Process Gas Analyzers
Gasboard-3520
Explosion-proof Natural Gas Calorific Value Analyzer
- Model
- Gasboard-3520
- Category
- Gas Analyzers › Process Gas Analyzers
Parameters: CO2, C2+ hydrocarbons, H2 fraction, Calorific value, Wobbe index, Density
IndustriesEnergy & Biogas
Overview
Gasboard-3520 is an ATEX-certified online calorific value analyzer for natural gas and hydrogen blends, combining NDIR, TDLAS, TCD and ultrasonic sensing to calculate gross and net calorific value, Wobbe index and compressibility factor. It meets OIML R140 Class A for custody transfer, needs no carrier gas or consumables, and connects to DCS via RS485, 4-20 mA and TCP/IP.
Key Features
- Integrated Sensing Technologies: Integrates NDIR, TDLAS, TCD, and ultrasonic technologies to enable continuous real-time gas analysis with faster response and superior stability compared to conventional gas chromatographs (GC).
- Comprehensive Gas Parameter Output: Provides complete measurement output covering key gas components including CO₂, C₂+ heavy hydrocarbons and hydrogen fraction, as well as energy parameters including gross and net calorific value, Wobbe index, and density.
- Hydrogen-blended Gas Compatibility: Enables accurate and reliable hydrogen and hydrocarbon content measurement simultaneously, overcoming the carrier gas limitations of conventional GC analyzers.
- OIML R140 Class A High Precision: Complies with OIML R140 Class A requirements, delivering metering-grade measurement accuracy for fiscal custody transfer applications.
- Simplified Operation and Maintenance: Requires no combustion, carrier gas, or consumables, eliminating the complex auxiliary systems of conventional GC analyzers and reducing overall operating costs.
Measured Parameters
| Parameter | Measuring Range |
|---|---|
| CO2 | To be confirmed |
| C2+ hydrocarbons | To be confirmed |
| H2 fraction | To be confirmed |
| Calorific value | To be confirmed |
| Wobbe index | To be confirmed |
| Density | To be confirmed |
Specifications
| Model | Measurement Name | Formula | Range | Output |
|---|---|
| Measurements and Ranges | Gross Calorific Value⁽1⁾ | HsV | 33.966 ～ 46.954 MJ/m³(2)(4) | Yes |
| Net Calorific Value⁽1⁾ | HiV | 31.467 ～ 42.458 MJ/m³(2)(4) | Yes |
| Higher Wobbe Index⁽1⁾ | Ws | 43.956 ～ 53.946 MJ/m³(2)(4) | Yes |
| Lower Wobbe Index⁽1⁾ | Wi | 41.3 ～ 51.6 MJ/m³ (composition-dependent) | Yes |
| Standard Density⁽3⁾ | Rho | 0.66 ～ 1.04 kg/m³ | Yes |
| Relative Density⁽3⁾ | d | 0.5 ～ 0.8 | Yes |
| Carbon Dioxide Concentration | CO₂ | 0 ～ 5 %vol | Yes |
| Hydrogen Concentration | H₂ | 0 ～ 10 %vol | Yes |
| Performance Metrics | Measurement Uncertainty | - | HsV/HiV/Ws/Wi/d ≤ 0.5%; / CO₂/H₂ ≤ 1.0% : MPE ≤ ±0.1 / CO₂/H₂ > 1.0% : MPE ≤ ±10% |
| Repeatability | - | HsV/HiV/Ws/Wi/d ≤ 0.1%; / CO₂/H₂ ≤ 1.0% : Repeatability ≤ ±0.02 / CO₂/H₂ > 1.0% : Repeatability ≤ ±2% |
| Analysis Update Rate | - | 1 Hz |
| Response Time (T90) | - | ≤ 6 s |
| Range of Appropriate Gases | Carbon Dioxide Concentration | CO₂ | 0 ～ 5 %vol | Yes |
| Hydrogen Concentration | H₂ | 0 ～ 10 %vol | Yes |
| Methane | C1 | 60 ～ 100 %vol | Yes |
| Ethane and Higher Alkanes | C2+⁽5⁾ | 0 ～ 15 %vol | Yes |
| Propane | C₃H₈ | 0 ～ 3 %vol |
| Isobutane / n-Butane | C₄H₁₀ | 0 ～ 1 %vol / 0 ～ 1 %vol |
| Isopentane / n-Pentane | C₅H₁₂ | 0 ～ 0.5 %vol / 0 ～ 0.5 %vol |
| Hexane and Higher Hydrocarbons | C₆H₁₄ (CₙH₂ₙ₊₂, n≥6) | 0 ～ 0.3 %vol |
| Nitrogen | N₂ | 0 ～ 10 %vol |
| Operational Specifications | Inlet Gas Pressure | - | 2 ～ 50 kPa |
| Optimal Flow Rate | - | 0.7 ～ 1.2 L/min |
| Power Supply | - | AC 220V ±10%, 50Hz ±1Hz |
| Operating Temperature | - | -10℃ ～ +50℃ |
| Storage Temperature | - | -25℃ ～ +70℃ |
| Relative Humidity | - | 5 ～ 85% RH (non-condensing) |
| Environmental Protection | - | IP65 |
| Electromagnetic / Mechanical Grade | - | Electromagnetic E2 / Mechanical M1 |
| Interfaces & Communication | Analog Outputs | - | 4 ～ 20 mA |
| Digital Interfaces | - | RS232 or RS485 |
| Approvals & Certifications | Metrological Approval | - | OIML R140 Class A |
| Explosion Protection | - | Ex db IIC T6 Gb / Ex tb IIIC T80℃ Db |
Applications
- Natural gas production and processing
- Fiscal gas metering and trade settlement
- Pipeline transmission and distribution
- Gas turbines and power generation
- Biomethane and renewable gas
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