DK242 CM SM245 SM301 1/8m SM32ProForSM301 RS 232 AD111 convert AD 1/4m sdf to txt Detector Filter Wheel Executable sdf EX monochroamtor Mono CM112 Visual C++ spectrometer 111 SM301-EX DK SM32Pro AB Source 300 DK480 CM110 USB SM301EX DK240 131 SM642 AB300 SM445 1/2m NI PCI Demo spectrometer. SM32Pro SM303 32bit AD131 Labview GPIB SMProMX monochromator Visual Basic SM304