MPPC modules. Modules (SiPM modules) that contain an MPPC capable of detecting extremely low-level lightSPAD (single photon avalanche diode) is used in single-photon detection applications, where it is often involved in photon counting. Hamamatsu offers SPAD array and module products, and we can integrate these detectors with ASIC and customize our products to fit into your unique system. SPAD sensors can be used in LiDAR, optical tomography, quantum computing, and other low-light-level applications.