Natural gas analyzer Gasboard-3520

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Product Overview
Gasboard-3520 is an online natural gas calorific value analyzer that delivers continuous, metering-grade measurement of gas composition and energy parameters. It integrates NDIR, TDLAS, TCD and ultrasonic sensing to provide real-time outputs of gross/net calorific value, Wobbe index, density and key component concentrations. The unit is explosion-proof (Ex) and complies with OIML R140 Class A for fiscal custody transfer applications. Multiple communications (RS232/RS485, 4-20 mA, TCP/IP) and automatic calibration support long-term, low-maintenance operation.

Application

• Natural gas production and processing: real-time composition and calorific monitoring for quality control.
• Fiscal gas metering and trade settlement: metering-grade measurements compliant with OIML R140 Class A.
• Pipeline transmission and distribution: gas quality monitoring and hydrogen blending management in networks.
• Gas turbine and power generation: real-time calorific data for combustion optimization and emissions control.
• Biomethane and renewable gas: composition and energy value verification for injection and utilization.

Features

• Integrated multi-technology sensing: NDIR, TDLAS, TCD and ultrasonic methods for continuous, fast and stable analysis compared with conventional GC.
• Comprehensive energy outputs: gross/net calorific value, higher/lower Wobbe index, standard and relative density, plus CO2, H2, CH4 and C2+ concentrations.
• Hydrogen-blended gas compatibility: accurate simultaneous measurement of hydrogen and hydrocarbons without carrier gas.
• Meteorological and fiscal compliance: OIML R140 Class A capability for custody transfer.
• Low maintenance design: no combustion, no carrier gas or consumables required.

Specifications

• Gross Calorific Value (HsV): 33.966 ～ 46.954 MJ/m³ — output: yes
• Net Calorific Value (HiV): 31.467 ～ 42.458 MJ/m³ — output: yes
• Higher Wobbe Index (Ws): 43.956 ～ 53.946 MJ/m³ — output: yes
• Lower Wobbe Index (Wi): 41.3 ～ 51.6 MJ/m³ (composition-dependent) — output: yes
• Standard Density (Rho): 0.66 ～ 1.04 kg/m³ — output: yes
• Relative Density (d): 0.5 ～ 0.8 — output: yes
• CO2: 0 ～ 5 %vol — output: yes
• H2: 0 ～ 10 %vol — output: yes

Performance & Operational Data

• 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
• Update rate: 1 Hz; Response time (T90) ≤ 6 s
• 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: -25℃ ～ +70℃; Relative humidity: 5 ～ 85% RH (non-condensing)
• Environmental protection: IP65; Electromagnetic/Mechanical grade: E2 / M1

Interfaces & Approvals

• Analog outputs: 4 ～ 20 mA
• Digital interfaces: RS232 or RS485; TCP/IP supported
• Metrological approval: OIML R140 Class A
• Explosion protection: Ex db IIC T6 Gb / Ex tb IIIC T80℃ Db

Technical specifications

• Model: Gasboard-3520
• Measurement outputs: gross/net calorific value, higher/lower Wobbe index, standard and relative density, CO2, H2, C1, C2+ and other hydrocarbons
• Calorific value ranges: HsV 33.966–46.954 MJ/m³; HiV 31.467–42.458 MJ/m³
• Wobbe index ranges: Ws 43.956–53.946 MJ/m³; Wi 41.3–51.6 MJ/m³ (composition-dependent)
• Gas component ranges: CO2 0–5 %vol; H2 0–10 %vol; CH4 60–100 %vol; C2+ 0–15 %vol
• Accuracy / MPE and repeatability as stated above
• Update rate: 1 Hz; Response time (T90) ≤ 6 s
• Protection & approvals: IP65, E2/M1, OIML R140 Class A, Ex db IIC T6 Gb / Ex tb IIIC T80℃ Db
• Communication: 4–20 mA analog outputs; RS232/RS485; TCP/IP