The Differential Pump System by Granville-Phillips® extends the vacuum pressure range of the award-winning, high performance Vacuum Quality Monitor (VQM™) to address the needs of process monitoring and process control applications at pressures up to 3 Torr. All the benefits of the VQM, including speed and ease of use, can now be used to optimize PVD, ion implant, coating, and other vacuum processes to increase productivity, improve results, and save money.