ADEV 5866 Online Hydrogen-in-Oxygen Analyzer
| Origin | Italy |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | 5866 |
| Price | USD 12,300 (FOB Italy) |
| Measurement Principle | Constant-Temperature Thermal Conductivity Detection with Integrated Temperature Compensation |
| Range | 0–2% H₂ in O₂ (v/v) and 0–2% O₂ in H₂ (v/v) |
| Accuracy | ±0.1% FS |
| Repeatability | ±0.1% FS |
| Resolution | 0.01% |
| Response Time (T90) | ≤10 s |
| Operating Temperature | −20 to +50 °C |
| Storage Temperature | −40 to +70 °C |
| Humidity Range | 0–95% RH (non-condensing) |
| Sample Flow Rate | 0.4–0.6 L/min |
| Power Supply | 220 VAC ±10%, 50 Hz, 10 W |
| Output Signals | 4–20 mA (300 Ω load), RS485 Modbus RTU, Relay Alarm Outputs (High/Low) |
| Enclosure Rating | IP65 |
| Explosion Protection | Ex ia IIC T4 Ga (intrinsically safe, integrated safety barrier) |
| Sensor Lifetime | >10 years |
| Display | 7-inch capacitive touchscreen HMI |
| Panel Cutout | 139 mm × 139 mm |
| Field Unit Dimensions | 580 mm × 460 mm × 180 mm (H×W×D) |
Overview
The ADEV 5866 Online Hydrogen-in-Oxygen Analyzer is a high-stability, intrinsically safe thermal conductivity gas analyzer engineered for continuous, real-time quantification of hydrogen concentration in high-purity oxygen streams—and vice versa—within industrial process environments. It operates on the fundamental principle of thermal conductivity differential detection: hydrogen exhibits significantly higher thermal conductivity (~7×) than oxygen at ambient conditions; this physical property difference enables precise, selective measurement without chemical reaction or consumable reagents. The analyzer integrates a temperature-stabilized, micro-engineered thermal conductivity cell with active temperature compensation circuitry, ensuring minimal drift across ambient fluctuations typical in plant-floor installations. Designed specifically for purity assurance in medical-grade, semiconductor-grade, and metallurgical-grade oxygen production lines—as well as hydrogen purification and synthesis loops—the 5866 delivers metrologically traceable performance compliant with ISO 8573-1 (compressed air purity), ASTM D1946 (gas analysis), and IEC 60079-0/11 (intrinsic safety requirements). Its fixed-range configuration (0–2% v/v) optimizes signal-to-noise ratio and long-term baseline stability for trace-level impurity monitoring where hydrogen is the dominant interferent.
Key Features
- Constant-temperature thermal conductivity sensor with embedded Pt100 temperature compensation, eliminating thermal drift over operating range (−20 to +50 °C)
- Intrinsically safe field unit certified to Ex ia IIC T4 Ga, including integrated Zener safety barrier—no external barrier required
- Proven sensor lifetime exceeding 10 years under continuous operation, validated per IEC 62443-2-4 functional safety lifecycle guidelines
- 7-inch industrial-grade capacitive touchscreen HMI with intuitive menu navigation, real-time trend plotting, and configurable alarm thresholds
- Dual-range capability: measures both H₂ in O₂ and O₂ in H₂ within the same 0–2% v/v span, supporting bidirectional purity verification
- Optimized gas path design featuring laminar-flow conditioning, low-dead-volume fittings, and stainless-steel wetted parts (316L) compatible with ultra-high-purity service
- Simultaneous analog (4–20 mA), digital (RS485 Modbus RTU), and discrete relay outputs (SPDT, 250 VAC/2 A) for seamless integration into DCS, PLC, and SCADA systems
Sample Compatibility & Compliance
The ADEV 5866 is qualified for use with dry, particle-free oxygen and hydrogen streams meeting ISO 8573-1 Class 2:2:2 specifications (oil-free, ≤0.1 µm particles, dew point ≤ −40 °C). It is not suitable for corrosive, condensing, or heavily particulate-laden gases. All wetted materials—including sample inlet, flow restrictor, sensor chamber, and exhaust—comply with ASTM A269 TP316L requirements and are electropolished to Ra ≤ 0.4 µm. The analyzer meets electromagnetic compatibility standards per EN 61326-1 (industrial environment) and carries CE marking under the EU ATEX Directive 2014/34/EU and the EMC Directive 2014/30/EU. For regulated pharmaceutical or biotech applications, audit-ready data logging (with time-stamped events, calibration history, and alarm logs) supports compliance with FDA 21 CFR Part 11 when paired with validated third-party SCADA software.
Software & Data Management
The embedded firmware supports Modbus RTU protocol over RS485 for bidirectional communication with host control systems, enabling remote configuration, real-time value polling, and event-driven alarm reporting. Local data storage retains 30 days of 1-minute interval measurements (concentration, temperature, flow status, relay states) with cyclic overwrite. All calibration events—including zero/span date, operator ID, reference gas lot number, and deviation values—are logged with ISO/IEC 17025-compliant metadata. Optional Ethernet gateway module (sold separately) enables secure HTTPS-based access to live diagnostics, historical trends, and firmware updates via TLS 1.2 encryption—fully compatible with modern IIoT architectures.
Applications
- Monitoring residual H₂ in cryogenic oxygen production units (ASU off-gas and product streams)
- Verifying O₂ contamination in PEM electrolyzer hydrogen output prior to compression and storage
- Quality assurance in semiconductor fab gas delivery systems (e.g., O₂ purge lines for ALD/CVD tools)
- Safety interlock for hydrogen-rich atmospheres in annealing furnaces and reduction processes
- Process validation during commissioning of high-purity gas distribution networks (ISO 8573-8 Class 1)
- Regulatory compliance testing for medical oxygen (USP , EP 2.5.27) and industrial oxygen (GB/T 8979)
FAQ
What calibration gases are required for routine maintenance?
Zero gas: high-purity nitrogen (≥99.999%) or argon; span gas: certified H₂/N₂ or H₂/O₂ mixtures at 1.0% v/v, traceable to NIST or EUROMET standards.
Is the analyzer compatible with hazardous area zoning beyond Zone 1?
Yes—the Ex ia IIC T4 Ga rating permits installation in Zone 0, Zone 1, and Zone 2 per IEC 60079-10-1, provided cabling complies with IEC 60079-14.
Can the 4–20 mA output be scaled to non-linear ranges?
No—the analog output is linear across the full 0–2% measurement span; custom scaling requires external signal conditioning or DCS-side configuration.
Does the unit support automatic zero calibration?
No—zero calibration is manual and operator-initiated to ensure metrological integrity; automatic zero routines are excluded to prevent drift masking in critical purity applications.
What is the recommended maintenance interval for the thermal conductivity cell?
No scheduled replacement is required; annual verification against certified reference gases and visual inspection of sample filters (included) constitute the full preventive maintenance protocol.
