Flow transmitter or current transmitter
What Is a Flow Transmitter?
In various industries, the outcome of a process depends entirely on various variables. Among these variables, the measurement of the flow of liquid, vapor, or gas is crucial, which is why various types of equipment are used to measure fluid flow. Flow transmitters are used to display and control various fluid characteristics, flow profiles, and flow ranges. In a flow transmitter or remote-type flow transmitter, the sensor is installed separately on the pipeline.
Types of Flow Transmitters
Flow transmitters come in various types, including:
Turbine Flow Transmitter
Electromagnetic Flow Transmitter
Ultrasonic Flow Transmitter
Blade (Paddle) Flow Transmitter
We will now explain each of these cases further.
Turbine Flow Transmitter
Turbine sensors or turbine flow sensors with electrical output are used remotely to indicate fluid flow velocity. Turbine flow transmitters are suitable for a wide range of industrial, commercial, and laboratory applications. Turbine flow transmitters require a power adapter or coupling cable to function. In the linear model of turbine flow transmitters, flow velocity is controlled through linear models, which are used in applications such as irrigation, process control, discharge lines, pump testing, and chemical batching.
Electromagnetic Flow Transmitter
Electromagnetic flow transmitters with linear electromagnetic sensors with electrical output are used to indicate the flow rate of conductive fluids and are also suitable for measuring the flow rate of conductive fluids in closed pipes.
Electromagnetic flow transmitters are available in adjustable line and fixed installation forms. Electromagnetic flow transmitters are non-moving parts and offer high accuracy.
Ultrasonic Flow Transmitter
Ultrasonic flow transmitters or flow transmitters are sensors with electrical output for remote and non-contact measurement of fluid flow velocity. The advantages of these flow transmitters include appropriate dimensions, light weight, and cost-effectiveness. Ultrasonic flow transmitters are also used in applications such as purified water, river water, diesel oil, recording flow measurement data, measuring heating and utility billing.
Blade (Paddle) Flow Transmitter
Blade flow transmitter or blade flow transmitter is a sensor with electrical output for remote and non-contact measurement of fluid flow velocity.
How Flow Transmitter Works
Flow transmitters or flow transmitters are flow measurement devices used in the production process. Flow transmitters measure the mass flow of any fluid that passes through a pipe at a specific time. Generally, the volume flow rate passing through a pipe in unit time, such as cubic meters per second, is not measured. Instead, flow transmitter or flow transmitter measurements are made in terms of mass volume passing through the pipe, for example, kilograms per second.
The volumetric flow rate is essentially the mass flow rate divided by the fluid's density. The density of the fluid is influenced by variables such as pressure, temperature, or both. The fluid may also be a liquid containing bubbles.
Flow Transmitter Outputs
Flow transmitters or flow transmitters have analog and/or digital outputs. Analog output is suitable for sending signals to longer distances and is typically in the range of 4 to 20 milliamps. The flow rate is 30 to 100 gallons per minute when the output is 4 to 20 milliamps.
In digital output, signal outputs such as frequency signals and pulse signals are encoded by frequency oscillation, frequency modulation, and pulse width modulation. They are also expressed as sinusoidal waves and pulse trains.
Applications of Flow Transmitter
Flow transmitters are widely used in various industrial applications due to their extensive capabilities. These industries include food, water and wastewater, paper, pharmaceuticals, metals, oil and gas, mining, chemicals, cleaning and hygiene, electrical equipment, marine, and automation industries.
Advantages of Flow Transmitter
Below, we'll explain various advantages of flow transmitters:
Flow transmitters or flow transmitters provide precise measurements. Flow transmitters have accuracy of less than 0.15% in volumetric flow and 1.13% in mass flow at maximum in volumetric flow of 0.25%, with an accuracy of 1.40%.
Advanced Diagnostic Features
All transmitters have advanced diagnostic features that include noise detection, sensor fault detection, wiring fault detection, adjustable empty pipe detection, and more.
Minimal Repairs and Maintenance
Flow transmitters are designed without moving parts as they have no moving parts, which means they require minimal to no repairs and maintenance.
Various materials are used to construct flow transmitters, including stainless steel, nickel alloys, high-temperature and low-temperature carbon steel. Flow transmitters are also capable of functioning in harsh environmental conditions.
Flow transmitters are suitable for places where space can be a major concern due to their compact dimensions.
