Biogas analyzer Gasboard-3520

natural gashydrogengas

Product Description
Gasboard-3520 is an advanced online natural gas calorific value analyzer designed for precise calorific value measurement and composition analysis of natural gas and hydrogen-blended gas. Based on integrated NDIR, TDLAS, TCD and ultrasonic sensing technologies, Gasboard-3520 measures gas concentrations and density to automatically calculate gross and net calorific value, Wobbe index and gas compressibility factor (Z) for flow correction. The unit is compliant with OIML R140 Class A requirements for high-accuracy fiscal custody transfer metering and is ATEX certified for hazardous industrial environments. Multiple communication interfaces (RS485, 4–20 mA, TCP/IP) enable integration with Distributed Control Systems (DCS). The analyzer supports automatic calibration and is designed for low maintenance and long-term reliable operation.

Application

• Natural Gas Production & Processing: Real-time gas composition analysis for quality control.
• Fiscal Gas Metering & Trade Settlement: Metering-grade measurement compliant with OIML R140 Class A requirements for custody transfer and energy pricing.
• Pipeline Transmission & Distribution: Gas quality analysis for blending control and management of natural gas and hydrogen-blended gas.
• Gas Turbine & Power Generation: Real-time calorific data to optimize combustion and reduce emissions.
• Biomethane & Renewable Gas: Composition and calorific value analysis for biomethane injection and renewable gas utilization.

Key Features

• Integrated sensing technologies: NDIR, TDLAS, TCD and ultrasonic for continuous real-time analysis with fast response and high stability.
• Comprehensive output: Measures CO2, C2+ heavy hydrocarbons and hydrogen fraction and provides energy parameters including gross/net calorific value, Wobbe index and density.
• Hydrogen-blended gas compatibility: Accurate simultaneous measurement of hydrogen and hydrocarbons.
• OIML R140 Class A compliance: Metering-grade accuracy suitable for fiscal custody transfer applications.
• Simplified operation and low maintenance: No combustion, carrier gas or consumables required.

Specifications (selected fields presented as table lines)
Measurements and Ranges:
Gross Calorific Value (HsV): 33.966 ～ 46.954 MJ/m³
Net Calorific Value (HiV): 31.467 ～ 42.458 MJ/m³
Higher Wobbe Index (Ws): 43.956 ～ 53.946 MJ/m³
Lower Wobbe Index (Wi): 41.3 ～ 51.6 MJ/m³ (composition-dependent)
Standard Density (Rho): 0.66 ～ 1.04 kg/m³
Relative Density (d): 0.5 ～ 0.8
CO2 Concentration: 0 ～ 5 %vol
H2 Concentration: 0 ～ 10 %vol

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:
CH4 (C1): 60 ～ 100 %vol
C2+ (ethane and higher): 0 ～ 15 %vol (output is sum of ethane and higher alkanes)
C3H8 (propane): 0 ～ 3 %vol
C4H10 (isobutane/n-butane): up to 1 %vol
C5H12 (isopentane/n-pentane): up to 0.5 %vol
C6H14 and higher: up to 0.3 %vol
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 & Explosion Protection:
Metrological Approval: OIML R140 Class A
Explosion Protection: Ex db IIC T6 Gb / Ex tb IIIC T80℃ Db