The Agilent 959 MacroTorr Helium Leak Detector is rugged and dependable tool for finding and measuring leaks in the most demanding applications. With its low initial price and low cost of ownership, this unit is the most cost-effective leak detector available. We have designed it to use a large, externally mounted primary pump, which results in high roughing speeds and fast pumpdown times. It may be purchased as a standalone unit (with the primary pump purchased separately) or in combination with either an oil-sealed rotary-vane pump or a TriScroll dry pump. The combinations are available either with hardware for bench mounting or already mounted on a two-wheel cart.