Experience Sierra!

Our Mission: To be the leading manufacturer of (mass) flow meters, (mass) flow controllers, and partial flow sampling systems in the world in terms of quality, delivery, price, innovation, and customer support.

Founded in 1971 by Dr. John G. Olin, Sierra Instruments is well known as " The Mass Flow Company " and manufactures high-performance mass flow meters and controllers for use in numerous industries and applications throughout the world. Sierra is one of the most trusted manufacturers of high performance flow meters and controllers today. In addition to being a flow specialist, in 1990 Sierra founded its fast growing “Emissions Systems” group which specializes in engine particulate emissions measurement and is known worldwide for its flagship BG-3 technology.

By combining superior product quality with a talented global support network of experts in over 150 locations in over 50 countries, Sierra consistently delivers quality measurement solutions for each customer and supports customers for the life of the product.

Our Thermal Mass, Transit-Time Ultrasonic, Vortex Shedding and Multivariable flow instruments 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 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, experience why customers around the globe rely on Sierra.

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