1930s - EMI
As part of EMI, developed light sensing techniques for use in the first electronic high definition television system.
1940s - Photon Counting System
Development and introduction of the world's first photon counting system for use in optical astronomy.
1950s - New PMT Designs
Invented and introduced a completely new series of photomultiplier designs and first commercial production of photomultipliers commenced in West London.
1990s - Electron Tubes Ltd.
Electron Tubes Ltd. formed. Modular photon counting systems added to the photomultiplier range.
2007 - ET Enterprises Ltd.
Ludlum Measurements, Inc. acquired the photomultiplier division of Electron Tubes Ltd. and the name changed to ET Enterprises Ltd.
2012 - Plowden & Thompson
Acquisition of Plowden & Thompson glass manufacturing business to secure the long term availability of specialist glass used in production of photomultipliers.
2016 - Expanded Product Range
Further expansion of our product range to include detector modules and high QE and compact photomultipliers.