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testo 440 dP - Air velocity and IAQ measuring instrument including differential pressure sensor

Order-Nr. 0560 4402

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Intuitive: clearly structured measurement menus for volume flow, K-factor, degree of turbulence, cooling/heating output, mould detection and long-term measurement, such as CO₂
Wireless: Bluetooth® probes for extra convenience when measuring and less cable clutter in the measuring case (please order probes separately)
Clear and reliable: large graphic display with parallel display of 3 readings as well as internal data storage and USB port for data export
Includes a differential pressure sensor: for Pitot tube measurement and monitoring filters

Precise, reliable measurement of all air velocity and IAQ parameters with just one measuring instrument: the multifunction measuring instrument features an integrated differential pressure sensor and intuitive operation with clearly structured measurement menus. Adjusting air conditioning and ventilation systems, monitoring air quality or carrying out comfort level measurements – thanks to versatile options for combining with high-quality, digital probes, you are ideally equipped to carry out your measuring task (please order probes separately).

Details

Product Description

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

A differential pressure sensor is already integrated in the testo 440 dP. This makes it possible to carry out measurements on filters and fans, as well as Pitot tube and K-factor measurements (please order Pitot tube separately).

Measure in just a few clicks with the testo 440 dP multifunction measuring instrument

Carry out your measurements quickly and easily: the air velocity and IAQ measuring instrument automatically detects each connected probe. This means that there is no need for you to manually reset the parameters when changing probes. Clearly structured measurement menus for measuring the volume flow in ducts/at outlets, funnel measurement, determining the volume flow via differential pressure and K-factor, measuring the degree of turbulence, determining the cooling/heating output, mould detection and long-term measurement provide you with optimum support during your day-to-day work.

Wireless and space-saving: more applications, less equipment

Endlessly versatile: a universal handle can be connected to all probe heads – so you can master more applications using less equipment and save space.

The Bluetooth handle makes it more convenient to carry out your measurement and guarantees less cable clutter in the case. It makes it possible to carry out measurements without any bothersome cable connection and it transfers readings up to a distance of 20 m. Or as a practical alternative, use the cable handle to connect testo probe heads. This is an advantage if Bluetooth signals are not permitted.

Practical measurement data management

The multifunction measuring instrument stores up to a max. 7500 measurement protocols, which can be read via a USB port and further processed as a CSV file on your computer (e.g. with Excel). With the testo BLUETOOTH/IRDA printer (please order separately), you have the option of producing a report printout of the measurement data directly on site.

Intelligent calibration concept for maximum precision

You can rely on accurate measurement results when using our digital probes, because the measuring instrument makes measurement uncertainty a thing of the past. You only need to send the probes in for calibration. The multifunction measuring instrument can therefore remain in continuous use.

Advantages of measuring with the testo 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 probes (Ø 16 mm) for measurements in ducts; large vane probes of Ø 100 mm 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 on the measuring instrument straight away
You will even find it easy to carry out measurements in particularly large ducts. This is because the extendable telescope on the hot wire and vane probe (Ø 16 mm) with universal handle can be further extended using the telescope extension – enabling you to attain a total length of 2 metres
Carry out measurements at air/ceiling outlets effortlessly and without using a ladder. Fit the vane probe (Ø 100 mm) with the extendable telescope with 90° angle and, if necessary, with the telescope extension (both can be ordered separately)
Use the vane probes in conjunction with the testovent measurement funnels and flow straighteners to test incoming / outgoing air at plate outlets, ventilation grilles 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. start or stop a timed mean calculation
Use the practical 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, air temperature and humidity are available as variants with Bluetooth or with fixed cable
Easy to use: enter the measurement period and interval in the menu for long-term measurement and track it over the course of the day
Internal memory for up to 7500 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 draught 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 very easy to position turbulence probes in compliance with the standards

Range of probes for cleanrooms and laboratories

Fume cupboard probe for high-precision air velocity measurement on fume cupboards
Thanks to the low start-up speed of 0.1 m/s, the high-precision vane probe (Ø 100 mm) is ideal for laminar flow measurements in cleanrooms. Available as a variant with Bluetooth or with fixed cable
High-precision temperature/humidity probe (0636 9771 or 0636 9772) with an accuracy of ±(0.6% RH + 0.7 % of m.v.) in the range 0 to 90% RH for measuring the humidity in cleanrooms

Delivery Scope

testo 440 dP air velocity and IAQ measuring instrument including integrated differential pressure sensor, connection hose, 3 x AA batteries, USB cable and calibration protocol.

Technical Data

Temperature - NTC
Measuring range	-40 to +150 °C
Accuracy	±0.4 °C (-40 to -25.1 °C) ±0.3 °C (-25 to +74.9 °C) ±0.4 °C (+75 to +99.9 °C) ±0.5 % of mv (Remaining Range)
Resolution	0.1 °C

Temperature - NTC

Measuring range

-40 to +150 °C

Accuracy

±0.4 °C (-40 to -25.1 °C)

±0.3 °C (-25 to +74.9 °C)

±0.4 °C (+75 to +99.9 °C)

±0.5 % of mv (Remaining Range)

Resolution

0.1 °C

Temperature - TC Type K (NiCr-Ni)
Measuring range	-200 to +1370 °C
Accuracy	±(0.3 °C + 0.3 % of mv)
Resolution	0.1 °C

Differential pressure (internal sensor) - Piezoresistive
Measuring range	-150 to +150 hPa
Accuracy	±0.05 hPa (0 to 1.00 hPa) ±0.2 hPa + 1.5 % of mv (1.01 to +150 hPa)
Resolution	0.01 hPa

Differential pressure (internal sensor) - Piezoresistive

Measuring range

-150 to +150 hPa

Accuracy

±0.05 hPa (0 to 1.00 hPa)

±0.2 hPa + 1.5 % of mv

(1.01 to +150 hPa)

Resolution

0.01 hPa

General technical data
Weight	250 g
Dimensions	154 x 65 x 32 mm
Operating temperature	-20 to +50 °C
Connectable probes	1 x digital probe with cable or 1 x Temperature NTC TUC, 1 x digital Bluetooth probe or testo Smart Probe, 1 x differential pressure (internal), 1 x Temperature TC Type K
Product colour	black/orange
Battery type	3 AA mignon 1.5 V
Battery life	12 h (typically vane measurement)
Interface	Bluetooth®; USB
Storage temperature	-20 to +50 °C

Probes

Comfort probes

Turbulence probe (digital), wired: for determining the degree of turbulence and draught risk according to EN ISO 7730 / ASHRAE 55 – measuring range 0 to +5 m/s, 0 to +50 °C

Order Number: 0628 0152

Lux probe (digital) for measuring illuminance, wired

Lux probe (digital), wired: for measuring illuminance in workplaces (e.g. offices, production areas) – measuring range 0 to 100,000 lux

Order Number: 0635 0551

CO2 probe (digital) with Bluetooth® including temperature and humidity sensor

CO₂ probe (digital) with Bluetooth^® including temperature and humidity sensor: for measuring the indoor air quality in offices, production areas or storage facilities – measuring range 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH

Order Number: 0632 1551

CO2 probe (digital) including temperature and humidity sensor, wired

CO₂ probe (digital) including temperature and humidity sensor, wired: for measuring the indoor air quality in offices, production areas or storage facilities – measuring range 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH

Order Number: 0632 1552

CO2 probe head including temperature and humidity sensor

CO₂ probe head including temperature and humidity sensor: for attachment to universal Bluetooth^® or cable handle – measuring range 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH

Order Number: 0632 1550

CO probe (digital) with Bluetooth^®: for measuring carbon monoxide in indoor areas (e.g. boiler rooms) – measuring range 0 to 500 ppm

Order Number: 0632 1271

CO probe (digital), wired: for measuring carbon monoxide in indoor areas (e.g. boiler rooms) – measuring range 0 to 500 ppm

Order Number: 0632 1272

CO probe head: for attachment to universal Bluetooth^® or cable handle – measuring range 0 to 500 ppm

Order Number: 0632 1270

Globe thermometer (TC type K) for the measurement of radiant heat – measuring range 0 to + 120 °C

Order Number: 0602 0743

Humidity probes

Humidity/temperature probe (digital) with Bluetooth^®: for measurements in rooms, ventilation ducts, refrigeration systems and heat pumps – accuracy ±2% RH / ±0.5 °C, measuring range 0 to 100% RH / -20 to +70 °C

Order Number: 0636 9731

Humidity/temperature probe (digital), wired: for measurements in rooms, ventilation ducts, refrigeration systems and heat pumps – accuracy ±2% RH / ±0.5 °C, measuring range 0 to 100% RH / -20 to +70 °C

Order Number: 0636 9732

Humidity/temperature probe head: for attachment to universal Bluetooth^® or cable handle – accuracy ±2% RH / ±0.5 °C, measuring range 0 to 100% RH / -20 to +70 °C

Order Number: 0636 9730

High-precision humidity/temperature probe (digital) with Bluetooth^®: for measurements in cleanrooms and laboratories, and critical processes in the pharmaceutical, industrial and food sectors, as well as in storage, refrigerated and work rooms or in air conditioning/ventilation ducts - accuracy: ±(0.6% RH + 0.7 % of m.v.) (0 to 90% RH) / ±0.3 °C (+15 to +30 °C)

Order Number: 0636 9771

High-precision humidity/temperature probe (digital), wired: for measurements in cleanrooms and laboratories, and critical processes in the pharmaceutical, industrial and food sectors, as well as in storage, refrigerated and work rooms or in air conditioning/ventilation ducts - accuracy: ±(0.6% RH + 0.7 % of m.v.) (0 to 90% RH) / ±0.3 °C (+15 to +30 °C)

Order Number: 0636 9772

High-precision humidity/temperature probe head: for attachment to a universal Bluetooth^® or cable handle – accuracy: ±(0.6% RH + 0.7 % of m.v.) (0 to 90% RH) / ±0.3 °C (+15 to +30 °C)

Order Number: 0636 9770

Robust humidity/temperature probe (digital) for temperatures up to +180 °C, wired: for measurements in industrial exhaust air, in bulk materials and in climatic test cabinets – accuracy ±2% RH (2.1 to 98% RH) / ±0.4 °C (0.1 to +50 °C), measuring range 0 to 100% RH / -20 to +180 °C

Order Number: 0636 9775

testo 605i - thermohygrometer operated via smartphone

Order Number: 0560 2605 02

Pitot tubes

Stainless steel Pitot tube, length 500 mm, Ø 7 mm - for measuring flow velocity

Order Number: 0635 2045

Stainless steel Pitot tube, length 350 mm, Ø 7 mm - for measuring flow velocity

Order Number: 0635 2145

Stainless steel Pitot tube, length 1000 mm, Ø 7 mm - for measuring flow velocity

Order Number: 0635 2345

In the event of dust-laden flow in ventilation ducts or process air and higher flow velocities, we recommend using a Pitot tube.

Order Number: 0635 2043

In the event of dust-laden flow in ventilation ducts or process air and higher flow velocities, we recommend using a Pitot tube.

Order Number: 0635 2143

In the event of dust-laden flow in ventilation ducts or process air and higher flow velocities, we recommend using a Pitot tube.

Order Number: 0635 2243

Pressure probes

testo 510i – differential pressure measuring instrument with smartphone operation

Order Number: 0560 1510

testo 549i - High-pressure gauge operated via smartphone

Order Number: 0560 2549 02

Temperature probes

testo 805i – infrared thermometer with smartphone operation

Order Number: 0560 1805

Waterproof immersion/penetration probe with NTC temperature sensor

Waterproof immersion/penetration probe (NTC temperature sensor) for temperature measurements in liquids and semi-solid media – measuring range -50 to +150 °C, accuracy ±0.2 °C (-25 to +74.9 °C)

Order Number: 0615 1212

Robust air probe with NTC temperature sensor

Robust air probe (NTC temperature sensor) with a short response time, for measuring air temperature – measuring range -50 to +125 °C, accuracy ±0.2 °C (-25 to +80 °C)

Order Number: 0615 1712

Clamp probe with NTC temperature sensor for measurements on pipes (Ø 6-35 mm)

Clamp probe (NTC temperature sensor) for measuring the surface temperature of pipes (Ø 6-35 mm) – measuring range -40 to +125 °C

Order Number: 0615 5505

Robust air temperature probe (TC type K) – measuring range: -60 to +400 °C

Order Number: 0602 1793

Fast-action surface probe with sprung thermocouple strip

Fast-action surface probe (TC type K) – measuring range -60 to +300 °C, short-term up to +500 °C

Order Number: 0602 0393

Fast-reaction paddle surface probe (TC type K) - Measuring range: - 0 to +300°C

Order Number: 0602 0193

Efficient, waterproof surface probe with small measurement head

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Order Number: 0602 0693

Fast-action, angled surface temperature probe (TC type K) for flat and uneven surfaces – measuring range: -60 to +300 °C

Order Number: 0602 0993

Magnetic probe (TC type K) - for surface temperatures

Surface temperature probe with magnet (TC type K), adhesive power 20 N – Measuring range -50 to +170°C

Order Number: 0602 4792

Magnetfühler, Haftkraft ca. 10 N, mit Haft-Magneten

Surface temperature probe with magnet (TC type K), adhesive power 10 N – Measuring range -50 to +400°C

Order Number: 0602 4892

Waterproof surface probe with widened measurement tip

Waterproof surface temperature probe with widened measuring tip (TC type K) for flat surfaces – measuring range -60 to +400 °C

Order Number: 0602 1993

Temperature probe with Velcro (TC Type K)

Order Number: 0628 0020

Pipe wrap probe for pipe diameter 5 to 65 mm

Temperature probe (TC type K) with clamping bracket for measurements on pipes with Ø 5-65 mm – Measuring range -60 to +130°C, briefly up to +280°C

Order Number: 0602 4592

Clamp probe (TC type K) for temperature measurements on pipes with Ø 15-25 mm – Measuring range -50 to +100°C, briefly up to +130°C

Order Number: 0602 4692

Efficient and fast-action immersion probe, waterproof

Flexible, fast-action immersion probe (TC type K) – measuring range: -60 to +1000 °C

Order Number: 0602 0593

Fast-action, waterproof immersion/penetration probe

Fast-action immersion/penetration probe (TC type K) – measuring range: -60 to +800 °C

Order Number: 0602 2693

Immersion measuring tip with TC plug type K - for fast temperature measurements

Order Number: 0602 5792

Immersion measurement tip, flexible, for measurements in air

Flexible immersion measuring tip (TC type K) - Measuring range: -40 to +1000°C

Order Number: 0602 5693

Waterproof immersion/penetration probe (TC type K) – measuring range -60 to +400 °C

Order Number: 0602 1293

Flexible, low-mass immersion measurement tip

Exceptionally fast temperature probe (TC Type K)

Order Number: 0602 0493

Wasserdichter Lebensmittelfühler aus Edelstahl (IP65)

Waterproof stainless steel food probe (TC type K) - measuring range: -60 to +400°C

Order Number: 0602 2292

Thermocouple with TC adapter, flexible, 800 mm long

Flexible thermoelectric couple (TC type K, glass fibre) – Measuring range: -50 to +400°C

Order Number: 0602 0644

Thermocouple with TC adapter, flexible, length 1500 mm

Flexible thermoelectric couple (TC type K, glass fibre) – measuring range -50 to +400°C

Order Number: 0602 0645

Thermocouple with TC adapter, flexible, 1500 mm long, PTFE

Flexible thermoelectric couple (TC type K, PTFE) – measuring range -50 to +250°C

Order Number: 0602 0646

Flexible temperature probe (digital) with Pt100 temperature sensor: for temperature measurements in locations that are difficult to access and in liquids – measuring range -100 to +260 °C

Order Number: 0618 0071

Robust, fast-action air probe (digital)

Order Number: 0618 0072

Immersion/penetration probe (digital) with Pt100 temperature sensor: for temperature measurements in liquids and pastes – measuring range -100 to +400 °C, accuracy up to ±0.15 °C

Order Number: 0618 0073

Glass-coated laboratory probe (Pt100 temperature sensor, digital) for temperature measurements in aggressive media – measuring range -50 to +400 °C

Order Number: 0618 7072

High-precision immersion/penetration probe (digital)

High-precision immersion/penetration probe (Pt100 temperature sensor, digital) for temperature measurements in liquids and pastes – measuring range -80 to +300 °C, accuracy up to ±0.05 °C

Order Number: 0618 0275

Pipe wrap probe with NTC temperature sensor for measurements on pipes (Ø 5-65 mm)

Pipe wrap probe (NTC temperature sensor) for measuring the surface temperature of pipes (Ø 5-65 mm) – measuring range -60 to +130 °C

Order Number: 0615 5605

testo 115i - Clamp thermometer operated via smartphone

Order Number: 0560 2115 02

Velocity

Hot wire probe (digital) with Bluetooth^®including temperature and humidity sensor: for measurements in ventilation ducts – measuring range 0 to +50 m/s, -20 to +70 °C, 5 to 95% RH

Order Number: 0635 1571

Hot wire probe (digital) including temperature and humidity sensor, wired: for measurements in ventilation ducts – measuring range 0 to +50 m/s, -20 to +70 °C, 5 to 95% RH

Order Number: 0635 1572

Hot wire probe head including temperature and humidity sensor: for attachment to extendable telescope for air velocity probes with universal handle – measuring range 0 to +50 m/s, -20 to +70 °C, 5 to 95% RH

Order Number: 0635 1570

Vane probe (Ø 16 mm, digital) with Bluetooth® including temperature sensor: for measurements in ventilation ducts – measuring range +0.6 to +50 m/s, -10 to +70 °C

Order Number: 0635 9571

Vane probe (Ø 16 mm, digital) including temperature sensor, wired: for measurements in ventilation ducts – measuring range +0.6 to +50 m/s, -10 to +70 °C

Order Number: 0635 9572

16 mm vane probe head including temperature sensor; for attachment to extendable telescope for air velocity probes with universal handle – measuring range +0.6 to +50 m/s, -10 to +70 °C

Order Number: 0635 9570

Hot wire probe (digital) including temperature sensor, wired: for measurements in ventilation ducts – measuring range 0 to 30 m/s, -20 to +70 °C

Order Number: 0635 1032

Vane probe (Ø 16 mm, digital), wired: for measurements in ventilation ducts – measuring range +0.6 to +50 m/s

Order Number: 0635 9532

Fume cupboard probe (digital), wired: for measuring inflow speed and exhaust air volume flow in fume cupboards according to DIN EN 14175-3/-4 – measuring range 0 to 5 m/s, 0 to +50 °C

Order Number: 0635 1052

High-precision vane probe (Ø 100 mm, digital) with Bluetooth^® including temperature sensor: for measurements at air outlets in cleanrooms and at plate outlets, ventilation grilles or swirl outlets – measuring range +0.1 to +15 m/s, -20 to +70 °C

Order Number: 0635 9371

High-precision vane probe (Ø 100 mm, digital) including temperature sensor, wired: for measurements at air outlets in cleanrooms, as well as at plate outlets, ventilation grilles or swirl outlets – measuring range +0.1 to +15 m/s, -20 to +70 °C

Order Number: 0635 9372

High-precision 100 mm vane probe head including temperature sensor: for attachment to extendable telescope for air velocity probes with universal handle or to a universal Bluetooth^® or cable handle – measuring range +0.1 to +15 m/s, -20 to +70 °C

Order Number: 0635 9370

Vane probe (Ø 100 mm, digital) with Bluetooth^® including temperature sensor: for measurements at ceiling/air outlets and at plate outlets, ventilation grilles or swirl outlets – measuring range +0.3 to +35 m/s, -20 to +70 °C

Order Number: 0635 9431

Vane probe (Ø 100 mm, digital) including temperature sensor, wired: for measurements at ceiling/air outlets and at plate outlets, ventilation grilles or swirl outlets – measuring range +0.3 to +35 m/s, -20 to +70 °C

Order Number: 0635 9432

100 mm vane probe head: for attachment to extendable telescope for air velocity probes with universal handle or to universal Bluetooth^® or cable handle – measuring range +0.3 to +35 m/s, -20 to +70 °C

Order Number: 0635 9430

testo 405i – thermal anemometer with smartphone operation

Order Number: 0560 1405

testo 410i – vane anemometer with smartphone operation

Order Number: 0560 1410

Hot ball probe (Ø 3 mm) - for flow and temperature

Hot ball probe (Ø 3 mm, digital), incl. temperature sensor, fixed cable: for measurement in non-directional air flows – measuring range 0 to 10 m/s, -20 to +70 °C

Order Number: 0635 1051

Hot wire probe (Ø 7.5 mm, digital), incl. temperature sensor, fixed cable: for measurement in ventilation ducts, at plate outlets, ventilation grilles – measuring range 0 to 20 m/s, -20 to +70 °C

Order Number: 0635 1026

Sets

testo 440 delta P Air Flow ComboKit 1 with Bluetooth^® for carrying out measurements in ventilation ducts and at air/ceiling outlets. Convenient measurement of air velocity and volume flow (with vane probe Ø 100 mm and hot wire probe head Ø 9 mm), differential pressure, humidity and temperature in ventilation ducts and at air/ceiling outlets

Order Number: 0563 4409

testo 440 delta P Air Flow ComboKit 2 with Bluetooth^®: for carrying out measurements in ventilation ducts, at air/ceiling outlets and in offices. Convenient measurement of air velocity and volume flow (with vane probe Ø 100 mm or vane probe head Ø 16 mm), differential pressure, humidity and temperature

Order Number: 0563 4410

Accessories

BLUETOOTH®-/IRDA printer with Bluetooth® and IrDA interface for printing out measurement data and graphs from compatible Testo measuring instruments or Testo Apps

Order Number: 0554 0621

Measuring tripod for IAQ and comfort level measurements, to ensure standard-compliant, secure positioning of measuring instrument and probes including transport bag

Order Number: 0554 1591

Measuring tripod for flow measurements, for standard-compliant and secure positioning of probes

Order Number: 0554 1592

Universal Bluetooth® handle for connecting probe heads

Bluetooth^® handle for connecting probe heads: transmits readings conveniently via Bluetooth

Order Number: 0554 1111

Universal cable handle for connecting probe heads

Cable handle for connecting probe heads: transmits readings via cable

Order Number: 0554 2222

testovent 417 volume flow straightener set

testovent 417 flow straightener set for volume flow measurement, consisting of the testovent 417 volume flow straightener and the testovent 417 funnel set

Order Number: 0554 4173

testovent 417 funnel set for volume flow measurement, consisting of a funnel for plate outlets (Ø 200 mm) and a funnel for ventilation grilles (330 x 330 mm), used with 100 mm vane

Order Number: 0563 4170

testo 318 - Endoscope

Order Number: 0563 3185

Accessories for measuring instrument

USB mains unit incl. cable

Order Number: 0554 1105

Connection hose, silicone - max. load capacity up to 700 hPa (mbar)

Order Number: 0554 0440

Connection hose silicone-free for differential pressure measurement, length 5 m, load up to maximum 700 hPa, (mbar)

Order Number: 0554 0453

Certificates

ISO pressure calibration certificate; with 5 measuring points distributed over the measuring range; accuracy > 0.6 % of f.v.

Order Number: 0520 0005

ISO calibration certificate for pressure; calibration at selectable measuring points within the range pe/pabs = -1 to 5001 bar

Order Number: 0520 0105

DAkkS pressure calibration certificate; with 5 measuring points distributed over the measuring range, accuracy > 0.6 % of f.v.

Order Number: 0520 0225

Further accessories measuring instrument/probes

Flow straightener testovent 417

Order Number: 0554 4172

Transport and Protection

Combi-case for testo 440 and multiple probes; for protecting and transporting the testo 440 (dP) air velocity and IAQ measuring instrument and multiple probes

Order Number: 0516 4401

Service case for volume flow measurement; for protecting and transporting the testo 440 (dP) air velocity and IAQ measuring instrument, probes and accessories for measuring volume flow

Order Number: 0516 4900

Applications

Long-term monitoring of indoor air quality

Poor indoor air quality due to excessive concentrations of CO₂ can cause tiredness, lack of concentration and even illness. With its menu for recording readings, the testo 440 air velocity and IAQ measuring instrument is ideal for monitoring the indoor air quality. Enter the measurement time and the measuring cycle – and, for example, track the change in CO₂ concentration or humidity and temperature values over the course of the day. Simply choose between probes with Bluetooth or fixed cable for CO₂, CO or humidity (please order probes separately).

Measure CO2 concentration for assessing indoor air quality with CO2 probe and testo 440

Convenience and maximum flexibility for duct and outlet measurements

With our large range of air velocity probes (please order separately), you can carry out simple and convenient measurements even at locations that are difficult to access in ventilation ducts or at air outlets:
you will even find it easy to carry out measurements in particularly large ducts. This is because the extendable telescope on the hot wire and vane probe (Ø 16 mm) with universal handle can be further extended using the telescope extension – enabling you to attain a total length of 2 metres.
Carry out measurements at air/ceiling outlets effortlessly and without using a ladder. Fit your vane probe (Ø 100 mm) with the telescope with 90° angle and, if necessary, with the telescope extension (both can be ordered separately).
Greater freedom thanks to Bluetooth: the air velocity probes with Bluetooth have no inconvenient cable connection to the measuring instrument, and they transmit readings up to a distance of 20 m. Press the button on the probe to operate the measuring instrument – for example, to start and stop a series of measurements (timed mean calculation).
Attach the testo 440 air velocity and IAQ measuring instrument to metal surfaces (e.g. ducts) easily using the practical magnets.
Benefit from fast calculation of the volume flow: in the “volume flow” measurement menu of the multifunction measuring instrument, configure the dimensions and geometry of the duct cross-section – the measuring instrument shows you the volume flow straight away.

Volumetric flow measurement in ventilation ducts with vane probe (Ø 16 mm) and testo 440

Turbulence measurement in accordance with EN ISO 7730 / ASHRAE 55

Determine the degree of turbulence and the draught risk in the workplace: draught restricts the comfort level and is the most common cause of complaints about the indoor climate. The turbulence probe (please order separately) measures air velocity and air temperature, and automatically calculates the draught risk and the 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 (please order separately). This makes it very easy to position turbulence probes in compliance with the standards.

Determining the degree of turbulence with turbulence probe and testo 440

Range of probes for cleanrooms and laboratories

The testo 440 air velocity & IAQ measuring instrument is also ideal for a wide variety of applications in cleanrooms and laboratories in conjunction with the following probes:

High-precision flow measurement in fume cupboards with the fume cupboard probe
Thanks to the low start-up speed of 0.1 m/s, the high-precision vane probe (Ø 100 mm) is ideal for laminar flow measurements in cleanrooms. It is available as a variant with Bluetooth or with fixed cable
To measure the humidity in cleanrooms, we recommend the high-precision humidity/temperature probe (0636 9771 or 0636 9772). With an accuracy of ±(0.6 %RH + 0.7% of m.v.) (0 to 90 %RH), it also meets the requirements for humidity measurements in this particularly sensitive area
Use the high-precision digital Pt100 temperature probes, for example, for high-precision comparative measurements in calibration laboratories, temperature measurements in chemical laboratories or in the cosmetics industry as well as for determining the temperature distribution in refrigerators and conditioning cabinets

Volumetric flow measurement in fume cupboards with fume cupboard probe and testo 440

Downloads

Product Brochures

Data sheet testo 440 (pdf, 3.12 MB)

Manuals

Software

Firmware update testo 440 (v1.0.8, 3.15 MB) see instruction manual for instructions on how to update your device

This meter uses a sensor to start up. Click here for filter selection.

Buy now