Process Gas Monitor (Qulee) “Qulee” is ULVAC’s latest model for residual gas analysis and monitoring. The ULVAC Qulee achieves highly accurate measurements with high resolution even at a high pressure (1Pa) order the simple (easy) to use Qulee today. Qulee CGM2 Series Qulee RGM Series Qulee BGM2 Series Software QCS Ver4.0 Qulee HGM Series Qulee with YTP-H Series