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ABB AO2000-LS25

1. Core Function & Architecture

  • Primary Role: Laser gas analyzer module within ABB’s Advance Optima series, utilizing Tunable Diode Laser Absorption Spectroscopy (TDLAS) for real-time gas concentration measurement.
  • Modular Design: Integrates with up to four analysis modules and six sample components per system for multi-gas monitoring (e.g., CO₂, CH₄, O₂).
  • Output Signals:
    • Analog Outputs: Configurable 4–20 mA, 0–20 mA, 0–10 V, or ±10 V (16-bit resolution, ±0.1% accuracy).
    • Digital Interfaces: PROFIBUS DP, Modbus TCP/IP, EtherNet/IP, RS-232, and OPC servers.
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Detailed content

2. Performance Metrics

  • Measurement Range: 0–25% O₂ (default), customizable for other gases (e.g., CO: 0–1,000 ppm, CH₄: 0–100%).
  • Accuracy: ±0.1% of full scale for O₂; ±2 ppm for trace gases.
  • Response Time: <1 second for real-time process control.
  • Calibration: Automatic self-calibration via internal sealed cells or ambient air.

3. Environmental & Electrical

  • Operating Temperature: -40°C to +85°C (extended); -20°C to +55°C (standard).
  • Power Supply: 24 VDC (standard) or 115/230 VAC (optional).
  • Robustness:
    • IP65/IP67 sealing for dust/moisture resistance.
    • Conformal-coated electronics for humidity tolerance (5–95% non-condensing).
  • Safety Certifications: ATEX, IECEx, CSA Class I Division 2, GOST-R.

4. Mechanical Specifications

  • Dimensions: 380 × 180 × 110 mm (analyzer); 84 × 22.5 × 114 mm (I/O module).
  • Weight: 5 kg (analyzer); 0.2 kg (I/O module).
  • Installation: DIN rail or wall-mounting; flange-purged enclosures for duct mounting.

Functional Features

1. Advanced Sensing & Diagnostics

  • Laser Technology: TDLAS enables precise gas detection without cross-sensitivity.
  • Self-Diagnostics: Monitors optical window contamination, laser degradation, and signal integrity.
  • Fault Detection: Wire break/short-circuit alerts per channel.

2. System Integration

  • Centralized Management: Compatible with ABB AO2000 central units.
  • Remote Operation: Ethernet TCP/IP and OPC support for SCADA/DCS integration.
  • Data Logging: Stores calibration history and fault logs.

3. Safety & Compliance

  • Explosion Protection: Pressurized enclosures and intrinsic safety (Ex ia/ib).
  • Laser Safety: Class 1M per IEC 60825-1.

Application Scenarios

Industry Use Cases Key Capabilities
Oil & Gas Flare gas monitoring (CH₄), H₂S detection in pipelines. TDLAS for explosive gases; ATEX/IP65 ruggedness.
Power Generation Combustion optimization in turbines; boiler CO/O₂ measurement. <1s response; auto-calibration.
Chemical Processing HCl/Cl₂ leak detection; reactor gas control. Multi-gas flexibility; ±0.1% accuracy.
Metallurgy Furnace atmosphere analysis (O₂, CO) for steel production. -40°C to +85°C operation.
Environmental Continuous Emissions Monitoring (CEMS) for compliance. Modbus/PROFIBUS reporting.

Technical Differentiation

Parameter ABB AO2000-LS25 Competitors (e.g., Siemens LDS 6)
Calibration Gasless auto-calibration. Manual calibration with test gases.
Response Time <1 second. ≥5 seconds.
Output Flexibility Software-configurable 4-20mA/0-10V/±10V. Fixed 4-20mA only.

Integration & Maintenance

  • Installation:
    • Requires 0.5–1.0 L/min purge gas flow for dirty stacks.
    • Laser alignment jigs for optical calibration.
  • Software: ABB AO2000 Configuration Suite for parameterization.
  • Maintenance:
    • Quarterly optical window cleaning.
    • Biannual battery replacement.
  • Accessories: Compatible with ABB purge flanges (e.g., PFEA111-65).

Procurement & Support

  • Ordering: Base code AO2000-LS25; suffixes denote gas-specific lasers (e.g., -CH4).
  • Warranty: 12 months with calibration certificates.
  • Lead Time: 3–5 days (stock); 4–6 weeks (custom).

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