments.
What is the expected lifetime of the PEM electrolyzer stack?
Under continuous operation at ≤80% of maximum rated flow and with proper water quality, the stack maintains ≥95% of initial efficiency for ≥10,000 hours—verified through accelerated life-cycle testing per IEC 62282-6-100.