Hamamatsu Photonics K.K. has announced the development of the world’s smallest high-voltage power supply (HVPS) module with high stability and low noise. The new HVPS module (part number: C14210-14) is less than half the size and weight of Hamamatsu’s conventional product. Its miniaturisation was made possible by a newly developed proprietary manufacturing process for layering high isolation circuits on high voltage circuits. The new HVPS module can be used to power photomultiplier tubes inside compact, portable instruments.