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Sierra USA, located in the beautiful environment of Monterey, California, USA, is a globally renowned enterprise founded by Dr. Olin in January 1971. The companys main business covers the research and development, production, and customer service of Industrial Thermal, Capillary MFM/MFC, and Vortex Mass Flow Meter. Sierra, with its profound foundation in science and technology, gathers world-class professionals, and shapes a leading global brand image through advanced equipment, rigorous management, and excellent service. The company is headquartered in the United States and has branches in the Americas, Europe, and Asia. Its products are sold worldwide, with cumulative sales exceeding 500000 units. Sierras main product line includes thermal mass flow meters such as Souzhen and controllers, vortex street mass flow meters, and ultrasonic flow meters. Multiple innovative technologies are unique in the industry, such as automated benchmark flow calibration systems and vortex street mass flow meters, which are the worlds first. Sierras products have won multiple national awards in the United States, especially in the field of flow measurement. Its inventions and innovations, such as thermal mass flow meters with clean sensors and low-cost micro tube thermal mass flow meters, are groundbreaking achievements in the global industry. These products are widely used in internationally renowned enterprises such as US Steel Group, Dow Chemical Company, and POSCO in South Korea, and are also included in NASAs list of application equipment. In China, Sierras products have performed well in the application of large industrial enterprises such as petrochemicals, steel, and electricity, and have won wide recognition for their accurac
2. Other commonly used types of flow meters
Ultrasonic flow meters are instruments that measure flow by detecting the effect of fluid flow on ultrasonic beams (or ultrasonic pulses).
. According to the principle of signal detection, ultrasonic flow meters can be divided into propagation velocity difference method (direct time difference method, time difference method, phase difference method, and frequency difference method), beam offset method, Doppler method, cross-correlation method, spatial filtering method, and noise method. Ultrasonic flow meters, like electromagnetic flow meters, are unobstructed flow meters due to the absence of any obstruction in the instrument flow channel. They are a type of flow meter suitable for solving difficult flow measurement problems, especially in large-diameter flow measurement, and have outstanding advantages. They are one of the rapidly developing types of flow meters. Advantages:(1) Can be used for non-contact measurement;
(2) is a measurement without flow obstruction and pressure loss; (3) It can measure non-conductive liquids and is a supplement to electromagnetic flow meters for unobstructed measurement. Disadvantages:
(1) The propagation time method can only be used for cleaning liquids and gases; The Doppler method can only be use