The testo 540 lux meter is an entry-level model and was specially developed for rapid spot measurement in workplaces, offices and shops. The sensor is based on the spectral sensitivity of the human eye and is ideal for assessing illuminance.
The measured values can be conveniently read on the illuminated display, the minimum and maximum values are displayed at the touch of a button. The hold function enables a comfortable reading of the measured values. The handy, easy-to-use lux meter can be stowed safely thanks to the supplied protective cap until the next measurement.