With an increase in the devices efficiency, the number of parameters that need to be controlled increases, control systems are becoming more and more complicated and much smarter, which also leads to an increase in the number of controlled parameters. Various sensors are required to ensure the control, including the high-temperature sensors on the direct piezoelectric effect. They are used in aicraft turbine control systems, vehicle internal combustion engines, gas generators, vibration monitoring systems, and in other fields of application where the measurement of physical quantities at high temperatures (above 500 ° C) is required. Fomos-Materials produces sensitive elements of piezoelectric crystals capable to operate at temperatures up to 900°С.