Difference Between Flow Meter and Flow Transmitter

Brian Craig

November 23, 2020

In the fluid transmission system, several types of devices are used to measure and control the process parameters. The flow meter and the flow transmitter are two important devices used in such systems. For some reason, these two devices are often considered the same. Sometimes their functions are interchanged. However, in reality, both these devices and their functions are quite different than each other. This post introduces the flow meters and the flow transmitters individually and helps you to understand the difference between these devices.

Let us discuss both flow meter and flow transmitters individually to you understand their concepts thoroughly.

A Brief Introduction to Flow Meter

A flow meter is an instrument designed for measuring the rate of fluid flow via a fluid transmission system. It measures the flow rate of a fluid, liquid, or gas when it passes through a confined transmission system. There are different types of flow meters like orifice meters, venturimeters, rotameters, flow nozzles, etc. These different flow meters have different functioning principles. For example, an orifice meter calculates the flow of fluid at the entrance cross-section of a narrow, restricted opening called orifice and at the exit cross-section of the same. On the other hand, a rotameter type of flow meter that measures the volumetric flow rate inside multiple tubes placed at different areas of the transmission pipe.

What is a Flow Transmitter and How it Works?

A flow transmitter is an upgraded version of the flow meter. It is a flow meter with an integrated electronic circuit as an operational system. In the flow transmitter, the activity of flow rate measurement is performed by the electronic circuit on receiving the commands from the operator. Since the flow transmitters feature an electronic circuit, it is possible to control and monitor the fluid flow using these devices.

Differences between the Flow Meter and Flow Transmitter

The following are a few significant differences between flow transmitters and flow meters.

The flow meters’ are designed to measure the flow rate. On the other hand, the flow transmitters not only measure the flow rate but also help in controlling and monitoring it.
The flow meters are standard mechanical systems like orifices, venturimeters, etc. The flow transmitters on other hand feature a mechanical body and electronic functioning circuitry.
The flow meters are designed for manual, on-field applications, however, the flow transmitters can be remotely operated.

When to Use Flow Meters vs Flow Transmitters?

Choose based on system complexity, monitoring needs, and automation goals:

Use Flow Meters for simple, on-site visual monitoring.
Use Flow Transmitters when remote access, integration with SCADA, or automated control is required.

Choosing the Right Flow Measurement Device

When selecting between a flow meter and a flow transmitter, consider:

Type of fluid (gas, liquid, steam)
Required measurement accuracy
Signal output needs
Budget and maintenance preference
Compatibility with existing control systems

Always work with trusted suppliers like The Transmitter Shop for quality flow transmitters, flow meters, and technical guidance.

Now that the differences between the flow transmitters and flow meters are known, you can select the suitable one for you. Certainly, flow transmitters can be helpful in measuring, monitoring, and controlling the flow rate if your application requires it all. However, the quality of the products can make a huge impact on your application, so you must buy from trusted manufacturers or suppliers like The Transmitter Shop. The company provides new surplus and factory new flow transmitters & meters like Rosemount flow transmitters, Foxboro flow transmitters, Rosemount vortex flow meters and so on.

Frequently Asked Questions (FAQ):

What is the difference between a flowmeter and a transmitter?

A flowmeter only measures the flow rate, while a flow transmitter measures and transmits that data for remote monitoring or control.

Is a flow meter the same as a flow transmitter?

No. Though related, a flow meter is a simpler device, while a flow transmitter includes additional electronics for output signal conversion and control.

What is the difference between a flow sensor and a flow transmitter?

A flow sensor detects the actual flow. A flow transmitter includes the sensor and an electronic module to transmit flow data to a control system.

Can a flow transmitter work without a flow meter?

Typically, a flow transmitter integrates a flow meter or sensor within itself. In some configurations, it may receive input from an external flow meter.