Buy Alnor Barometer – Overview, Specifications & More

Alnor G200D Low Flow Balometer Capture Hood, 2 ft X 2 ft

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Alnor G200D has a 24-inch x 24-inch hood opening to fit over standard-sized grilles and diffusers situated on roofs, dividers or floors. The hood channels the wind stream through the base to measure air volume (cfm). Weighing under six pounds, the barometer takes into consideration single administrator use and access into tight spaces.

Features of Alnor Barometer

  1. Quick reaction LCD includes an analog bar chart for checking wind current changes and shows advanced readout.
  2. Simple visual chart screens air inclines simultaneously with a digital display perfect for light ventilation estimations.


  1. It is 24 X 34.5 X 24 inches in size and weighs 13.2lb (5.9kg)  It has a maximum air volume of 500CFM and minimum air volume of 10CFM
  2. It has volume resolution of 1 CFM (1 m³/h, 4 L/s)  It has volume accuracy of ±3% (5 CFM or 8.5 m³/h)  It is made of Plastic, Canvas, Metal
  3. The product comes with a NIST-traceable calibration certificate and four C batteries.


  1. Ideal for light ventilation estimations


  1. None


The Alnor Loflow Barometer is a very easy to use and convenient gadget for your HVAC purposes and allows you to measure the airflow from air vents and air conditioning systems. It minimizes the effort that a normal anemometer would require.

The analog charts along with the digital display of the airflow allow a clear understanding of the recorded data giving the user accurate details. This product has received many positive reviews and no consumer has ever reported any complaints against the product, gaining the trust of future consumers.


FAQs Related to Barometer

1. What is a barometer?

An airflow capture hood or a barometer is a gadget utilized for estimating the volume of air leaving grilles and diffusers in HVAC systems.Balometer" is a term authored by Alnor in 1983 that has turned out to be synonymous with airflow capture hood today.

2. What instrument measures airflow?

A barometer can easily measure the airflow coming from grilles and ventilation ducts by simply placing them in front of an air duct. Alternatively, an anemometer can also be used to measure the airflow. An anemometer is utilized to gauge airspeed. The airspeed is utilized to decide the normal velocity in the pipe. At that point, the average feet per minute is multiplied by the area of the pipe in square feet to choose the wind current going through the channel.

3. What is a capture hood?

A capture hood is a gadget that channels the wind current out of a cooling framework. The capture hood measures the relative humidity, temperature and airflow rate from the air-conditioning system. The upsides of the capture hood are its usability i.e. all the estimating instruments required for adjusting and information recovery are provided as a total bundle.

4. How does a barometer work?

The capture hood is set with the end goal that covers the register opening to be estimated, and a button is used to start the test. As the air stream enters the hood region from the register it is regularly turbulent, unpredictable, or whirling, so every stream hood utilizes a component (some more detailed than others) to smooth the airflow.

At that point, the stream goes through an estimating gadget to decide its airspeed. After the estimation gadget, the wind current goes through the outlet at the base of the stream hood. Since this outlet is of a known size, and airspeed has been resolved, the air capture hood would now be able to calculate the wind current volume.

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