Datalogger Photo-radiometer Thermometer which performs photometric, radiometric, PAR, temperature measurements. Two inputs. Function as datalogger: 30,000 samples, REL, Record, Q (integration), RS232C serial output. Complete with instrument, carrying case, instruction manual, 9V battery, Software DeltaLog1. LP9021.. series probes complete with electronics are suitable. The probes and cables for data download (9CPRS232) have to be ordered separately.