SensL’s second-generation SL family of low-light silicon photomultipliers features a four-times-higher signal-to-noise ratio than its previous generation products and provides output uniformity of ±10%. The detectors require 30 V for operation, reducing system complexity and cost. Select versions of the SL product family are offered with better than 1% breakdown voltage uniformity. The photomultipliers are produced in a standard CMOS process, enabling new applications in medical imaging, hazard and threat detection, biophotonics and lidar. The MicroSL 1- and 3-mm detectors offer different photosensitive active areas optimized for dynamic range and detection efficiency, and the ArraySL 13.4- and 46-mm-sq detectors are designed for large-area photomultiplier tube replacement.