German-made Illuminance Tester PCE-RT 11Ra, Rz, Rq and Rt Large OLED display with backlight with piezoelectric probes for accurate measurement of illuminance. The PCE-RT-11 is a portable measuring instrument for determining surface roughness according to Ra, Rz, Rq and Rt in a single device. The compact illuminance tester is specifically designed to measure illuminance quickly.Roughness is a surface physics term that describes nonuniformity in surface height. The roughness tester operates according to the same piezoelectric microprobe principle as the highly accurate laboratory measuring equipment. The easy handling and high repetition accuracy of the illuminance tester are characteristic of this device. Touch the button and the roughness tester's piezoelectric microprobe scans the surface within seconds and digitally displays Ra, Rz, Rq, or Rt values according to a preselected cutoff length.- Real-time battery display - USB interface - simple calibration - also applied to cylinders and slopes - with sliders protecting probes - Wide measuring area - OLED display - Based on roughness - Piezoelectric probe - EmbiTech with backlight 031-396-8178wwww.mb-tech.kr<br>