testo 440, Measuring instrument for velocity and indoor air quality

Testo 440: Multi-functional Instrument for Velocity and Air Quality Measurement

All Necessary Measurements with a Single Multi-functional Testo 440 Instrument

Perform measurements quickly and easily: the velocity and air quality measuring instrument automatically detects the connected probe, eliminating the need for manual parameter setup.

Clearly structured measurement menus for:

• Volume flow in ducts / at ventilation outlets
• Measurements with a funnel
• Turbulence degree measurements
• Determination of heating / cooling output
• Mold detection
• Long-term measurements

All of this ensures you have the necessary functionality for your daily work.

Wireless and Compact: More Capabilities, Less Equipment

The universal handle can be connected to any probe tip, allowing you to solve any measurement task and reducing the size and weight of your measuring kit.

The Bluetooth handle significantly simplifies your work: the wireless connection allows for data transmission up to 20 meters. If using Bluetooth is impossible, you can always use the wired handle.

Practical Measurement Management

The instrument’s internal memory is designed for 7,500 measurement protocols. Data can be:

• Viewed on the display.
• Exported to a PC via the USB port in CSV format (e.g., for Excel).
• Printed directly at the measurement site using a BLUETOOTH/IRDA printer (ordered separately).

Smart Calibration Concept for Maximum Accuracy

You can fully rely on the measurement accuracy of digital probes. Thanks to the smart calibration concept, you only need to calibrate the probe tip and replace it. The instrument itself can continue to be used with other probes, ensuring uninterrupted operation.

Advantages of the testo 440 Instrument

Accuracy and Reliability in Ducts and at Ventilation Outlets

• Wide selection of probes: hot wire probe and vane probe (Ø 16 mm) for ducts; vane probe Ø 100 mm for outlets.
• Fast volume flow calculation: simply input the size and shape of the duct cross-section.
• Measurement convenience: telescopic extension (up to 2 m) and 90° angle bracket for measurements in large or ceiling ducts without a ladder (ordered separately).
• Use of testovent funnels and flow straighteners with vane probes (Ø 100 mm) for plate outlets and diffusers.
• Magnetic attachments for securing the instrument to metal surfaces.

Long-term Indoor Air Quality Measurements

• Suitable probes for CO
  2
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  , CO, temperature, and humidity (available with Bluetooth and with a cable).
• Ease of use: set the period and intervals for automatic tracking of results throughout the day.
• Internal memory: 7,500 measurement protocols.

Turbulence Measurement and Compliance Assessment with EN ISO 7730 / ASHRAE 55

• High accuracy when measuring low air velocities thanks to the turbulence probe.
• Automatic determination of draft risk and degree of turbulence.
• Use of a tripod is recommended for long-term measurements for standard compliance (ordered separately).

Probes for Cleanrooms and Laboratories

• Special hot wire probe for measurements in fume hoods.
• High-precision vane probe (Ø 100 mm) with a lower limit of 0.1 m/s, ideal for laminar flow.
• High-precision temperature/humidity probes for cleanrooms: accuracy ±(0.6% RH + 0.7 % of meas. val.) in the range 0 … 90% RH.

Technical Data

Temperature Measurement (NTC sensor)

• Range: -40 … +150 °C
• Resolution: 0.1 °C
• Accuracy: ±0.4 °C (-40 … -25.1 °C), ±0.3 °C (-25 … +74.9 °C) etc.

Temperature Measurement (Type K Thermocouple (NiCr-Ni))

• Range: -200 … +1370 °C
• Resolution: 0.1 °C
• Accuracy: ±(0.3 °C + 0.3 % of meas. val.)

General Technical Data

Ordering Information and Metrology

Order No.: 0560 4401

Metrology (Republic of Kazakhstan)

• Registered in the Register of the State System for Ensuring the Uniformity of Measurements of the Republic of Kazakhstan.
• Number: KZ.02.01.01360-2021
• Date of Registration: 27.12.2021
• Valid Until: 27.12.2026