Flow Controllers & Flow Meters

Flow Meters measure the rate or quantity of a fluid (liquid or gas) passing through a system. Common types include:

• • Thermal Mass Flow Meters: Ideal for gas flow measurement using heat transfer principles.
• • Differential Pressure (DP) Meters: Use orifice plates or venturis with pressure drop to infer flow.
• • Turbine Flow Meters: Measure velocity via a rotating turbine; good for clean liquids.
• • Ultrasonic Flow Meters: Non-invasive; use sound waves to determine flow velocity.
• • Coriolis Meters: Direct mass flow measurement; highly accurate for liquids and gases.

Flow Controllers regulate fluid flow to a desired setpoint. Typically integrate a sensor, control valve, and PID controller.

• • Mass Flow Controllers (MFCs): Precisely control gas flow in semiconductor, lab, and process systems.
• • Proportional Valves: Adjust flow proportionally based on input signal (e.g., 0–5 V or 4–20 mA).

Key Parameters Include: Full-scale range, accuracy, response time, media compatibility, and signal output.