Vacuum Manual Mass-Spectrometer Leak Detector 

The Agilent Model 959 MacroTorr Helium Leak Detector provides rugged and dependable leak detection and measurement and is the most cost-effective leak detector available. The Contra-Flow design keeps the spectrometer clean, with no need for liquid nitrogen. The large, externally mounted primary pump provides high roughing speeds and fast pumpdown times. The leak detector can be purchased as a standalone unit (with primary pump purchased separately) or in combination with either an oil-sealed rotary-vane pump or a TriScroll dry pump. Both bench-mount and cart hardware are available.