The testo 545 digital lux meter is designed for professional and accurate measurement of illuminance (Lux) across all standard light sources, including most LED types (excluding single-colour blue). It ensures lighting conditions meet safety, comfort, and productivity standards in environments like offices, factories, and schools.

This compact device follows the V-lambda curve for precision aligned with human eye sensitivity. It includes built-in audible alarms for limit violations and calculates point and time averages, providing clear insights at a glance.

The testo Smart App enhances usability by allowing fast instrument configuration, data logging, graphing, and second-screen functionality via a smartphone. This simplifies both real-time monitoring and report generation, making it an ideal solution for facility managers, occupational health professionals, and lighting auditors.