Founded in 1973 by Dr. John G. Olin, venture within Sierra and experience our passion for innovation and precision measurement and control. It was Dr. Olin’s dream that Sierra be built on innovation, creative opportunity, entrepreneurial spirit, and team camaraderie. We are proud to continue those traditions today. Discover our culture – a family-owned, open atmosphere for interaction that emphasizes individuality, respect, growth, and strong customer relationships.

With more than 150 locations in over 50 countries, our Flow Measurement and Control Division is known for the design and manufacture of innovative high-performance fluid flow measurement and control instrumentation for nearly any gas, liquid and steam application spanning across global industries as diverse as scientific research, semiconductor, wastewater treatment, iron and steel, clean energy, aerospace and biotech to name a few.

Our Flow Measurement and Control Division designs and manufactures high precision capillary-sensor based Mass Flow Meters and Controllers for gas flow applications. We also design and manufacture Immersible Thermal Mass, Transit-Time Ultrasonic, Vortex Shedding and Multivariable flow instruments in both standard and customized versions for applications in industrial and hazardous environments.

Our technologies precisely measure and/or control very low flows of gas 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 worldwide team of flow experts, we know you will “Experience Our Passion for Flow.”