Flow Sensors

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Flow Sensors: Monitor Consumption and Keep Processes Stable

Flow sensors (flow meters) help monitor the flow of air, gases and liquids in industrial systems. They support energy efficiency by identifying leaks and excessive consumption, help with equipment setup and provide reliable process control. This page brings together solutions for different automation applications and helps you select products by their specifications.

How to Choose a Flow Sensor for Your Application

Medium: compressed air, inert gases or liquids. Specify the operating pressure and temperature.
Flow range: allow some headroom at the upper end so the sensor does not operate at its limit.
Output and interface: a switching output, an analog signal (such as 0–10 V or 4–20 mA) or a digital interface compatible with your PLC and I/O modules.
Installation: connection type, dimensions, mounting orientation and any required straight pipe runs, where these affect accuracy.
Operating environment: dust, moisture, vibration, the required IP rating and housing materials.

Typical Applications

Consumption monitoring for individual machines and sections of a compressed air system.
Leak detection and monitoring of unexpected losses.
Process control: maintaining a stable supply of the medium and detecting deviations.
Preventive maintenance: identifying indirect signs of clogged filters or blocked circuits.

Related Categories

If you are selecting a complete system, explore all sensors, pressure and vacuum sensors, I/O and communication, and sensor accessories. For reference materials, visit Technical Information.

What to Prepare for a Faster Selection

For the most accurate recommendation, tell us about the medium, operating range, pressure and temperature, required signal or interface, installation constraints and IP rating. If you need help, contact us.

Frequently Asked Questions About Flow Sensors

What flow range should I choose?

Start with your normal operating flow and allow some headroom at the upper end. This prevents the sensor from operating at its limit and helps maintain stable readings.

Which output is better: 0–10 V or 4–20 mA?

It depends on the inputs available on your PLC or I/O modules. A 4–20 mA signal is generally more resistant to interference over long cable runs, while 0–10 V can be simpler to connect.

Can the same flow meter measure both air and liquids?

Not always. The choice depends on the medium, pressure, temperature and accuracy requirements. Share your operating conditions and we will help you choose a suitable type.

Do I need straight pipe runs?

That depends on the measurement principle and installation. Some flow sensors require straight pipe runs for accurate readings. Check the installation guidance for the specific model.