The 6045A piezoelectric pressure sensor from Kistler Instrument is designed around a PiezoStar crystal element that has a sensitivity of -45 pC/bar. This higher-level signal reduces data-compromising effects and eases signal conditioning. The crystal element output remains linear at elevated temperatures by resisting thermal influences, thus eliminating the need for water cooling. With low thermal shock in high-impedance charge-mode operation, the unit meets the demands of test track tuning. Both thermodynamic investigations and knock measurements can be made with an M8 X 0.75 access hole. The sensor mounting incorporates a shoulder seal design for efficient heat control. The device is compatible with common laboratory charge amplifiers. It can establish basic engine performance as well as help optimize engine efficiency parameters.