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Testo 440 - Indoor Comfort ComboKit

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The Testo Indoor Comfort ComboKit is designed to handle all relevant measurements in order to evaluate the indoor air quality in buildings as well as the determination of the draught risk and degree of turbulence in workplace in accordance with EN ISO 7730 and ASHRAE 55. The kit comes complete with the Testo 440 air velocity and IAQ measuring instrument, the CO2 probe with Bluetooth including temperature and humidity sensor, the wired turbulence probe and a system case.

Product Features

  • Range of accessories
  • Document downloads
  • Instrument video
  • Instrument FAQs

Instrument product options

1. Select a model (1 available)

Model subtotal: £1,329.00
Total (excl VAT): £1,329.00
Continue to select accessories

2. Select accessories (44 available)

3. Select a calibration (1 available)



  • A compact hand-held measuring instrument with intuitive measurement menus and a wide selection of air velocity and IAQ probes (optional accesories)
  • Clearly structured measurement menus.
  • Easy storage and evaluation of measurement data. Measurement data memory for up to 7500 measurement protocols, which can be read via a USB port and further processed as a CSV file on the computer (e.g. with Excel)
  • Practical magnets for easy attachment of the measuring instrument to metal surfaces (e.g. ducts)
  • Automatic detection of probes, e.g. IAQ and air velocity probes.
  • Large, backlit colour display

Scope of standard supply

Testo 440 air velocity and IAQ measuring instrument, 3 x AA batteries, USB cable and manufacturers calibration protocol

Turbulence probe with fixed cable (cable length 1.4 m) and calibration protocol (0628 0152)

CO2 probe* with Bluetooth, including temperature and humidity sensor (consisting of CO2 probe head and Bluetooth handle); 4 x AA batteries, table stand and calibration protocol (0632 1551)

Combi style case for testo 440 and CO2 probe

Important note

BSRIA Instrument Solutions recommends that the optional Testo measuring tripod is used with the air velocity probe to ensure standard-compliant, secure positioning of the measuring instrument and probes.  This item comes including a transport bag.  Testo part number: 0554 1590



Probe part No.      0628 0152

Air velocity sensor type      Hot wire

Air velocity range      0 to 5 m/s

Air velocity accuracy      ± (0.03 m/s + 4 % of mv)

Air velocity resolution      0.01 m/s

Temperature sensor type      NTC

Temperature measuring range     0 to + 50 °C

Temperature accuracy     ± 0.5 °C

Temperature resolution     0.1 °C


Probe part No.      0632 1551

CO2 range     0 to 10,000 ppm

CO2 accuracy      ± (50 ppm + 3 % of mv) : 0 to 5000 ppm, ± (100 ppm + 5 % of mv) : 5001 to 10000 ppm

CO2 resolution      1 ppm

Humidity sensor type      Capacitive

Humidity measuring range     5 to 95 % rh

Humidity accuracy     ± 3 % rh (10 to 35 % rh),  ± 2 % rh (35 to 65 % rh), ± 3 % rh (65 to 90 % rh), ± 5 % rh (remaining range)

Humidity resolution     0.1 % rh

Temperature sensor type      NTC

Temperature measuring range     - 10 to + 50 °C

Temperature accuracy     ± 0.5 °C

Temperature resolution     0.1 °C



Testo 440 product range BSRIA data sheet

  • Technical Document
  • PDF file
  • 4 MB

Testo 440 user manual

  • Technical Document
  • PDF file
  • 3 MB

Testo air velocity and IAQ Bluetooth probe user manual

  • Technical Document
  • PDF file
  • 897 KB

Testo air velocity and IAQ probe user manual

  • Technical Document
  • PDF file
  • 356 KB

Demonstration videos

Testo 440 product range overview
Testo 440 product overview in IAQ applications



When using a wireless Bluetooth probe how far from away from the handset will the probe register a signal ?


Typically the probe will transmit distances up to 10 m (line of sight).


Can you connect two wireless Bluetooth probes to a 440 handset ?


Unfortunately no.  The handset is designed to work with a single wireless Bluetooth probe, a single wired probe and an additional Type K mini plug style thermocouple can additionally be fitted as well.

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