... ECD, GC 122 -NPD and GC122-FPD, gas sampling valve, transformation oven Construction of dual gas path, dual sample ... glass, quartz glass,etcAccurate and scaled type steady flow valveregulator valve and needle valvein gas path control valves will provide ... tungsten wire, constant current source, differential amplifier circuit, micro-pool size. GC-122-ECDElectron capture detectorLimit of detection: ...