Device for measuring illuminance, luminance, PAR, irradiance. Storage of maximum, minimum, average value and the integral Q(t), RS232 C output for data transfer in real time to a PC or printer. Functions: REL, HOLD and auto power off which can be disabled, IP 67 protection degree. Complete with carrying case, instruction manual, 4 batteries, Software DeltaLog 9. LP471.. series probes with SICRAM module are suitable. The probes and cables for data download have to be ordered separately