GC8690A Gas Chromatograph

Main technical specifications

1. Main unit.
♦ Display :7-inch LED screen
♦ Temperature Control: Zones: 8 channels
♦ Motor system: Variable frequency motor
• Range: 5°C above ambient to 450°C Increment: 1°C | Accuracy: ±0.01°C
• Programmable heating steps: 32 steps/33 platforms
♦ Ramp rates:Standard: 0.1–40°C/min High-speed: 0.1–60°C/min
♦ Injection Systems :Packed column injection .Capillary column injection
♦ Detectors:Maximum configurable: 3 detectors. Optional types: FID, TCD, ECD, FPD, NPD, PDHID

2. Gas Path Control: Electronic Pressure Control (EPC)
♦ EPC modes:
• Constant temperature
• Constant pressure
• Programmable pressure increase
• Programmable flow increase
• EPC ranges:
  Pressure: 0–0.6 MPa
  Flow rate: 0–100 mL/min or 0–500 mL/min (air)
♦ Pressure Sensor
• Accuracy : <±2% FS Repeatability : <±0.05 kPa
• Temperature coefficient: <±0.01 kPa/°C
♦ Communication Interfaces : Ethernet (LAN) .RS-232 serial port
♦ Power Supply : 220V±10%, 50Hz. Max power: 2500W
♦ Dimensions & Weight: 620×540×540 mm (W×D×H), 50Kg

3. Detectors：

(1) Flame Ionization Detector (FID)
♦ Detection limit: Mt ≤3×10⁻¹² g/s (n-hexadecane in isooctane)
♦ Noise: ≤5×10⁻¹⁴ A
♦ Drift: ≤1×10⁻¹³ A/30min
♦ Linear range: ≥10⁶

(2) Thermal Conductivity Detector (TCD)
♦ Sensitivity: Standard: S≥3500 mV·mL/mg. High-sensitivity: 5000 mV·mL/mg (benzene-toluene)(Amplification options: 2×, 4×, 8×)
♦ Noise: ≤10 μV
♦ Baseline drift: ≤30 μV/30min
♦ Linear range: ≥10⁴

(3) Electron Capture Detector (ECD)
♦ Radiation source: 63Ni
♦ Detection limit: ≤1×10⁻¹⁴ g/s
♦ Noise: ≤0.03 mV
♦ Baseline drift: ≤0.2 mV/30min
♦ Linear range: ≥10³

(4) Flame Photometric Detector (FPD)
♦ Detection limits:Sulfur (S): ≤5×10⁻¹¹ g/s ,Phosphorus (P): ≤1×10⁻¹² g/s
♦ Noise: ≤0.03 mV
♦ Baseline drift: ≤0.2 mV/30min
♦ Linear ranges: S: ≥10³ P: ≥10²

Main technical features

1. 6th-generation high-precision EPC gas flow control.
2. Built-in one-touch factory calibration.
3. Ultra-quiet variable frequency motor system.
4 Bluetooth data transmission & control.
5. Intelligent programmed temperature control.
6. Rapid column oven heating/cooling system.
7. Network-controlled data processing.
8. Bilingual OS (Chinese/English selectable) with intuitive 7" color LED interface.
9. 10/100M adaptive Ethernet port with built-in IP stack for LIMS connectivity.
10. Smart IoT-enabled monitoring with hierarchical data access.
11. Proprietary DOTHUNET Workstation: Supports 300 simultaneous GC units.Industry-leading data processing & remote control.
12. Built-in Modbus/TCP server for DCS integration15.
13. Modular design for easy upgrades & low maintenance
14. FID Autopilot: Automatic ignition/relight & gas path control
15. Programmable timed startups for online analysis (accessories required)
16. Auto-sampler ready: Pre-installed drivers.Supports fluid multi-position autosamplers (limited)
17. External sample prep compatibility: Headspace sampler. Gas sampler.Thermal desorber.
18. Valve systems: Configurable control valves. Digital valve options.