Ultra Low Noise Real-Time Digital Pulse Processor (DPP) and Scintillation Detector Spectrometer in One Package. The handheld nanoMCA-II-SP is the ultimate device in the nanoMCA family. It is a more powerful version of the original nanoMCA-SP device, and includes a built-in PMT preamplifier, as well as three additional input/output channels, an improved sampling period, and a wider range of pulse-shape time constants. See the full list of features below.