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    Air velocity & IAQ measuring instruments

    The air meter is a valuable aid when it comes to both setting air conditioning and ventilation systems as well as assessing indoor air quality.

    A multifunction measuring instrument enables you to determine important climate parameters, such as CO2, air humidity, air temperature and absolute pressure, reliably and precisely.

    A measuring instrument of this kind goes far beyond a classic hygrometer which is purely for the determination of humidity. The possibility of connecting a variety of optional probes enables different climate factors to be measured.

    A multifunctional air meter has the following advantages:

    • Optimum setting of air conditioning and ventilation systems

    • Assessment of indoor air quality or comfort level measurements

    • A variety of combination possibilities with probes for optimal measurements

    • Easy to use

    • Mobile design

    Multifunctional measuring devices: online product advisor

    to the consultant

    Multifunctional climate measuring devices

    Instruments and kits

    The air meters in comparison

    Professional

    Product details

    IAQ instrument testo 400

    • Perfect for standard-compliant measurements

    • Guided programs for HVAC grid measurements and comfort levels (PMV/PPD)

    • Highly accurate, individually calibrated probes

    • Probes can simply be replaced without restarting the instrument

    • Full documentation that can be completed on site

    The multifunctional testo 440

    • Perfect for fast and intuitive measurements

    • Clearly structured measurement menus for all VAC applications

    • Wireless Bluetooth® probes for greater measuring convenience with no cable mess

    • Highly accurate, individually calibrated probes

    • Internal memory with 7,500 measurement values and USB interface for protocol export

    Practical guide

    Air flow measurements in ducts according to DIN EN 12599

    Download the exclusive practical guide for free now.

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    Significance of air velocity

    Measurement of the right air velocity

    The right measurement location

    The measurement method

    Analysis of the measurement values

    The measurement report

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    One for all: Why you can save in the long term with a multifunction instrument

    Have you ever thought about it?

    Multifunctional measuring instruments have many advantages which make your job easier:

    • You have one tool to manage, which is equipped with all air velocity and IAQ measurement tasks.

    • You select the probes you need which can be interchanged as often as you like.

    • You invest only once – and benefit in the long term from robust, intelligently designed technology.

    Sound interesting? Then our multifunction measuring instruments are just right for you.

    Climate measurement for the precise determination of air humidity

    Ideal for determining a variety of climate parameters

    The multifunction air meter can be used to carry out humidity measurements but also to determine different climate parameters. Depending on the instrument, air meters can be upgraded using various probes to enable values such as absolute pressure, air temperature or CO₂ content in the air. The functions therefore go far beyond those of a pure humidity meter and enable the determination of various climate parameters with just one instrument. The multifunction air meter thus supports you in determining a variety of factors for indoor air quality assessment and comfort level measurements. Furthermore, it provides you with an important aid in terms of the precise setting of ventilation and air conditioning systems.

    Modern multifunction measuring instruments, offer the following advantages:

    • Easily read precise measurement values on the display

    • Determine a range of different climate parameters with just one instrument

    • Use of optional probes enable the measuring instrument to be adaptable for individual needs

    Optimum air quality – perfectly under control thanks to cutting-edge measuring instruments

    A variety of factors play an important role in terms of optimum air quality. An indoor air meter enables you to determine the temperature, air humidity or also the CO₂ content in a room. The measurement of these parameters provides a good basis for assessing indoor air quality.

    In addition, the appropriate probes enable you to determine even more measuring values in terms of assessing air quality. An extremely precise indication of mould is for instance enabled in this way. A pure air humidity meter alone is therefore not sufficient when it comes to meaningful and complete air quality assessment.

    Testo's measuring instruments enable you to enjoy measurement options for your individual needs through adapting with optional probes.

    Set ventilation and air conditioning systems correctly with the air meter

    Does your task involve setting ventilation and air conditioning systems? Then you need a precise measuring instrument which provides you with accurate results. Because even small discrepancies can cause problems with air conditioning and ventilation systems, don't work with approximate values.

    Testo measuring instruments offer thermal anemometers and vane anemometers for measuring the air speed and volume flow in ventilation ducts. These options can be connected individually. Here, the measuring instrument offers intuitive operation with clearly structured measurement menus for volume flow, degree of turbulence or cooling and heating output as well.

    A wide variety of combination options are possible thanks to high-quality digital probes, to ensure you are ideally equipped for every measuring task.

    If you are measuring moisture in materials, try the material moisture meter at Testo.

    testo Smart App

    One App for all applications

    The testo Smart App guides you quickly and easily through measurements on refrigeration, air conditioning and heating systems.

    Newly added:

    PRO measuring programs for increasing the efficiency of your applications

    Find out more

    Multifunctional

    Compatible with all Bluetooth-enabled Testo measuring instruments

    Efficient

    Direct report dispatch by e-mail

    Fast

    All measurement values at a glance

    Easy

    Intuitive measurement menus

    Smart

    Free download, free use

    NEW

    PRO measuring programs