ET Enterprises Limited manufactures and supplies the Electron Tubes brand of photomultiplier tubes and electronics that were previously made by EMI Electronics, Thorn EMI Electronics, and Electron Tubes Ltd. The history of ET Enterprises Limited can be traced back to the 1930s when it first became involved with light detection technologies. We offer a wide choice of high- quality photomultipliers, photodetector modules and associated electronics, together with comprehensive technical and application support, and competitive prices. Now a subsidiary of Ludlum Measurements Inc., Texas, Et Enterprises Limited has the benefit of the combined resources of the production facilities of ADIT, a US based producer of photomultiplier tubes, and ET Enterprises' development facilities.