NWSPEC
P5 Rack GC for Continuous VOCs Monitoring
P5 Rack GC for Continuous VOCs Monitoring
P5 Rack GC for Continuous VOCs Monitoring
19" Rack-Mounted Continuous Ambient Air Analyzer | NWSPEC GC Accessory Series
The P5 is a process-grade rack-mounted GC system designed for continuous 24/7 monitoring of C2-C12 organic pollutants in ambient air. With ppt-level sensitivity, dual-stage enrichment, and full regulatory compliance (EU, EPA, China HJ), it serves as both a standalone air monitoring station and an integrated process control accessory for emissions management.
Regulatory Compliance
Process GC Applications
- Ambient air quality monitoring stations
- Industrial emission continuous monitoring
- PAMS (Photochemical Assessment Monitoring Stations) C2-C12
- NMHC (Non-Methane Hydrocarbon) tracking
- BTEX (Benzene, Toluene, Ethylbenzene, Xylene) surveillance
- Aliphatic hydrocarbon profiling
- Chlorinated hydrocarbon detection (vinyl chloride, etc.)
- THC (Total Hydrocarbon) measurement
- Process plant perimeter monitoring
- Urban air quality network nodes
System Features
- ppt-level sensitivity: Detection limit <0.1ppb for PAMS C2-C12 compounds
- Dual-stage enrichment: Pre-concentration module for ultra-trace VOCs
- Wide carbon range: C2-C12 + custom VOC compounds configurable
- Built-in dilution: D2200 system for 0.1ppb calibration from 1ppm cylinder
- Mass flow control: Built-in MFC and sampling pump for enrichment
- Compact column oven: Ambient to 400°C programmable, fast cool-down
- Multi-detector ready: Up to 3 detectors mountable (FID standard)
- EPC control: Electronic pressure controllers for all gas paths
- Built-in industrial PC: 12.1" touchscreen with pre-installed workstation
- 7×24 automation: Automatic running, calibration, and bake-out
- Standard protocols: MODBUS, Profibus, 4-20mA, RS485/232, TCP/IP
- Remote access: Web browser control with IoT connectivity
- VPN support: Secure remote diagnostics and updates
- Data output: Excel, PDF, TXT formats with built-in calculation tools
- Raw data encryption: Secure data integrity
- Chromatogram overlay: Trend comparison and historical analysis
- GPS integration: Location tagging available upon request
- Water removal: Patented cooling + Nafion tube dual system
- Deans switch: Low-mass system for heart-cutting analysis
- H2 safety: Automatic shut-off when FID flame extinguishes
System Specifications
| Mounting: | 19" rack, 8U height |
| Height / Depth: | 8U, 670 mm |
| Weight: | ~55 kg |
| Power Supply: | 100-240VAC, 50-60Hz |
| Max Power: | 900W |
| Operation Temperature: | 0°C to 40°C |
| Sample Range: | C2-C12 + custom VOCs |
| NMHC / THC: | Supported |
| Pre-concentration: | Thermal desorption dual-stage |
| Column: | Fused silica capillary with Deans switch |
| Oven Temperature: | 40°C to 350°C |
| Heating Rate: | 1-40°C/min (0.1°C/min resolution) |
| Carrier Gas: | H2/N2 (default: H2 @ 5 bar, GC grade) |
| EPC Resolution: | 0.001 psi |
| Detector: | FID (Flame Ionization Detector) |
| LDL (PAMS C2-C12): | < 0.1 ppb |
| LDL (NMHC): | < 50 ppb |
| Linearity: | > 10⁷ (±10%) |
| Repeatability (Area): | < 1.5% (benzene at 1 ppb) |
| Repeatability (RT): | < 0.1% (24hr, benzene) |
| Sampling Pump: | Built-in diaphragm pump |
| Sampling Flow: | 2-120 ml/min (MFC controlled) |
| Sampling Time: | 0-150 min adjustable |
| Enrichment Temperature: | 0-10°C programmable |
| Desorption Temperature: | Max 380°C programmable |
| Heating-up Rate: | Max 120°C/s |
| Typical Sample Volume: | 200-1400 ml |
| Cooling: | Peltier |
| Sample Split: | Yes, programmable (low-mass system) |
| Touch Screen: | 10.8" or 12.1" |
| Software: | UniExpress |
| Calibration: | 7×24 automatic or manual |
| Data Output: | Excel, PDF, TXT, custom |
| Communication: | RS485, RS232, Ethernet×2, USB×3 |
| 4-20mA Output: | Max 255 channels |
| I/O Output: | Ready, alarm, error (configurable) |
| Tubing Connector: | 1/8" ferrule |
Compatible GC Accessories
Dynamic Calibrator
Thermodesorber
Tedlar Bag Sampler
Automatic Sample Vaporizer
System Integration: The P5 is designed as a complete air monitoring station in a 19" rack format. The built-in D2200 dilution system enables automated calibration from 1ppm cylinders down to 0.1ppb—essential for ppt-level accuracy validation. When paired with the D2 dynamic calibrator, it achieves fully unattended 7×24 operation with automatic drift correction. All data exports via MODBUS/Profibus to SCADA or environmental data platforms.
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