Sierra Instruments manufacturers high performance mass flow meters and mass flow controllers for nearly any gas, liquid, or steam application. Customers choose Sierra when they need an accurate and repeatable flow measurement, short delivery lead times, expert flow advice, and long term support. We provide innovative, high quality flowmeters and services to top businesses around the globe, helping them to achieve significant cost savings through increased efficiencies. When it matters, customers choose Sierra. By combining the superior quality of our flow meters and controllers with a talented global network of experts, we consistently deliver the best flow measurement solutions to our customers. Experience Our Passion for Flow! Our Thermal Mass, Transit-Time Ultrasonic, Vortex Shedding and Multivariable flow meters are available in both standard and customized versions for applications in laboratory, industrial, and hazardous environments. Sierra's flow measurement technologies precisely measure or control very low flows down to less than 1 sccm full scale as well as extremely high flows of gas, liquid, and steam. With rugged product design, cutting-edge innovation, and a team of flow experts Sierra Instruments comprises 107 offices worldwide in 47 countries. Experience why customers around the globe rely on Sierra.