Accurate and convenient measurement in ducts with Testo measuring instruments

The easy way to optimum measurement results in all flow velocity ranges.

In order for air conditioning and ventilation systems to run smoothly and efficiently, the flow velocity in the ventilation duct must be regularly checked. Only when the flows in the duct correspond to the requirement are the room loads (heat, cold and substance load) reliably transported away – and the indoor air quality is right.

If the ventilation duct is accessible, duct measurement is then the best solution. This is because air flows are measured most accurately directly in the duct. However, it must be taken into account that the flows in the duct are usually non-homogenous and turbulent.

In order to obtain reliable results in spite of this, measurements should always be taken at several points over the duct cross-section. In these grid measurements, the mean flow velocity is calculated from the individual measurement values.

Ventilation measuring instruments from Testo support you in grid measurement just as reliably as in the automatic calculation of volume flow.

Which instrument suits your application depends on the flow velocity range you wish to measure.

Lower flow velocity range up to 5 m/s

Thermalanemometer testo 425 (0 to 20 m/s)

Our accuracy champion in the flow velocity range from 1 to 5 m/s. With fixed telescopic flow velocity probe up to 820 mm length for duct measurement.

Thermalanemometer testo 405i (0 to 30 m/s)

Work comfortably thanks to operation completely via testo Smart Probes App. Easy report creation and data dispatch by e-mail.

Thermalanemometer testo 405 (0 to 10 m/s)

Particularly accurate in the range between 0 and 2 m/s Equipped with 300 mm telescopic probe. Automatically calculates the volume flow.

Medium flow velocity range from 5 m/s

Vaneanemometer testo 416 (0.6 to 40 m/s)

Our accuracy champion in the flow velocity range from 5 m/s. Telescope length up to 890.

Differentialpressure measuring instrument testo 420 (-120 to +120 Pa)

Measures flow velocities up to 14 m/s in combination with a Pitot tube or a flow velocity matrix.

Medium to high flow velocity range from 40 to 100 m/s, as well as highly contaminated flows

Differential pressuremeasuring instrument testo 510 (-100 to +100 hPa)

Compact and with integrated display.

Differentialpressure measuring instrument testo 510i (-150 to +150 hPa)

Controlled by your smartphone. Reports easily created and sent via testo Smart Probes App.

For more details please visit our website www.testo.com/en-IN or contact us on bellow address:

Testo India Pvt. Ltd.
Plot No. 23, Sind Society, Baner Road, Aundh, Pune – 411007 Maharashtra, India
Phone: +91 20 6560 0203
E-Mail: info@testoindia.com
Fax: +91 20 2585 0080

All flow velocities under control with Testo measuring instruments

 Ventilation and air conditioning measuring instruments from Testo. All outlets, All flow velocities - One expert.

Test air conditioning and ventilation systems – in ducts, at outlets, and with multifunction instruments.

The correct and efficient adjustment of ventilation and air conditioning systems makes very high demands of measurement technology, due to the various measurement locations and the differing flow velocities. 

Whether the precise determination of volume flow, quick spot measurements in ducts or the recording of turbulent flows at outlets: without suitable measuring instruments, it is impossible to ensure optimum indoor air in residential and non-residential buildings.

The most accurate measurement results can be achieved by measuring directly in a duct. However, since ventilation ducts are in practice frequently hidden or inaccessible, it is often necessary to resort to outlet measurements. In addition to this, turbulence in ducts and at outlets can often falsify measurements. 

As you can see, carrying out precise flow velocity measurements is not easy. For this reason, Testo offers the optimum solution for every measurement task and measurement range: thermal probes, vane anemometers, differential pressure measuring instruments, funnel measuring instruments and multifunction measuring instruments. With the patented flow straighteners from Testo, even turbulent flows can be measured accurately. Here you can find information on how to measure flow velocity more efficiently. 

Innovative App solutions

Writing mails, checking the weather, planning routes: Many things are easier with a smartphone. With our free Apps for the volume flow measurement hood testo 420, and the Testo Smart Probes, ventilation measurement is now also more convenient and less stressful.

• Measurement site-independent operation: Your smartphone becomes the remote control • Convenient measurement value display: Readings are always available when you need them • Clever documentation: Create protocols and reports easily, and send them immediately by e-mail

Patented flow straightener technology

The correct recording of volume flow at ventilation and swirl outlets is often hampered by turbulence. In order for you to be able to obtain precise results even in turbulent flows, Testo has developed patented flow straighteners for testo 417 and testo 420. The flow straighteners convert turbulent air into an almost uniform flow, which can then be reliably recorded with the measuring instrument. This reduces measurement inaccuracies at swirl outlets and in turbulent air by up to 50 %. 

Fast worldwide calibration service

For us, measurement precision does not stop at the delivery of the instruments. Regular calibration is indispensable for constant, reliable results. This is why our subsidiary, Testo Industrial Services (TIS) has a worldwide network of their own calibration laboratories. This allows you quick access to our accredited calibration services – so you can continue to work efficiently.

For more details please visit our website www.testo.com/en-IN or contact us on bellow address:

Testo India Pvt. Ltd.
Plot No. 23, Sind Society, Baner Road, Aundh, Pune – 411007 Maharashtra, India
Phone: +91 20 6560 0203
E-Mail: info@testoindia.com
Fax: +91 20 2585 0080