Profile: MKS Instruments, Inc specializes in offering instruments, subsystems & process control solutions that measure, control, power, monitor & analyze critical parameters of advanced manufacturing processes to improve process performance and productivity. Our products include control systems, custom vacuum fabrication, flow measurement, control & verification, leak detection, plasma sources, pressure/vacuum control, RF & DC power, vacuum chambers & gauges and valve products. PICO® helium leak detectors are the smallest and lightest mass-spectrometer-based leak detectors. Its sniffing-style and vacuum leak detectors provides portable leak detection. This helium leak detectors are the most compact, lightweight and portable mass spectrometer-based helium leak detection instruments available. They are fast, contamination-free leak detectors, with a design that incorporates patented mass spectrometry and vacuum technology.