PyxisGC BTEX is the first and unique gas chromatograph “carrier gas free” for remote BTEX monitoring in ambient air. PyxisGC BTEX can measure those compounds thanks to the MEMS (Micro Electro-Mechanical Systems) pre-concentrator, GC separation column, based on a proprietary silicon micromachined chip and the miniaturized Photoionization detector (PID) that quantifies the peaks.