Product Core Brief
- Model: URAS26 (F-NO 3.346368.0 / A-NO 0240462201/2030)
- Brand: ABB
- Series: EL3000 / AO2000 modular gas analyzer platform
- Core Function: NDIR infrared measurement module for continuous gas analysis in industrial process and emissions monitoring.
- Product Type: Infrared (NDIR) gas analyzer module
- Key Specs: NDIR dual-beam measurement | up to 4 gas components per module | compatible with EL3020/AO2020 platforms | measurable gases include CO, CO2, SO2, NO, CH4, N2O
- Condition: New Original / New Surplus
Product Introduction
The ABB URAS26 is a dual-beam, Luft-type NDIR infrared gas analyzer module used in ABB’s EL3000 and AO2000 modular analyzer platforms. It measures infrared-active gas components—including CO, CO2, SO2, NO, CH4, and N2O—by detecting characteristic absorption wavelengths in a sample gas stream.
Its value lies in long-term lifecycle support for installed CEMS and process gas analyzers. The URAS26 has been in continuous production since the 1950s, with ABB maintaining spare parts availability across decades of field deployments. One module can measure up to 4 components simultaneously, depending on detector and filter configuration.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB |
| Model | |
| Fabrication No. (F-NO) | 3.346368.0 |
| Article No. (A-NO) | 0240462201/2030 |
| Measurement Principle | NDIR (Non-Dispersive Infrared), dual-beam Luft-type |
| Platform Compatibility | EL3000 (EL3020/EL3040/EL3060), AO2000 (AO2020/AO2040) |
| Measurable Gases | CO, CO2, SO2, NO, CH4, N2O (IR-active gases) |
| Max Components per Module | Up to 4 (detector/filter dependent) |
| Typical Range | 0–5 ppm up to 100 vol% (application-dependent) |
| Mechanical Form | Modular plug-in analyzer block |
| Condition | New Original / New Surplus |
Quality Control Process (DYNAMIC GENERATION)
- Visual inspection: Check optical bench, sample cell windows, O-ring seals, and electrical connectors for contamination, cracks, or degradation.
- Nameplate verification: Confirm F-NO 3.346368.0 and A-NO 0240462201/2030 match exactly; both numbers must be legible.
- Optical path inspection: Verify chopper wheel, IR source, and detector alignment; check for window fogging or deposit buildup.
- Leak test: Pressure-test the sample cell and gas fittings to confirm no sample gas leakage before shipment.
- Anti-static and shock packaging: Seal optical surfaces, protect connectors, and cushion the module for transit.
Replacement Pitfall Guide (DYNAMIC GENERATION)
❗ Match both F-NO and A-NO. The fabrication number (3.346368.0) and article number (0240462201/2030) must both be confirmed. Substituting by “URAS26” alone risks detector/filter mismatches.
❗ Verify detector and filter configuration. This module can measure up to 4 gases, but the actual gas set depends on installed detectors and optical filters. A replacement with different filters will not measure your required components.
❗ Confirm host platform compatibility. URAS26 modules are used in EL3020, EL3040, EL3060, AO2020, and AO2040 platforms. Mechanical fit does not guarantee firmware or electrical compatibility—check the host analyzer generation.
❗ Check sample cell length and material. Sample cell dimensions (e.g., 60 mm, 175 mm, 200 mm) and materials vary by application. Wrong cell length shifts measurement range and accuracy.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| URAS26 F-NO 3.346368.0 / A-NO 0240462201/2030 | Same F-NO + A-NO match | Direct | Confirm detector/filter set and sample cell configuration match. |
| URAS26 (other F-NO/A-NO) | URAS26 (different revision) | Needs Adaptation | Detector, filter, and cell configuration may differ; verify against host analyzer. |
| URAS14 | Not Interchangeable | Different generation and mechanical/electrical interface; requires platform verification. | |
| Limas23 / Magnos206 / Caldos27 | Not Interchangeable | Different measurement principles (UV, paramagnetic O2, thermal conductivity); not a drop-in substitute. |
Benchmark notes: The URAS26 uses a dual-beam NDIR principle with ranges from 0–5 ppm up to 100 vol%, depending on detector and filter configuration. Specific T90 response time, linearity, and repeatability values depend on the host analyzer platform (EL3020/AO2020) and configured gas components—verify against the original cabinet documentation.
