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• Sensors not included. Sensors are optional.
• Intuitive: Clearly structured measurement menus for volume flow, K factor, degree of turbulence, heating/cooling output, mold detection, and long-term measurement, such as CO₂
• Wireless: Optional Bluetooth probes for extra convenience when measuring, and less cable clutter in your instrument's case (probes sold separately)
• Clear and Reliable: Large graphic display with parallel display of 3 readings, as well as internal memory for data storage and USB port for data export
• Includes a differential pressure sensor for pitot tube measurements and monitoring filters

Air Velocity and IAQ Measuring Instrument with Differential Pressure Sensor

Use the  440 dP air velocity and IAQ measuring instrument in combination with high quality probes to measure and store all air velocity and IAQ parameters. Up to 3 probes can be connected simultaneously – a Bluetooth probe, a wired probe, and a temperature probe with a type K thermocouple connector (probes sold separately). Automatic probe detection and clearly structured measurement menus guarantee simple operation and will make your day-to-day work easier.

The  440 dP comes with an integrated differential pressure sensor. This enables filter and fan measurements, as well as pitot tube and K factor measurements (pitot tube sold separately)

Measure in no time with the  440 dP multifunction measuring instrument

Carry out your measurements quickly and easily. This multifunction instrument automatically detects each connected probe, which means you won't need to manually reset measurement parameters when changing probes. Clearly structured measurement menus for measuring the volume flow in ducts and at outlets, funnel measurement, determining volume flow via differential pressure and K factor, measuring the degree of turbulence, determining heating/cooling output, mold detection, and long-term measurement provide you with the optimal support for quick and efficient work.

A wireless space saver: More applications, less equipment

Endlessly versatile – the universal probe handle can be connected to all probe heads, so you can measure everything you need, while saving money and space.

The Bluetooth probe handle makes it more convenient to carry out your measurements, and guarantees less cable clutter in your case. It makes it possible to carry out measurements without any bothersome cable connections, and it transfers readings up to a distance of 65 feet. If using a wireless connection is not possible, use the cable probe handle as a practical alternative.

Practical measurement data management

The  440 dP stores up to 7,500 measurement protocols, which can be read via USB port and further processed as a CSV file on your computer (e.g. with Excel). With the  Bluetooth / IrDA printer (sold separately), you have the ability to produce a printed report of measurement data directly on site.

Intelligent calibration concept for maximum precision

You can rely on the accuracy of your measurement results with our digital probes, because the  440 dP makes measurement uncertainty a thing of the past. You only need to send the probes in for calibration, meaning the multifunction instrument can remain in continuous use with a variety of interchangeable probes.

Advantages of measuring with the  440 dP air velocity and IAQ measuring instrument

Precise and reliable in ducts and at air outlets

Large range of connectable probes: Hot wire and vane probe (Ø 0.6") for measurements in ducts, large vane probes (Ø 4") for measurements at air/ceiling outlets

Calculate volume flow quickly: In the measurement menu, simply configure the dimensions and geometry of the duct cross-section and see the volume flow displayed straight away

Easy to carry out measurements in larger ducts, due to the extendable telescope on the hot wire and vane probes (Ø 0.6"), up to a total length of about 6.5 feet

Carry out measurements at air/ceiling outlets effortlessly, without using a ladder – fit the vane probe (Ø 4") with the extendable telescope and 90° angle (both sold separately)

Use the vane probes in conjunction with the  vent measurement funnels and flow straighteners to test incoming / outgoing air at plate outlets, ventilation grills, and swirl outlets

Practical Bluetooth interface: Use the air velocity probes to measure without having to deal with any bothersome cables, operate the measuring instrument by pressing the button on the handle of the probe, e.g. to start or stop a timed mean calculation

Use the practical rear magnets to securely attach the multifunction measuring instrument to metal surfaces (e.g. ventilation ducts)

Long-term monitoring of indoor air quality

The right probe for your requirements: Probes for CO2, CO, and air temperature and humidity are available as wired or Bluetooth variants

Easy to use: Enter the measurement period and interval for long-term measurement, and track it over the course of the day

Internal memory for up to 7,500 measurement protocols

Turbulence measurement in accordance with EN ISO 7730 / ASHRAE 55

Attain a high level of accuracy, even at low air velocities, with a turbulence probe

Automatic calculation of draft risk and degree of turbulence in accordance with EN ISO 7730 / ASHRAE 55

For convenient measurements at varying heights, we recommend using our measuring tripod for comfort level measurement – this makes it easy to position turbulence probes in compliance with testing standards

Wide range of probes for laboratories and cleanrooms

Fume hood probe for high precision air velocity measurements

Thanks to its low startup speed of 0.1 m/s, the available vane probe (Ø 4") is ideal for laminar flow measurements in cleanrooms, available as a wired or Bluetooth variant

High precision temperature / humidity probe (0636 9771 or 0636 9772) with an accuracy of ±0.6% RH + 0.7% of m.v. in the 0-90% RH range for measuring the humidity in cleanrooms

In The Box

 440 dP air velocity and IAQ measuring instrument with integrated differential pressure sensor

Connection hose

3 AA batteries

USB cable

Calibration protocol

Manuals/Guides

Brochures

 Intuitive Air Velocity and IAQ Brochure

Manuals

 440 dP Instruction Manual

Spec Sheets

 440 dP Datasheet

Application Notes

Application Note

TPI - SP597

Manufacturer Specs

Temperature - NTC

Measuring range             -40.0° to 302.0 °F / -40 to +150 °C

Accuracy             ±0.7 °F (-40° to -13.2 °F) / ±0.4 °C (-40 to -25.1 °C)

±0.5 °F (-13° to 166.8 °F)

±0.7 °F (167° to 211.8 °F) / ±0.4 °C (+75 to +99.9 °C)

±0.5 % of mv (Remaining Range)

Resolution         0 °F / 0.1 °C

Temperature - Type K TC

Measuring range             -328.0° to 2498.0 °F / -200 to +1370 °C

Accuracy             ±(0.5 °F + 0.3 % of mv) / ±(0.3 °C + 0.3 % of mv)

Resolution         0 °F / 0.1 °C

Differential pressure (internal sensor) - Piezoresistive

Measuring range             -60 to +60 InH2O / -150 to +150 hPa

Accuracy             ±0.02 InH2O (0 to 0.40 InH2O) / ±0.05 hPa (0 to 1.00 hPa)

±0.1 InH2O + 1.5 % of mv / ±0.2 hPa + 1.5 % of mv

(0.40 to +60 InH2O) / (1.01 to +150 hPa)

Resolution         0.00 InH2O / 0.01 hPa

General technical data

Weight 8.8 oz. / 250 g

Dimensions       6.1 x 2.6 x 1.3 in. / 154 x 65 x 32 mm

Operating temperature -4.0° to 122.0 °F / -20 to +50 °C

Product colour  black/orange

Connectable probes       1 x digital probe with cable or 1 x Temperature NTC TUC, 1 x digital Bluetooth probe or  Smart Probe, 1 x differential pressure (internal), 1 x Temperature TC Type K

Battery type       3 x AA 1.5 V

Battery life         12 h (typically vane measurement)

Interface            Bluetooth®; USB

Storage temperature     -4 to +122 °F / -20 to +50 °C

Tech Specs

Test Equipment General Attributes

Product Height  2.76 IN

Product Length 11.42 IN

Product Width  5.91 IN

HTS/Schedule B Number             90262020000

ECCN Number   EAR99

Country of Origin            China

Shipping Height 2.76 IN

Shipping Length 11.42 IN

Shipping Width 5.91 IN