Quasi-stop Flow Modulator QFM1200
QFM1200 is a new modulator for GCxGC based on quasi-stop flow modulation, a novel technique developed by our engineers. With occationally directing the inlet to the secondary column at constant frequency (modulation period), the primary flow rate is temperarily stopped (nearly) to allow a large secondary flow rate to flush the effluence of the primary column to the secondary column, achiveing GCxGC modulation.


  • No cryogens
  • Small size and low power consumption
  • Full volatility range (C1-C60, limited by GC)
  • No additional flow required (can be added for better flexibility)
  • Robust performance with no maintanence
  • Low cost
Lemongrass Oil
Excellent Repeatability and Reliability