Operational since its founding in 1962, Ludlum Measurements, Inc. (LMI) designs and manufactures radiation detection instruments and technologies use to monitor the safety of personnel and the environment. The firm's instruments are used in a range of settings from routine personnel and material monitoring, border security, and emergency response situations and are designed to function harsh environments. The firm's main product line includes radiation survey meters, detectors, and monitoring systems but other product lines offered include organic scintillators, photomultiplier tubes, high performance alpha-beta sample counting systems, instruments for air monitoring, plastic injection molding, and specialty technical glass. Subsiduaries of the firminclude Ludlum Medical Physics, ET Enterprises Limited, and Electron Tubes Ltd
