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Air flow sensors

Precise air flow sensors and air flow meters from WIKA

Air flow sensors and air flow meters are suitable for the measurement and control of air flows in ventilation and air-conditioning. Air flow sensors are easy to install and measure the total pressure, the static pressure of the air flow and the average air velocity. In combination with the model A2G-100 PID controller, the user has efficient volume flow control of the ventilation or air-conditioning system.

The air flow meters of the model A2G-25 determine the volume flow using a configurable fan constant (K factor) for all common manufacturers. The electrical output signals of 0 ... 10 V or 4 ... 20 mA can be selected directly in the instrument using jumpers.

What are the fields of application for air flow sensors and air flow meters?

In refineries, flow nozzles are used, for example, to measure the volume flow of steam flows that, under high pressure, escape into the atmosphere. For the monitoring of coolant circuits, calorimetric flow switches with integrated LED displays are suitable.

The measurement of volume flows in ventilation pipes in air-conditioning technology is carried out by compact air flow meters with electrical output signals. The exact control of the room air supply is used for energy-efficient air conditioning in accordance with applicable EU standards.

How does an air flow sensor work?

For the monitoring of air flows in ventilation and air-conditioning systems, flow sensors are suitable for volume flow calculation based on the measured differential pressure and the fan constant (K factor) of the connected radial fans. The exact measurement of the smallest differential pressures is crucial for the cost-effective and technical monitoring of room air systems. Here, PI controllers and pitot tubes are also used for this application.

Which volume flows can be measured with WIKA air flow meters?

The air flow meter, model A2G-25, measures air flows up to 200,000 m3/h. Also differential pressures up to 7,000 Pa can be measured. This air flow meter is ideal for measuring air flows in ventilation pipes and ducts in conjunction with the model A2G-FM measuring probe.

We are happy to advise you in your customer-specific selection and can examine individual solutions for you.

FAQ
FAQ

What is the function of ventilation and air-conditioning measuring instruments?

Measuring instruments for ventilation and air-conditioning can indicate any excessive pressure loss due to dirty filters, enable the control of the correct operating state and prevent frost damage to the heat exchangers. In addition, they can be us ...

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What is the WIKA Build ID?

The WIKA Build ID is a unique seven-digit code that temporarily saves an individual WIKA instrument configuration. The WIKA configuration can be saved, shared and used later using the Build ID.

What happens after the minimum validity of the WIKA Build ID has expired?

Validity cannot be guaranteed after three months.