Mass flow meters & controllers     leak detector    residual gas analysis     vacuum measurement    vacuum components        Asia Pacific     Europe     America         ADVANCED ENERGY INDUSTRIES, INC. - www.advanced-energy.com - 1625 Sharp Point Drive, Fort Collins, CO 80525, USA email, Tel. 800 446 9167 AE focuses on high-growth applications, including solar cell, passive-solar architectural glass, solar grid-tie inverter, semiconductor, flat panel display, data storage, and other advanced processes. AE's product portfolio includes precise, flexible electrical power systems, reliable gas and liquid flow-management systems, accurate thermal instruments, and global support services. Products:   Flow management Thermal-based Mass Flow Controllers Thermal-based Mass Flow Meters Pressure-Based Mass Flow Controllers LIQUID Mass Flow Controllers ROD4-A Mass Flow Control Unit Exhaust Pressure Controllers Material Delivery Systems Alicat Scientific, Incorporated - www.alicatscientific.com - 7641 N. Business Park Drive, Tucson, AZ 85743, USA email, Tel. (888) 290 6060 Products:   Mass flow meters, mass flow controllers Apex Vacuum - www.apexvacuum.com - 222 Riverstone Drive, Canton, GA 30114, USA email, Tel. 770-479-7158 Products:   Mass Flow Controllers and Meters, Battery Powered Mass Flow Meter Power Supply and communication Cables, FlowVision Software for MFC/MFM Pressure Controllers, Vacuum/Pressure Gauges Sierra Instruments, Inc. - www.sierrainstruments.com - 5 Harris Court Building L, Monterey, CA 93940, USA email, Tel. +1 831-373-0200 Founded in 1971 by Dr. John G. Olin, Sierra has long been well known as a manufacturer of high-performance fluid flow measurement and control instrumentation for use in numerous industries and applications throughout the world. Products:   Smart-Trak 2® + Compod™ Maintaining a specified gas mass flow rate to the vacuum cham­ber is critical during the PVD process. Typically, vacuum pumping stations require a throttle valve or orifice-limiting device to control the pump's output when the PVD gas is introduced. This method is extremely pressure sensitive and can result in inefficient gas delivery and poor product quality. Sierra's Smart-Trak 2 with Compod automatically com­pensates for changes in system pressure (vacuum pump fluc­tuations) or loss of pressure from the gas source (cylinder depletion). The Smart-Trak® 2 with Compod™ also delivers pre­cisely controlled gas mass flow rate to the vacuum chamber to maintain high quality end-product.     www.vacuum-guide.com     Keywords