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testo 440 - Air velocity and IAQ measuring instrument

Order-Nr.  0560 4401

  • Intuitive: Clearly structured measurement menus for volume flow, 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 Overview: Large graphic display with parallel display of 3 readings

  • Reliable: Internal memory for data storage and USB port for data export

Precise, reliable measurement of all air velocity and IAQ parameters with just one measuring instrument – the testo 440. This multifunction measuring instrument is intuitive and easy to use, thanks to its clearly structured measurement menus. Adjusting air conditioning and ventilation systems, monitoring air quality, and carrying out comfort level measurements are all possible without the hassle of juggling different devices and tools. Enjoy the versatility of using your choice of high quality digital probes with just one measuring instrument.

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Product Description

Use the testo 440 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.

 

Measure in no time with the testo 440 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, 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 testo 440 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 testo 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 testo 440 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 testo 440 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 testovent 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

 

Delivery Scope

testo 440 air velocity and IAQ measuring instrument, 3 AA batteries, USB cable, and calibration protocol
Temperature - NTC

Measuring range

-40° to 302 °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) / ±0.3 °C (-25 to +74.9 °C)

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

±0.5 % of mv (Remaining Range)

Resolution

0.1 °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

0.1 °F / 0.1 °C
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 testo Smart Probe, 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

-4.0° to 122.0 °F / -20 to +50 °C

Comfort probes

Cross-Seller Turbulence probe (digital), wired
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

Details
Cross-Seller 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

Details
Cross-Seller 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

Details
Cross-Seller 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

Details
Cross-Seller 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

Details
Cross-Seller CO probe (digital) with Bluetooth®
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

Details
Cross-Seller CO probe (digital), wired
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

Details
Cross-Seller CO probe head
CO probe head: for attachment to universal Bluetooth® or cable handle – measuring range 0 to 500 ppm

Order Number: 0632 1270

Details
Cross-Seller Globe-Thermometer ~ 150 mm, TE Typ K, zum Messen der Strahlung
Globe probe Ø 5.9"

Order Number: 0602 0743

Details

Humidity probes

Cross-Seller Humidity/temperature probe (digital) with Bluetooth®
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

Details
Cross-Seller Humidity/temperature probe (digital), wired
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

Details
Cross-Seller Humidity/temperature probe head
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

Details
Cross-Seller High-precision humidity/temperature probe (digital) with Bluetooth®
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

Details
Cross-Seller High-precision humidity/temperature probe (digital), wired
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

Details
Cross-Seller High-precision humidity/temperature probe head
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

Details
Cross-Seller Robust humidity/temperature probe (digital) - for temperatures up to +180 °C, wired
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

Details
Cross-Seller 605i

Order Number: 0560 2605 03

Details

Pressure Probe

Cross-Seller 510i
testo 510i – differential pressure measuring instrument with smartphone operation

Order Number: 0560 1510

Details
Cross-Seller 549i

Order Number: 0560 2549 03

Details

Temperature probes

Cross-Seller 905i
testo 905i – thermometer with smartphone operation

Order Number: 0560 1905

Details
Cross-Seller GDA-2020-2000x1500-testo-805i-US-V2.jpg
testo 805i – infrared thermometer with smartphone operation

Order Number: 0560 1805

Details
Cross-Seller 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

Details
Cross-Seller 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

Details
Cross-Seller 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

Details
Cross-Seller Robuster Luftfühler, TE Typ K
  Rugged air probe, T/C Type K  

Order Number: 0602 1793

Details
Cross-Seller Fast-action surface probe with sprung thermocouple strip
Fast-action surface probe with spring thermocouple , for uneven surfaces, short-term range to +932°F, T/C Type K

Order Number: 0602 0393

Details
Cross-Seller Fast-reaction paddle surface probe
Fast-reaction paddle surface probe, for measurements in inaccessible places, e.g. narrow apertures and slots, TC Type K

Order Number: 0602 0193

Details
Cross-Seller Efficient, waterproof surface probe with small measurement head
Efficient, waterproof surface probe with small measurement head for flat surfaces, T/C Type K

Order Number: 0602 0693

Details
Cross-Seller Fast-action surface probe with sprung thermocouple strip
Fast-action surface probe with spring thermocouple for uneven surfaces, short-term to +932°F, T/C Type K

Order Number: 0602 0993

Details
Cross-Seller Flat head surface probe with telescopic handle max. 680 mm
Flat head surface probe with telescopic handle (max. 24 in.) for hard-to-reach areas, T/C Type K

Order Number: 0602 2394

Details
Cross-Seller Magnetic probe (TC type K) - for surface temperatures
Magnetic probe, adhesive force approx. 20 N, with magnets, for measurements on metal surfaces

Order Number: 0602 4792

Details
Cross-Seller 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

Details
Cross-Seller Waterproof surface probe with widened measurement tip
Waterproof surface probe with widenend measurement tip for flat surfaces, T/C Type K

Order Number: 0602 1993

Details
Cross-Seller Pipe wrap probe with velcro strip
Temperature probe with Velcro (TC Type K)

Order Number: 0628 0020

Details
Cross-Seller Pipe wrap probe for pipe diameter 5 to 65 mm
Pipe clamp probe for pipe diameter 0.2 to 2.5'', with replaceable measuring head. Measuring range to 536 °F short-term

Order Number: 0602 4592

Details
Cross-Seller Clamp probe for measurements on pipes
Clamp probe for measurements on pipes, pipe diameter 0.6 to 1'' (max. 1''), meas. range to +266 °F short-term

Order Number: 0602 4692

Details
Cross-Seller Efficient and fast-action immersion probe, waterproof
Efficient and fast-action immersion probe, waterproof, T/C Type K

Order Number: 0602 0593

Details
Cross-Seller Fast-action, waterproof immersion/penetration probe
Super-quick, waterproof immersion/penetration probe, T/C Type K

Order Number: 0602 2693

Details
Cross-Seller Tauch-Messspitze, biegsam, TE Typ K
Immersion tip, flexible
Measuring range: -328° to 1832 °F (-200° to 1000 °C)

Order Number: 0602 5792

Details
Cross-Seller Immersion tip, flexible, TC Type K
Immersion tip, flexible

Order Number: 0602 5793

Details
Cross-Seller Immersion measurement tip, flexible, for measurements in air
Flexible immersion measurement tip for measurements in air/exhaust gases (not suitable for measurements in smelters), TC Type K -328 to +2372 °F, 39" long, Ø 0.12"

Order Number: 0602 5693

Details
Cross-Seller Waterproof immersion/penetration probe, TC Type K
Waterproof immerstion/penetration probe, T/C Type K

Order Number: 0602 1293

Details
Cross-Seller Flexible, low-mass immersion measurement tip
Flexible, low-mass immersion measurement tip, ideal for measurements in small volumes such as petri dishes, or for surface measurements (e.g. attached with adhesive tape), TC Type K

Order Number: 0602 0493

Details
Cross-Seller Wasserdichter Lebensmittelfühler aus Edelstahl (IP65)
Waterproof food probe made of stainless steel (IP65)

Order Number: 0602 2292

Details
Cross-Seller Thermocouple with TC adapter, flexible, 800 mm long
Thermocouple with T/C adapter, flexible, 32 in. long, fibre glass, T/C Type K

Order Number: 0602 0644

Details
Cross-Seller Thermocouple with TC adapter, flexible, length 1500 mm
Thermocouple with T/C adapter, flexible, 60 in. long, fibre glass, T/C Type K

Order Number: 0602 0645

Details
Cross-Seller Thermocouple with TC adapter, flexible, 1500 mm long, PTFE
Thermocouple with T/C adapter, flexible, 60 in. long, PTFE, T/C Type K

Order Number: 0602 0646

Details
Cross-Seller Flexible temperature probe (digital)
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

Details
Cross-Seller Robust, fast-action air probe (digital)
Robust, fast-action air probe (digital)

Order Number: 0618 0072

Details
Cross-Seller Immersion/penetration probe (digital)
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

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

Order Number: 0618 7072

Details
Cross-Seller 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

Details
Cross-Seller 115i

Order Number: 0560 2115 03

Details

Velocity Probe

Cross-Seller Hot wire probe (digital) with Bluetooth® including temperature and humidity sensor
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

Details
Cross-Seller Hot wire probe (digital) including temperature and humidity sensor, wired
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

Details
Cross-Seller Hot wire probe head including temperature and humidity sensor
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

Details
Cross-Seller Vane probe (Ø 16 mm, digital) with Bluetooth®, including temperature sensor
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

Details
Cross-Seller Vane probe (Ø 16 mm, digital) including temperature sensor, wired
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

Details
Cross-Seller 16 mm vane probe head including temperature sensor
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

Details
Cross-Seller Hot wire probe (digital) including temperature sensor, wired
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

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

Order Number: 0635 9532

Details
Cross-Seller Fume cupboard probe (digital), wired
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

Details
Cross-Seller High-precision vane probe (Ø 100 mm, digital) with Bluetooth® including temperature sensor
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

Details
Cross-Seller High-precision vane probe (Ø 100 mm, digital) including temperature sensor, wired
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

Details
Cross-Seller High-precision 100 mm vane probe head including temperature sensor
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

Details
Cross-Seller Vane probe (Ø 100 mm, digital) with Bluetooth® including temperature sensor
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

Details
Cross-Seller Vane probe (Ø 100 mm, digital) including temperature sensor, wired
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

Details
Cross-Seller 100 mm vane probe head
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

Details
Cross-Seller 405i
testo 405i – thermal anemometer with smartphone operation

Order Number: 0560 1405

Details
Cross-Seller GDA-2020-2000x1500-testo-410i-US-V2.jpg
testo 410i – vane anemometer with smartphone operation

Order Number: 0560 1410

Details

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

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

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