Agilent, G1535-60720, FPD EPC module, used with series 6850 (model 6850B) and 6890 gas chromatography systems

The Agilent flame photometric detector electronic pneumatic control module is a replacement gas-flow assembly for selected 6850B and 6890 gas chromatographs fitted with a flame photometric detector. Flame photometric detection uses wavelength-selective optical emission from a detector flame and is commonly configured for sulfur- or phosphorus-responsive methods. Stable detector gas delivery and controlled flame conditions are important for sensitivity, repeatability and safe operation. This EPC module serves the detector pneumatic system; it is not the optical filter, photomultiplier, burner assembly or the entire flame photometric detector. Confirm the detector version and installed flow module before replacement because GC configurations and service generations differ. Follow the instrument service procedure to isolate fuel and oxidant gases and power, then reconnect the gas lines without introducing debris or leaks. After installation, verify gas flows, ignition, leak integrity and detector response. Use appropriate sulfur or phosphorus calibration checks for the application. Internal FPD pneumatic maintenance should be performed by personnel familiar with detector gas safety.