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Lux meter testo 545

Compact meter for simple, fast, and precise measurement of illuminance (lux) of all common light sources according to the V-lambda curve to ensure productivity, performance, and health at workplaces. Measurement data can be transmitted to smartphones or tablets via Bluetooth®. The connection to the free testo Smart App enables configuration of the device as well as display, storage, and documentation of measurements.

  • Wide range of applications due to LED compatibility (except single-colour blue LED)
  • Acoustic alarm when limit values are exceeded
  • Time and point averaging
  • Quick in-app configuration, graphic history, second screen, and measurement data memory in the testo Smart App
  • Display illumination
  • Hold function
  • Display of min./max. value


Scope of supply: Lux meter, transport bag, calibration protocol, batteries

Measuring range:0 ... 100000 lx
Accuracy:±3 % of measuring range ± 1 Digit (Class C, corresponding to DIN 5032-7/EN 13032-1, Appendix B, f1 = 6 % = V (Lambda) adjustment, f2 = 5 % = cos-true evaluation, Total ≤15 %)
Resolution:0.1 lx (<10000 lx), 1 lx (≥10000 lx)
Compatibility mobile device:Requires iOS 13.0 or newer, Android 8.0 or newer, Bluetooth® 4.2.
Cable length:1.4 m
Dimensions probe (W x D x H):54 x 134 x 23 mm
Power supply:3 x AA
IP code:IP 40 device, IP 20 probe
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