Nutech 6300 Online THC & NMHC Monitoring System
The Nutech 6300 Online THC & NMHC Monitoring System is designed for continuous monitoring of Total Hydrocarbons (THC), Methane (CH4), and Non-Methane Hydrocarbons (NMHC) in ambient air and fence-line monitoring applications.
Based on FID detection, the system provides sensitive and stable measurement of low-level hydrocarbons, with a detection limit of 5 ppbC for NMHC and 100 ppbC for CH4. Each analysis can be completed in less than 15 minutes, making the 6300 suitable for long-term automated monitoring in environmental monitoring stations, industrial parks, third-party laboratories, research institutes, and other air quality monitoring scenarios.
The system can be configured with the Nutech 2207 Precision Dynamic Dilutor, zero air generator, and hydrogen generator to form a complete online monitoring solution. With automated sample analysis, calibration sequence control, chromatogram processing, historical data query, and trend display, the Nutech 6300 helps users build a reliable and practical workflow for THC, CH4, and NMHC monitoring.
Key Features of Nutech 6300
1. Continuous Monitoring of THC, CH4, and NMHC
The Nutech 6300 is designed for continuous hydrocarbon monitoring, measuring THC, CH4, and NMHC in ambient air or fence-line environments. It is suitable for routine environmental monitoring, industrial boundary monitoring, research applications, and third-party testing laboratories.
2. FID Detection for Reliable Hydrocarbon Analysis
The system uses Flame Ionization Detection (FID), a well-established detection method for hydrocarbon measurement. FID provides strong response to hydrocarbons and is widely used for air quality and VOC-related monitoring applications.
3. Low Detection Limit for Trace-Level Monitoring
With a detection limit of 5 ppbC for NMHC and 100 ppbC for CH4, the Nutech 6300 is suitable for low-concentration ambient air monitoring and applications where trace-level hydrocarbon changes need to be captured.
4. Fast Analysis Cycle
The system completes each analysis in less than 15 minutes, supporting near-real-time trend tracking and long-term unattended monitoring.
5. Good Precision and Accuracy
The Nutech 6300 provides RSD below ±2% and accuracy within ±5%, helping laboratories and monitoring stations obtain consistent and defensible data for routine monitoring programs.
6. Automated Calibration with Optional 2207 Dynamic Dilutor
When paired with the Nutech 2207 Precision Dynamic Dilutor, the system can automatically switch between different standard gas concentrations and control the standard gas supply. This supports automated calibration workflows and reduces manual operation.
7. Inert, Heated, and Humidified Flow Path Design
The optional 2207 diluter uses inert-treated internal pipelines and fittings, with heating and humidification functions to help reduce sample loss, contamination, and adsorption. This helps improve sample representativeness, especially for low-level monitoring.
8. Integrated Software for Operation, Calibration, and Data Review
The operating software supports sequence setup, sample analysis, chromatogram review, standard curve fitting, data export, historical data query, and concentration trend display for THC, CH4, and NMHC. Users can manage both routine analysis and calibration from one software platform.
9. Multiple Data Output Interfaces
The system supports 4–20 mA, 0–5 V DC, and RS232 data interfaces, making it easier to integrate with online monitoring platforms, data acquisition systems, and environmental monitoring networks.
10. Complete System Configuration Available
The Nutech 6300 can be configured as a complete online monitoring system with the 6300 analyzer, 2207 precision dynamic diluter, zero air generator, hydrogen generator, computer, and system cabinet. This allows users to deploy a practical turnkey solution for online THC, CH4, and NMHC monitoring.
Test Performance in Certification
data from 3rd party testing lab
| Parameter | Criteria | NCMS250102 | NCMS250103 | NCMS250105 | Compliance | |
| Analysis Time | ≤15 min | 12:52 | 12:30 | 12:36 | Pass | |
| Detection Limit | ≤20 nmol/mol | 4.9 | 3.4 | 2.89 | Pass | |
| Blank Value | ≤10 nmol/mol | 3.9 | 2.7 | 2.8 | Pass | |
| High Concentration Residual | ≤40 nmol/mol | 4.2 | 3.4 | 3.5 | Pass | |
| Indication Error | 20% FS | ±5% | 0.09% | 0.19% | 0.95% | Pass |
| 80% FS | ±3% | -0.49% | -0.18% | -0.07% | Pass | |
| Precision | 20% FS | ≤2% | 0.64% | 0.13% | 0.28% | Pass |
| 80% FS | ≤2% | 0.11% | 0.10% | 0.13% | Pass | |
| Humidity Influence | ±5% | 1.54% | -0.08% | 1.01% | Pass | |
| Sample vs Calibration Port Deviation | ±5% | -0.30% | -0.05% | -0.13% | Pass | |
| 24-hour Drift (20% FS) | ±5% | -1.00% | 0.52% | -0.69% | Pass | |
| 24-hour Drift (80% FS) | ±3% | 0.42% | -0.28% | -0.34% | Pass | |
| 7-day Drift (20% FS) | ±5% | 0.63% | -0.87% | 0.77% | Pass | |
| 7-day Drift (80% FS) | ±3% | 0.49% | -0.51% | 0.27% | Pass | |
| Inter-instrument Parallelism | ≤2% | 1.10% | Pass | |||
| Data Validity Rate (30 Days) | ≥85% | 100% | Pass | |||
Chromatogram
Recommended Configuration for Complete Monitoring System
Besides the analysis unit (6300 THC & NMHC analyzer), Nutech can offer the whole THC & NMHC continuous monitoring system including the sampling unit, the analysis unit, the data collection and transmission unit, quality control unit, gas source unit and other auxiliary products.
| Item | Model | Note |
| Sampling Unit | ||
| Sampling Tube (with heat tracing) | NST100 | Standard and Customizable. |
| Analysis Unit | ||
| NMHC Analyzer | 6300 | Standard, LTP+FID. |
| Data Collection & Transmission Unit | ||
| Computer/IPC | IPC-610 | Standard |
| Data Collection Unit | N6300 V1.0 | Standard |
| Quality Control Unit | ||
| Standard Gas (Methane/Propane) | NSG-CH4/C3H8 | Standard. Can be purchased locally. |
| Gas Source Unit | ||
| High Purity Hydrogen Generator | NHG300 | Standard. |
| Zero Air Generator | NAG1000 | Standard. |
| High Purity Nitrogen | NG-N2 | Standard. |
| Other Auxilliary Equipment | ||
| Meteorological Sensor | NTPL100 | Optional. |
| Cabinet | N6837 | Optional. Customizable. |
This table is the list of standard configuration of NCMS 6300 THC & NMHC continuous monitoring system recommended by Nutech, which can be customized according to customer’s requirements.
Nutech 6300 Onsite Pictures
