The thermal accelerometer appears as a real technological breakthrough compared to traditional pendulum accelerometers which are very poorly suited to the high-level shock measurement and their resistance to harsh environments. Indeed, thanks to their architecture, thermal accelerometers are resistant to accelerations up to 50 000g (1g=9,8m/s-2). Besides the ability to survive these extreme environments, the sensor must also allow the measurement of this high level of acceleration with high bandwidth as we have begun to demonstrate with the preliminary results of the initial project. The main purpose of this study is to use the principle of thermal accelerometer to measure strong shock levels with a bandwidth from DC to more than 10 KHz. The use of microtechnologies will significantly reduce footprint and volume but also achieve competitive manufacturing costs. This technology allows us to measure both high acceleration or gravity in continuous operation. This would envisage dual applications both in civilian and defense fields. Indeed in the latter case, there would be applications for the measurement of strong deceleration levels on impact of the specimen in concrete target and then trace the movements with the ability to measure continuous acceleration . In the second case, these devices could be used as shock or vibration sensors in areas such as transport, aerospace, civil engineering or oil exploration, ... At present, there are only very few sensors operating in this range of accelerations having good stability and accuracy. The technology that is used most often is "piezo-resistive" and is North American. They are subject to strong export constraints (ITAR). It is essential to have a European technology or French in order to overcome a US dependency. It is by the way strategic for the defense industry. That is why the development of such a MEMS sensor (Micro Electro Mechanical System) based on the heat transfer would in itself a major innovation in this area.