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Testo 440 - Lux kit

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The Testo 440 Lux kit is designed to measure light levels in a wide range of applications within the workplace using a remote / wired probe.  This versatile instrument determines the levels of illuminance according to the V-lambda curve, thus can be used or all common light / lux sources including white or warm light LEDs (K< 5000).  The 440 handset is a multifunction measuring instrument which can be used with a number of different optional indoor air quality probes and the wireless Bluetooth probes.

Product Features

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

Instrument product options

1. Select a model (1 available)

Model subtotal: £479.00
Total (excl VAT): £479.00
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2. Select accessories (44 available)

3. Select a calibration (2 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 for long-term measurements simply enter the measurement time and measuring cycle in the measuring instrument and record measurement data trends
  • 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. Lux probe
  • Large, backlit colour display


Probe part No.      0635 0551

Measuring range     0 to 100,000 Lux

Accuracy   Class C according to DIN 5032-7                           

Velocity resolution     0.1 Lux <10,000 Lux : 1 Lux > 10,000 Lux



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 video

Testo 440 product range overview



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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