Agilent Varian Leak Detector Sniffer Probe, KF25 for VS Helium Mass Spectrometer Leak Detectors, 10ft.,Keysight 4339A High Resistance Meter with 04339-60003 - Global Test Equipment,Electronic GC Leak Detector (Hydrogen, Nitrogen, Helium) | Agilent,Crystal Engineering HPC40 (HPC41/ HPC42) Series Pressure Calibrator, Up to 15000 PSI - Calright Instruments