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Sierra Flow Measurement and Control Division designs and manufactures high precision capillary-sensor based Mass Flow Meters and Controllers for gas flow applications. 
Sierra also designs and manufactures 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.
The 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.
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