Flow monitors - monitor gas and air flows

If you want to control the gas flow in pipe systems or in Ventilation, heating and air conditioning systems If you want to reliably monitor the air flow in a ventilation system, a gas flow monitor or air flow monitor is your first choice. Equipped with modern sensors, the devices provide reliable values by detecting deviations at an early stage through the target/actual comparison and warning you with an acoustic signal. With a gas flow monitor, you are able to intervene quickly in the event of problems and ensure that the system runs smoothly.

Air flow monitoring up to 80°C media temperature

Air flow monitors for a media temperature range up to approx. 80°C are used for monitoring, measuring and controlling flows. From simple monitoring of supply and exhaust air in buildings to sophisticated automation solutions, sensors from SEIKOM Electronic can be used.

Essential criteria for selecting the right airflow monitor are:

Design (compact design or evaluation unit for control cabinet installation with separately available sensor)

Signal output (Relay output, relative or linear analog output (0-10 V, 4-20 mA).

Sensor material: nickel-plated brass, stainless steel, Teflon


Available devices

Flow monitoring of gases - devices in compact design

Flow monitoring of gases - devices with evaluation unit and separate sensor

Sensor F2

From 93.00 Excl. VAT

At SEIKOM Electronic we have a large selection of flow monitors for gas and air available for you. Our models meet individual requirements and are 100 % "Made in Germany". You can rely on our decades of experience and comprehensive expertise. Feel free to browse through our range and discover gas flow monitors at an attractive price-performance ratio.

Experience and expertise in airflow monitoring

30 years ago, we dedicated ourselves to the passion for Innovative measurement and control technology Since then, we have become one of the leading suppliers in the fields of gas and air flow measurement, temperature measurement with temperature sensors, pressure measurement with Pressure transmitters and the offer of Heating, ventilation, air conditioningDevices and much more. Enjoy the benefit of a Safety Integrity Level range and explosion protection (ATEX) that very few companies can offer you. Take a look at our selection of ATEX products. We also specialize in TÜV-certified quality and professional services. Speed and a high degree of customer orientation for individual solutions are a matter of course for us.

What does a flow monitor for gas offer?

A Gas flow monitorThe gas flow monitor, often simply referred to as a flow switch or flow monitor, accurately and precisely monitors the flow rate or flow of gas or air in a piping system. If the gas flow falls below or exceeds a preset value, the gas flow monitor sends out a signal which triggers an alarm message. If this is the case, you have sufficient time to close the affected valve or initiate further protective measures.

Areas of application for our airflow monitoring products

Ventilation and air conditioning

Monitoring of fans/ventilators, ventilation and air conditioning, control and regulation of ventilation systems

Extraction systems

Air flow and filter monitoring

Electric heating devices, heating coils, air heaters

Airflow monitoring

Test and inspection facility

Monitoring the proper functioning of exhaust gas monitoring extraction systems

Extruder systems

Control, regulation and monitoring of air flow

Plastics industry

Granulate drying systems

Packaging machines

Regulation and monitoring

Painting systems

Supply air monitoring

Soldering systems

Monitoring the exhaust air at the soldering tank

Hot air welding systems

Supply air control

Pneumatic clamping technology

Compressed air monitoring

Air curtain systems

Air Curtain and Door Air Curtain Airflow Monitoring

Surface technology

Air extraction monitoring

How does an airflow monitor work?

In air flow monitoring or gas monitoring, the gas flow monitor constantly checks the flow rate of the medium. The exact mode of operation depends on the type of sensor used. Modern sensors are based on physical principles in order to detect changes in the flow rate quickly and precisely. Probably the most frequently used method for a gas flow monitor is the thermal principle. This method uses two thermocouples or temperature sensors. While one sensor is heated to a set value, the other concentrates on the ambient temperature of the gas. The gas flow monitor measures the temperature difference between the two sensors in proportion to the gas flow velocity. If the flow falls below or exceeds the threshold value you have set, the gas flow monitor detects this and triggers a corresponding action, be it an alarm or the automatic closing of a valve.

Another principle that can come into play with a gas flow monitor is based on a mechanical sensoroften in the form of an impeller located in the gas flow. When gas or air flows through the pipe, it turns the impeller. A sensor monitors the rotational speed of the impeller. The speed is a direct measure of the gas flow. If the flow falls below or exceeds a certain value, the air flow monitor also triggers a signal in this case.

There are also other types of sensors, such as those based on acoustic or magnetic-inductive principles. Regardless of the specific principle, however, the basic function of the gas flow monitor is always the same: it continuously monitors the flow of matter and intervenes if it does not meet the specified requirements. This ensures that the gas or air flow in a system always remains within safe and efficient limits.

What are the advantages of airflow monitoring?

The use of a gas flow monitor has different advantages for different areas of application and requirements. If you need reliable gas and air flows, it is advisable to consider purchasing air flow monitors. In many systems, especially when hazardous or flammable gases are involved, an unexpected decrease or increase in airflow can lead to dangerous situations. The air flow monitor detects such deviations at an early stage and you can react immediately. If the air flow in industrial processes or laboratories is decisive for the quality of the end product or if it is a matter of protecting sensitive devices from overheating, an air or gas flow monitor also demonstrates its remarkable performance in this case.

Another advantage of air flow monitoring is that the air or gases circulate efficiently and with the correct setting. In this case, the gas flow monitor is convincing as a Energy efficiency-carrier and helps you to save energy costs. Furthermore, the usually significantly higher costs for manual measurement are eliminated, which also reduces the commitment of employee capacities.

With a gas flow monitor, the threshold values can usually be set individually, which guarantees you maximum flexibility. This allows you to meet different application conditions and requirements.

A gas flow monitor also does a reliable job when it comes to maintenance. If, for example, blocked filters are the cause of a sudden drop in air flow or a fan is threatening to fail, the problems can be identified more quickly and you can plan and carry out preventive maintenance work accordingly.

Overall, a gas flow monitor increases the reliability, safety and efficiency of your systems in which the control and monitoring of the air flow is of central importance.

Where are gas flow monitors used?

It will come as no surprise to you that a gas flow monitor with its many advantages is used in a wide range of applications. In industry in particular, the devices are considered indispensable when it comes to measuring the flow of gases and air flows.

The areas of application include

  • ventilation and air conditioning (HVAC) systems to ensure the desired room temperature and air quality.
  • Clean rooms to prevent contamination.
  • Laboratories for the proper functioning of fume cupboard systems.
  • Industrial process control for product quality and safety.
  • boilers and heating systems so that sufficient combustion air is available and exhaust gases are properly discharged.
  • server rooms and data centers to prevent the hardware from overheating.
  • Mining and tunnel construction, for monitoring the supply of fresh air and the extraction of exhaust gases.

Certainly just a few examples in which a gas flow monitor or Air flow monitor plays a decisive role.

Our selection of air flow monitors

In our Product categories discover a wide range of gas flow switches and air flow switches that meet your specific requirements.

One of our most popular models is the Air flow monitor evaluation unit NLSW45-3 as a universal flow monitor with switching output for switch cabinet installation. The model has been tested by TÜV NORD in accordance with DIN EN 61010-1: 2011-07. The measuring range of the gas flow monitor is 0.1 ... 30 m/s. Commissioning is quick and easy. An alternative is the compact flow monitor including sensor RLSW4R with relay output (NO) and a measuring range of gases with infinitely variable adjustment between 0.1 ... 15 m/s. The robust sensor design, IP67 protection class and compact dimensions of this gas flow monitor should be emphasized.

We also offer variants such as the gas flow monitor with remote sensor RLSW4A M8 including analog output for measuring ranges of gases between 0.1 ... 30 m/s and the RLSW6AR flow monitor with two relay outputs for HVAC applications. This includes sensors and an automatic reset.

If you have any questions about our gas flow monitors or would like to find out more about our entire range, we are always available to answer your questions or provide individual advice. Simply get in touch with us.

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