Model 959 Manual Mass-Spectrometer Leak Detector

The Varian, Inc. Model 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.

The unit is fully protected against accidental air-inrush and power failure. The high-vacuum pump, a Varian, Inc. Turbo-V70D MacroTorr Turbopump, enables testing at high pressures, up to 1 torr, without needing a throttle valve. The Contra-Flow™ design of the vacuum system helps to keep the spectrometer clean, with no need for liquid nitrogen.

The Model 959 Leak Detector 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.