Beijing Gallop Blog

  Ultrasonic flowmeters   (USMs) have been in commercial use since the 1960s and are widely adopted across various process applications. However, their performance can be significantly impacted by specific process conditions, making proper installation and use essential to harness their benefits.   USMs employ different measurement methods, such as the transit time principle and the Doppler effect principle, but share a common feature: ultrasonic sound waves are transmitted through the fluid and detected by a sensor/transmitter. The path of these sound waves differs based on the meter type. Available in flanged/intrusive and clamp-on non-intrusive variants, USMs are suitable for measuring both gases and liquids. While they can handle two-phase flows, they perform best with single-phase fluids. Certain mixtures or slurries may obstruct ultrasonic signals, leading to reduced performance, which must be considered during meter selection.   Advantages of USMs:   - Ro...

  Open channel flow meters   measure the level, flow rate, and total volume of water in weirs, flumes, channels, and partially filled pipes. These meters use a non-contact level sensor to detect water levels and apply Manning’s equation along with channel characteristics to calculate flow rate and volume. Area velocity flow sensors can be installed at the bottom of ditches, channels, or culverts. They use ultrasonic pulses to measure the depth and velocity of the water to be able to calculate the flow rate (flow). These systems are very easy to install due to simpler installation and can save money based on the time it takes to install the flume or weir. Another benefit is that once the sensor is installed, the flow data is recorded into a digital file for future review or water use decisions.   Ultrasonic flow meters measure the level in a channel by transmitting a pulse of sound from the face of the sensor to the surface of the flow stream and measuring the time fo...

  Electromagnetic flow meters, or magmeters, are comprised of a transmitter and sensor that together measure flow. The magnetic flow meter's sensor is placed inline and measures an induced voltage generated by the fluid as it flows through a pipe.   The electromagnetic flowmeter uses Faraday's Law of electromagnetic induction to measure the process flow.   When an electrically conductive fluid flows in the pipe, an electrode voltage E is induced between a pair of electrodes placed at right angles to the direction of magnetic field.   Electromagnetic flow meters  feature a design that is free of obstructions, eliminating flow resistance. They operate with electrodes positioned on opposite sides of the flow tube or sensor to detect the signal. These meters are highly effective in a wide range of municipal and processing applications and are the preferred choice for measuring conductive liquids, such as water or slurry.   One of the key advantages of mag meter...

  A flow transmitter can be installed alongside the flow meter to transmit the meter's output to the control station monitored by the operator. This allows the operator to effectively monitor and maintain the correct volume, flow rate, temperature, and pressure of the material being transported through the pipeline.   What Are Flow Transmitters?   Flow transmitters , also known as flow meters or flow sensors, are devices designed to measure the rate of flow of a fluid (liquid or gas) through a pipeline or conduit. They play a crucial role in a wide range of industries, including petrochemical, pharmaceutical, food and beverage, water treatment, and more. The primary purpose of flow transmitters is to provide accurate and real-time data on the flow rate of a fluid. This information is essential for process control, monitoring, and optimization. By knowing how much of a substance is moving through a system at any given time, operators can make informed decisions to maintain...