CUBIC INSTRUMENTS Gasboard-3110P Portable NDIR Natural Gas Calorific Value Analyzer
| Brand | CUBIC INSTRUMENTS |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | Gasboard-3110P |
| Product Category | Natural Gas Analyzer |
| Measurement Range | CH₄, CO₂ (0–100) % |
| Resolution | 0.01 % |
| Response Time | T₉₀ < 10 s (NDIR) |
| Principle | Non-Dispersive Infrared (NDIR) Spectroscopy |
Overview
The CUBIC INSTRUMENTS Gasboard-3110P is a field-deployable, battery-powered natural gas calorific value analyzer engineered for high-reliability, real-time quantification of key combustible components and energy content in pipeline natural gas, coalbed methane, biogas, and associated gas streams. It employs proprietary dual-beam non-dispersive infrared (NDIR) spectroscopy with thermopile detection and temperature-compensated optical path design to deliver simultaneous, interference-free measurement of methane (CH₄), carbon dioxide (CO₂), and total hydrocarbons (CnHm, expressed as propane-equivalent concentration). Unlike conventional combustion-based calorimeters or GC-based systems, the Gasboard-3110P calculates gross calorific value (GCV) and net calorific value (NCV) in real time using ASTM D3588-17 and ISO 6976:2016-compliant empirical algorithms embedded in firmware—requiring no external calibration gases beyond zero air during routine operation.
Key Features
- Simultaneous multi-component analysis: Measures CH₄, CO₂, and CnHm (C₁–C₅ hydrocarbons) in a single pass with cross-sensitivity < 0.5 % FS between CH₄ and CnHm channels—validated per IEC 62453-3-2 functional safety requirements for gas sensing.
- Calorific value computation: Onboard calculation of GCV (MJ/m³ at 15 °C, 101.325 kPa) and Wobbe Index per EN 437 Annex B, eliminating need for separate bomb calorimetry or flame ionization reference instruments.
- Rugged portable architecture: IP54-rated enclosure with integrated sampling pump, pressure-regulated flow control (0.7–1.2 L/min), and inlet filtration (3 µm particulate + desiccant cartridge optional) for direct field use in metering stations, compressor skids, and LNG loading terminals.
- Intelligent power management: Rechargeable Li-ion battery (≥8 h continuous operation at 25 °C), soft-start circuitry, low-voltage lockout, and real-time state-of-charge display via backlit LCD interface.
- Maintenance-free operation: No consumables, carrier gases, or chemical reagents required; NDIR optical modules rated for ≥15,000 hours MTBF under continuous duty per MIL-HDBK-217F predictions.
Sample Compatibility & Compliance
The Gasboard-3110P accepts dry, particle-free, oil-free sample gas within specified pressure (2–50 kPa gauge) and flow (0.7–1.2 L/min) envelopes. Optional inline coalescing filter and Peltier-cooled condensate trap enable stable operation with raw biogas (up to 60 % RH). All measurements comply with ISO 8573-1:2010 Class 4 for compressed air quality and meet electromagnetic compatibility (EMC) requirements per EN 61326-1:2013 for industrial environments. Data integrity adheres to ALCOA+ principles—audit trails, user authentication, and electronic signatures support GLP/GMP-aligned workflows where applicable.
Software & Data Management
Internal memory stores up to 10,000 timestamped records (date/time, CH₄%, CO₂%, CnHm%, GCV, NCV, ambient T/P). Data export is supported via RS-232 serial interface (ASCII protocol, Modbus RTU optional) for integration into SCADA, DCS, or centralized gas quality monitoring platforms. Firmware supports remote updates and diagnostic logging; self-test routines verify detector stability, optical alignment, and pump performance prior to each measurement cycle—meeting FDA 21 CFR Part 11 requirements for electronic records when used with validated host software.
Applications
- Natural gas distribution: Real-time verification of gas interchangeability at city gate stations and regional blending points.
- Coalbed methane (CBM) and landfill gas upgrading: Monitoring hydrocarbon composition pre- and post-scrubbing to optimize membrane/PSA system efficiency.
- Appliance certification labs: Verification of fuel specification compliance per ANSI Z21.1 and EN 437 for domestic and commercial burners.
- Energy auditing & regulatory reporting: Field validation of billing-grade calorific values per ISO 15971 and national gas code mandates.
- Research & development: Rapid screening of syngas, biomethane, and hydrogen-blended natural gas mixtures in pilot-scale reforming and methanation studies.
FAQ
Does the Gasboard-3110P require periodic calibration with certified gas standards?
Yes—zero calibration with nitrogen or synthetic air is recommended before each daily use; span calibration with certified CH₄-in-air (e.g., 50 % vol) and CnHm standard (e.g., 5 % vol propane) is advised every 30 days or after exposure to high-concentration samples.
Can it measure hydrogen (H₂) content in natural gas blends?
No—H₂ is not detectable by NDIR in this configuration. For H₂-rich streams, pairing with an optional electrochemical H₂ sensor module (Gasboard-3110P-H₂ add-on) is available.
Is the instrument suitable for permanent installation in hazardous areas?
The base unit is rated for non-hazardous locations only (Class I, Division 2 not certified); explosion-proof enclosures or intrinsically safe barriers must be externally provided per ATEX/IECEx requirements.
How does the analyzer handle water vapor interference in raw biogas?
Built-in silica gel desiccant cartridge reduces dew point to < −20 °C; for sustained operation above 80 % RH, integration with a chilled mirror dew point controller upstream is recommended.
What data security protocols are implemented for remote transmission?
RS-232 communication is unencrypted by default; TLS 1.2 encryption and certificate-based authentication are supported when interfaced via optional Ethernet-to-serial gateway running CUBIC’s SecureLink firmware.
