+44 (0) 1904 488 599

Welcome, I’m Alex Davis. Yorlab prides itself on its professional but personal approach to customer service and we are committed to ensuring that we can meet all of your laboratory needs – just give us a call on 01904 488599 or 0191 526 0897

Alex Davis, Managing DirectorAlex Davis, Managing Director

540 Light Intensity Measuring Instrument

Incl. protective cap, batteries and calibration protocol. The sensor of the testo 540 is adapted to the spectral sensitivity of the eye. This makes testo ideal for the measurement of light intensity. The Hold function allows an easy readout of the measurement values. Max. and min. values are displayed at the press of a button. testo 540 is very handy, small and easy to operate.
  • Hold function and max. / min. values.
  • Incl. calibration protocol.
  • Protective cap for safe storage.
  • Including wrist strap and belt holder.
  • Sensor adapted to spectral sensitivity of the eye.
  • Display light.
Technical Data:
Battery type:2 batteries type AAA
Battery life:20 h
Weight:95 g
Dimensions:133 x 46 x 25 mm
Probe type (LUX)
Measuring range:0 to 99999 lx
Accuracy:± 3 % (compared with reference)
Resolution:1 lx (0 to 19999 lx)
10 lx (remaining range)
testo  540 Light Intensity Measuring Instrument
TypePUOrder No. Price/Unit/GBP 
testo 54015718254-130.15Order