Description
Product details
A paddle wheel flow sensor is a type of flow sensor used to measure the flow rate of a fluid, typically a liquid, within a pipe or a conduit. The sensor operates on the principle of a wheel or rotor with blades that rotate as the fluid flows through the pipe. The rotation of the paddle wheel is directly proportional to the flow rate, allowing for accurate measurement. Here's a breakdown of its components and operation: Paddle Wheel: The core component is a wheel or rotor with blades (paddles) attached to it. The paddle wheel is positioned in the flow path of the fluid within the pipe. Blades or Vanes: The blades or vanes of the paddle wheel extend into the flow of the fluid. As the fluid flows, it imparts a force on the blades, causing the wheel to rotate. Rotation Detection: The sensor has a mechanism to detect the rotation of the paddle wheel. This detection is typically achieved using magnetic, optical, or other sensing methods. Sensor Output: The rotation of the paddle wheel generates electrical signals or pulses. The frequency of these pulses is directly proportional to the flow rate of the fluid. Signal Processing: The electrical signals are processed by the sensor's electronics. The sensor converts the signal frequency into a flow rate reading. Output Signal: The flow sensor provides an output signal, often in the form of a pulse train or an analog signal, representing the flow rate. Display or Transmission: The flow rate information can be displayed locally on the sensor or transmitted to a central control system. Digital displays or communication interfaces (e.g., 4-20 mA or Modbus) may be used for data transmission. Applications: Paddle wheel flow sensors are commonly used in various industries, including water treatment, HVAC systems, chemical processing, and industrial manufacturing. They are suitable for measuring the flow of clean or mildly contaminated liquids. Advantages: Relatively simple design. Suitable for a wide range of flow rates. Cost-effective compared to some other flow measurement technologies. Considerations: The material of construction should be compatible with the fluid being measured. Installation orientation and proper sizing are critical for accurate measurements.
