On-line Coal Gas Analyzer KGD-MQ-521
The On-line Coal Gas Analyzer KGD-MQ-521 is used for online measurement of gas volume concentration. This advanced analyzer adopts non-dispersive infrared (NDIR) gas analysis technology with independent intellectual property rights, long-life electrochemical sensing technology, and MEMS-based thermal conductivity technology.
Product Features
- Simultaneous measurement: Measures gas components and calorific values simultaneously, including CO, CO₂, CH₄, H₂, O₂, and CₙHₘ, automatically calculating and displaying calorific values
- High measurement accuracy: No cross-interference among multi-component gases; CₙHₘ has no interference on CH₄ measurement, and CO, CO₂, and CH₄ have no interference on H₂ measurement
- Automated operation: Equipped with professional pre-treatment solution, digital and analog output functions, enabling real-time online monitoring without manual operation
- Stable performance: Constant-temperature sensor design eliminates ambient temperature influence; corrosion-resistant materials ensure long service life
Technical Parameters
| Measurement Component |
CO/CO₂/CH₄/H₂/O₂/C₂H₂/C₂H₄/CₙHₘ*/Calorific Value |
| Measurement Principle |
CO/CO₂/CH₄/C₂H₂/C₂H₄/CₙHₘ: NDIR; H₂: TCD; O₂: ECD |
| Measurement Range |
CO/CO₂/CH₄/H₂: (0~100)%; O₂: (0~25)%; C₂H₂/C₂H₄/CₙHₘ: (0~10%) (Optional) |
| Measurement Accuracy |
CO/CO₂/CH₄/H₂: (0~100)±0.25%; C₂H₂/C₂H₄/CₙHₘ: (0~10)±0.25% (Optional) |
| Linear Error |
CO/CO₂/CH₄/C₂H₂/C₂H₄/CₙHₘ: ±1%F.S.; O₂/H₂: ±2%F.S. |
| Resolution |
0.01% |
| Repeatability |
≤1% |
| Response Time |
T90<15s (NDIR) |
| Optimal Flow Rate |
(0.7~1.2) L/min |
| Inlet Gas Pressure |
(2~50) kPa |
| Gas Requirements |
Dust-free, water-free, oil-free |
| Communication |
RS-485/RS-232, (4-20) mA |
| Power Supply |
100~240VAC, 100W |
| Display |
LCD |
| Functional Configuration |
Built-in zero-adjustment air pump, automatic air zero-adjustment, calorific value units switching, self-diagnosis function, online sensor status check |