Testo 540 Pocket-sized lux meter


The testo 540 lux meter can be used to measure both artificial and natural light and provides you with a quick and easy means of measuring lighting conditions in the workplace.

Application: Workshops, Offices,Shops, etc..


Tax /GST included

The testo 540 lux meter is a pocket-sized entry level model designed specifically for carrying out spot checks. The light sensor is modelled on the spectral sensitivity of the human eye and is ideal for measuring lighting conditions in a variety of different workplaces.

The compact, easy-to-use lux meter has a number of useful functions and features including a large, easy-to-read display, min/max values which can be shown at the touch of a button, a hold function that allows you to freeze the last reading and a protective cap for safe storage.

Product benefits:

  • For quick and easy light measurements in the workplace

  • Sensor is modelled on the spectral sensitivity of the human eye

  • Hold function, min/max values

  • Protective cap for safe storage 

30 Items

Data sheet

Testo 540
Measuring Range
0 to 99999 Lux
±3 Lux or ±3 % (compared to reference Class B, DIN 5032 Part 7)
1 Lux (0 to 19999 Lux) 10 Lux (Remaining Range)
2 AAA micro batteries
Measuring Rate
0.5 s
Operating Conditions
0 to +50 °C
Storage Conditions
-40 to +70 °C
Battery Life
200 h (average, without display illumination)
Protection class
133 x 46 x 25 mm
95 g (incl. batteries and protective cap)
2 years