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Testo 540 Pocket Lux meter

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Hold function and max./min. values, sensor adapted to spectral sensitivity of the eye

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Product Description

Product description

The 540 Pocket 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.

  • Sensor designed based on the spectral sensitivity of the human eye 
  • Quick readouts 
  • Protective cap for safe storage 
  • Compact and robust design 

The testo 540 Pocket lux meter: compact, easy-to-use, precise

The Testo 540 Pocket Lux Meter is a compact entry level model designed specifically for carrying out spot checks in the workplace, shops and offices. The light sensor is designed based 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 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. 


Technical data 

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)

Measuring rate

0.5 s

General technical data

Technical data 

Protection class



2 years

Battery type

2 AAA micro batteries

Battery life

200 h (average, without display illumination)

Storage temperature

-40 to +70 °C


95 g (incl. batteries and protective cap)


133 x 46 x 25 mm

Operating temperature

0 to +50 °C

Additional Information

Additional Information

Application Emissions, Indoor Air Quality, Pharmaceuticals & Hospitals, Production & QA , Storage & Transport


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