Day visibility retroreflectometer LTL3500

night visibilityfor horizontal pavement marking

A new generation of road marking retroreflectometer. It´s based on the latest technological developments and with modern design and materials. Very easy to calibrate and operate. RL and Qd retroreflectometer measurements. LTL3500 is part of a new generation of DELTA retroreflectometer instruments for measuring retroreflection of road markings. The instrument is based on the latest technological developments and with modern design and materials. LTL3500 is, like all other DELTA instruments, very easy to calibrate and operate, we like to say: “very user-friendly”. And the instrument is of course robust and long lasting – like our earlier generations of road marking retroreflectometers – and on top of this small in size and light in weight RL and Qd retroreflectometer measurements The LTL3500 model is supporting not only night visibility (RL), but also daytime visibility (Qd) according to European and US standards. Where RL is a measure of the visibility of the nighttime retroreflected light, the Qd is a measure of the daytime visibility under diffuse illumination during daytime. In particular performance of markings at nighttime is a very important factor in ensuring safe driving conditions besides being a key parameter in making automated vehicles recognize the markings allowing good navigation abilities. Only measurement with a retroreflectometer like LTL3500 is able to tell if a marking performs according to standards LTL3500 measures daytime visibility and nighttime visibility under dry and wet conditions as well as continuous wetting. LTL3500 measures RL from 0 to 4.000 mcd/lx/sqm and Qd from 0 to 318 mcd/lx/sqm.