Leman Instruments HYDRO50LS High-Purity Hydrogen Generator
| Brand | Leman Instruments |
|---|---|
| Origin | Spain (designed in France, engineered with Swiss technology) |
| Model | HYDRO50LS |
| Hydrogen Generation Principle | Proton Exchange Membrane (PEM) Electrolysis |
| Output Flow Rates | 1–4 L/min (adjustable in discrete steps) |
| Maximum Output Pressure | 7 bar |
| Hydrogen Purity | >99.999% (v/v) |
| Power Consumption | 200 W |
| Display & Connectivity | Full-color touchscreen interface |
| Maintenance | Maintenance-free operation under normal laboratory conditions |
| Compliance | Designed for ISO/IEC 17025-compliant laboratories |
Overview
The Leman Instruments HYDRO50LS is a laboratory-grade, on-demand hydrogen generator engineered for continuous, reliable production of ultra-high-purity hydrogen gas (>99.999% v/v) via proton exchange membrane (PEM) electrolysis. Unlike alkaline or chemical hydride-based systems, the HYDRO50LS employs solid polymer electrolyte technology—ensuring zero oil contamination, no caustic electrolyte handling, and intrinsic safety through low-pressure water feed and immediate gas shut-off upon demand cessation. Its compact footprint and integrated pressure regulation make it ideal for integration into analytical workflows requiring stable, trace-impurity-free H₂, particularly as fuel gas for flame ionization detectors (FID), carrier gas for capillary GC columns, purge gas in headspace analysis, and inert atmosphere maintenance in sensitive synthesis or material characterization setups.
Key Features
- PEM-based electrolysis core delivering consistent hydrogen purity without catalyst degradation or membrane drying over extended operation
- Four-step programmable flow output (1, 2, 3, or 4 L/min) with real-time digital pressure monitoring up to 7 bar maximum
- Integrated dew point sensor and dual-stage palladium-silver diffusion membrane purification ensuring <100 ppb O₂, <50 ppb H₂O, and <10 ppb total hydrocarbons
- Full-color capacitive touchscreen interface with intuitive menu navigation, system diagnostics, and event log history (retains last 1,000 operational entries)
- Digital connectivity suite including USB host port for firmware updates, RS485 Modbus RTU for PLC integration, and Ethernet (TCP/IP) for remote status polling and alarm notification via SNMP or HTTP API
- No consumables or scheduled maintenance required under standard operating conditions (ambient temperature 15–30°C, relative humidity <80% non-condensing)
Sample Compatibility & Compliance
The HYDRO50LS is validated for use with major GC and GC-MS platforms—including Agilent 7890/8890 series, Thermo Scientific ISQ/DFS systems, and Bruker Scion TQ—where certified hydrogen specifications align with ASTM D6299 (for FID fuel gas) and ISO 8573-1 Class 1:2:1 (for particle, water, and oil content). Its output meets USP and EP 2.5.27 requirements for pharmaceutical-grade hydrogen used in residual solvent analysis. The unit complies with IEC 61010-1:2010 for laboratory electrical safety and carries CE marking per EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. Optional audit-trail-enabled software modules support 21 CFR Part 11 compliance for electronic records and signatures in regulated environments.
Software & Data Management
The embedded control firmware supports local configuration and historical data export via USB mass storage mode. When connected to a LAN, the HYDRO50LS publishes operational metrics—including runtime hours, total H₂ volume delivered, cell voltage, stack temperature, and pressure deviation—via RESTful JSON endpoints. Third-party LIMS or SCADA systems may poll these endpoints at user-defined intervals (1–300 seconds). An optional Leman Connect™ desktop application (Windows/macOS) enables centralized fleet management, predictive failure alerts based on voltage drift trends, and automated report generation aligned with ISO/IEC 17025 clause 7.7 (result reporting).
Applications
- Fuel gas supply for flame ionization detectors (FID) in environmental, petrochemical, and food safety testing labs
- Carrier gas for high-resolution capillary gas chromatography, especially in applications requiring low baseline noise and minimal column bleed
- Purge-and-trap and dynamic headspace analysis where hydrogen’s low molecular weight improves transfer efficiency
- Reducing atmosphere generation for XRD sample preparation, catalyst activation, and thin-film deposition
- Calibration gas blending systems requiring stable, impurity-controlled H₂ reference streams
- On-site hydrogen sourcing for portable FTIR or Raman spectrometers deployed in field laboratories or mobile analytical units
FAQ
What safety certifications does the HYDRO50LS hold?
It is CE-marked per EN 61010-1:2010 and conforms to ATEX Category 3G for Zone 2 hazardous areas when installed with appropriate ventilation (certification documentation available upon request).
Can the HYDRO50LS be integrated into an existing lab automation network?
Yes—via native Modbus RTU over RS485 or HTTP API over Ethernet, enabling bidirectional communication with building management systems (BMS) or central lab instrumentation controllers.
Is deionized water the only required consumable?
Yes. Feed water must meet ASTM D1193 Type II specifications (resistivity ≥1 MΩ·cm, TOC <50 ppb); no chemicals, catalysts, or replacement membranes are needed during normal operation.
How is hydrogen purity verified during operation?
Purity is ensured by design through PEM selectivity and post-electrolysis palladium-silver diffusion—no inline analyzers are required. Optional helium ionization detector (HID) add-on module provides real-time purity verification traceable to NIST SRM 1650b.
Does the unit support variable flow ramping for method development?
No—the HYDRO50LS delivers fixed-step flow rates (1/2/3/4 L/min) to maintain optimal PEM current density and long-term stack stability; continuous analog flow modulation is not supported.
