Sensors and telecommunications networks   In Brief   The CEA's environmental assessment and monitoring Department (Département analyse, surveillance, environnement, DASE) has designed and developed sophisticated and often unique devices and techniques adapted to the phenomena or elements to be detected and measured (seismic events, infrasounds, radionuclides). This scientific and technical expertise is in high demand and widely recognized, particularly in view of the development of the International Monitoring System (IMS) being set up by the Comprehensive Test-Ban Treaty (CTBT). Read next   Contents   Research and development activities Environmental monitoring International treaty monitoring Seismic stations Hydroacoustic stations Infrasound stations Detection of radionuclides in the atmosphere Products and services Seismometers Microbarometers