Carbon dioxide analyzer Gasboard-9021

COCH4H2

Product overview
Gasboard-9021 is an online tri-gas analyzer for real-time measurement of CO, CO2 and CH4 in heat-treatment furnace atmospheres. Based on temperature-controlled Non-Dispersive Infrared (NDIR) sensors, the system delivers stable, low-drift measurements suitable for continuous process monitoring, furnace atmosphere diagnosis and carbon potential calculation. The analyzer output can be cross-checked against oxygen probe data to provide independent verification of atmosphere control. The unit supports CQI-9 requirements for automotive supply-chain atmosphere verification. An optional TCD module enables H2 measurement where hydrogen-bearing gases are present.

Features

• Stable NDIR tri-gas detection with temperature-controlled sensors for CO, CO2 and CH4 to minimize long-term drift.
• CQI-9 compliance for furnace atmosphere verification in heat-treatment process audits.
• Integrated sampling and conditioning system with modular design for simplified installation and maintenance.
• Optional H2 measurement via TCD module with interference-correction algorithms to avoid cross-sensitivity from CO/CO2/CH4.

Applications

• Carbon potential and atmosphere control in carburizing and other carburizing-related processes by monitoring CO, CO2 and CH4 concentrations.
• Process parameter optimization: in-furnace CO measurement to support COF/PF adjustments for precise carbon potential calculation.
• Furnace fault detection and diagnosis: detection of carbon deposition, water ingress, gas leaks and radiant tube failures through CO/CO2 trend analysis.

Technical specifications

• Measuring components: CO, CO2, CH4
• Measuring principle: NDIR
• Measurement range: CO2: 0-5000 ppm; CO: 0-30%; CH4: 0-10% (custom ranges available)
• Accuracy: ≤±2% F.S.
• Repeatability: ≤±1%
• Response time: <30 s
• Drift: ≤±2% F.S. / 2 month
• Resolution: CO2: 0.1 ppm; CO: 0.01%; CH4: 0.01%
• Inlet flow rate: 0.7 ~ 1.2 L/min
• Inlet gas pressure: 2 ~ 50 kPa
• Sampling gas condition: no dust, no vapor, no tar
• Operating power: AC110/AC220V ±40V, 50/60Hz
• Communication interface: RS-485 / RS-232
• Output mode: 4 ~ 20 mA output