Testo 545 Digital Lux Measurement Kit with Smart app connectivity

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The compact Lux meter testo 545 with App connection is the ideal solution for simple, fast and precise determination of the light intensity of all common light sources.

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Product Specification unless deselected above

More Information
Boxed Weight (kg) 0.360
Brand Testo
Available Outside the UK? Yes
Illuminance is a decisive factor for productivity, well-being and health, especially in workplaces. Light sources that are too bright dazzle, while those that are too dark can lead to concentration problems and headaches.
With the Lux meter testo 545 you can measure the illuminance of all common light sources - quickly, easily and precisely. The measuring instrument is compatible with almost all commercially available LEDs and thus ensures you a wide range of applications. By automatically calculating the time and point average value, the Lux meter shows you all relevant information at a glance.
The testo 545 is perfectly complemented by the testo Smart App. This not only allows you to configure the measuring instrument, display and store the measured values, and document them in a particularly convenient way. The App also turns your smartphone into a second display. 
• Simple, fast and precise measurement of illuminance (Lux) according to the V-lambda curve for all common light sources
• Wide range of applications due to LED compatibility (except single-colour blue LED)
• Fast in-app configuration, graph history, second screen and measurement data memory in the testo Smart App
• Audible alarm sounds if a limit value is exceeded

Technical Data


Measuring range

0 to 100,000 lux

Accuracy +-1 digit

Class C, corresponding to DIN5032-7/ EN13032-1, appendix B

F1= 6% = V (Lambda) adjustment

F2= 5% = cos-true evaluation

Total ≤ 15%

+- 3% of m.v. +-1 digit


0.1 Lux (<10,000 Lux)

1 Lux (≥10,000 Lux)

General technical data




Instrument: 149 x 60 x 28mm

Probe: 134 x 54 x 23mm

Cable Length: 1.4m

Operating temperature

Instrument: -20 to +50 °C

Probe: 0 to +50 °C

Battery type

3 x AA

Battery life


Storage temperature

-20 to +50 °C

Housing Material



What's in the Box

testo 545 Digital Lux measuring instrument

Transport bag

3 x AA Batteries

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