The Flow Measurement Element is a primary sensing component used in flow measurement systems. It physically interacts with the fluid stream and converts flow characteristics into measurable mechanical, electrical, or optical signals. These signals are processed to determine flow rate, volume, or mass. The element serves as the interface between the fluid medium and the measurement instrumentation, providing raw data for accurate flow quantification. Common operating principles include differential pressure generation across a constriction (e.g., orifice plates, venturi tubes), mechanical displacement of moving parts (e.g., turbine rotors, paddle wheels), thermal transfer measurement (thermal mass flow sensors), electromagnetic induction (magnetic flow meters), and ultrasonic signal modulation. The specific design determines which physical property is measured and converted into a quantifiable signal. Materials on file include stainless steel, Hastelloy, titanium, ceramic, and PTFE. Reference parameters include nominal diameter (15–300 mm per ISO 6708), flow range (0.1–1000 m³/h), accuracy (±0.5–±2.0% full scale or reading per ISO 5167), repeatability (±0.1–±0.5%), operating temperature (-40–200 °C), operating pressure (1.0–16 MPa), pressure loss (10–100 kPa at max flow), material (316L per ASTM A240), process connection (DN15–DN300 per EN 1092-1), and weight (1.5–250 kg). These values are directory references and must be confirmed for the specific model and application. Always verify model-specific values and standards with the legal manufacturer or supplier.
The Flow Measurement Element operates by interacting with fluid flow to produce a measurable response. Common principles include: 1) Differential pressure generation across a constriction (orifice plates, venturi tubes), 2) Mechanical displacement of moving parts (turbine rotors, paddle wheels), 3) Thermal transfer measurement (thermal mass flow sensors), 4) Electromagnetic induction (magnetic flow meters), or 5) Ultrasonic signal modulation. The element's design determines which physical property is measured and converted into a quantifiable signal.
