The testo 440 Air Velocity and IAQ Meter combines all the benefits of a compact handheld device with intuitive measurement menus and a comprehensive selection of air velocity & IAQ probes. This means you have all measuring tasks on air conditioning and ventilation systems reliably under control. You can connect the testo 440 to a large selection of digital probes, testo Smart Probes, or even numerous testo temperature probes, allowing for numerous configurations to meet your needs. The clearly structured menus for measuring volume flow in ducts and at outlets, cooling/heating load, K-factor, turbulence, mold indication and even a data logging mode are stored on the instrument for additional convenience. These menus enable you to accomplish your measuring tasks more quickly, more efficiently and more reliably than ever before. Reports can also be exported as excel files via the USB interface or printed out directly on site. The testo 440 air velocity & IAQ meter dP model version includes an integrated differential pressure sensor. This makes measurements at filters as well as Pitot tube and K-factor measurements possible.
• Integrated differential pressure sensor, for checking filters, for Pitot tube measurements (Pitot tubes can be ordered separately), or K factor measurements
• Use the vane probe (Ø 100 mm) to conveniently determine air velocity, volume flow and air temperature at air/ceiling outlets: Measuring range: +0.3 to +35 m/s, -20 to +70 °C
• Use the hot wire probe to measure air velocity, volume flow, air temperature and humidity in ventilation ducts: Accurate measurements from 0 to +50 m/s thanks to the robust sensor and automatic absolute pressure compensation. Air temperature and humidity measuring range: -20 to +70 °C, 5 to 95% RH
• Use the vane probes in conjunction with the testovent measurement funnels and flow straighteners to test incoming / outgoing air at plate outlets, ventilation grills, and swirl outlets
• Easy storage and evaluation of measurement data. Measurement data memory for up to 7500 measurements, which can be read via a USB port sent as a CSV file on a computer
• Conveniently placed handle button stores individual readings for multi-point mean calculations, or to start and stop measurement series for mean calculations over time
• Carry out measurements at air/ceiling outlets effortlessly, without using a ladder – fit the vane probe with the extendable telescope and 90° angle (both sold separately)
• Intelligent calibration concept – the testo 440 remains in continuous use and only the individual probes need calibration

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