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Gas Chromatograph

GC7900 Gas Chromatograph

7900 GC is the latest model of gas chromatograph developed by Techcomp, with
compact design and outstanding performance

  • 7900 has 9-step temperature program, with maximum heating rate up to 39 C per minute
  • Three injection ports and three detectors can be mounted at the same time
  • Large LCD screen displays all operating conditions and detection signals
  • Built-in data acquisition board to control 7900 gas chromatography and perform data analysis by PC through RS232 interface.
  • Gas pressure is controlled and regulated by the latest advanced technology to ensure accuracy down to 0.1psi.
  • Choice of injection port - Packed column, split/ splitless capillary and wide bore capillary column adaptor.
  • Choice of detector - FID, TCD, ECD, NPD, FPD.
  • D -7900 PC software is a standard with the main unit. The software can perform instrument control, data acquisition, chromatogram manipulation, data analysis and calculation as well as custom reporting.
  • Injections can be automated by optional liquid autosampler.
Operating Environment
Temperature range 5°C to 35°C
Humidity range 25% to 80% (non-condensing)
Power supply 220V ±10%, 50Hz
Power consumption 2500W
Column Oven
Dimension 250 x 250 x 176 mm
Dimension Ambient+5°C to 399°C
(increment of 1°C)
Temperature accuracy 0.5%

Ramp rate
(Temp ≤ 200°C)
(Temp > 200C)
Max no of ramp 9
Reproducibility of
temperature ramping
PC connection RS-232, 9600 baud rate
Analog output RS-232, 9600 baud rate
Injection Port
Display of column
pressure and flow rate
Display of column pressure 0.1psi
Display of flow rate 1ml/min
Control of column
pressure and flow rate
Manual control with flow stabilizer
Temperature control (max) 399°C (increment of 1°C)

No of injection ports
3 (max)
Packed column injector
Wide bore capillary column adaptor
Capillary column injector
Temperature control (max) Temperature control (max)
350 C for TCD, ECD