Kistler produces piezoelectric and variable capacitive sensing technologies for various flight test requirements. For flight test simulator testing, its K-Beam microelectromechanical system (MEMS) variable capacitance accelerometers are mounted under the pilot seat to determine a simulator’s vibration power spectrum density, with the goal of precisely matching the actual vibration characteristics of the aircraft to be simulated. After simulator commissioning, the same transducers provide real-time data on the actual g-levels experienced by the pilot. If accelerometer data indicate that training limits are exceeded, the system shuts down automatically. The devices are offered in ranges from ±2 g to ±200 g, with frequency response from dc to 1000 Hz (5%), and are available in either single axis (Type 8315) or triaxial (Type 8395A) versions.