Agilent Technologies 959D Helium Leak Detector, PTS 300 Dry Scroll Pump, Mobile Cart, 220 V, D9593500TM220

The Agilent Technologies / Varian Models 959 and 959D are portable, self-contained mass spectrometer helium leak detectors using respectively dry and wet (oil-based) vacuum roughing pumps. The dry pump in the 959D makes the system particularly useful in clean room environments where a wet, oil-based pump cannot be tolerated. The pumps have identical operating characteristics, although the 959D is somewhat heavier. The wet pump meets most mechanical vacuum pumping needs, except in clean room applications.

The systems provide clean and automatic leak detection utilizing the Contra-Flow™ vacuum system design that allows testing at high test point pressures. The 959D provides a dry, oil-free vacuum pumping system. The TriScroll dry roughing pump evacuates the test port to the appropriate transfer pressure and provides ultra-clean system roughing and backing functions. The DS-302 high vacuum mechanical pump in the 959 provides the same functions in situations where the oil-free aspects of the 959D are not required. A Varian Turbo pump is used to achieve very high vacuum in the spectrometer tube. The roughing pump is located on the cart below the leak detector. An optional power probe accessory allows the leak detector to operate as a quick-response, high-sensitivity sniffing leak detector.