Abstract
Pressure transducers in highly loaded internal combustion engines are loaded to and often over their load limits. The external interference is manifold and extremely high. This contribution concentrates on two effects happening in the combustion chamber which are often not considered when choosing pressure transducers but influencing their behaviour strongly. On the one hand the deformation of the mounting bore due to the deformation of the cylinder head causes stress to the sensor and so creates error signals. On the other hand transient operation often is a task of development investigations and therefore "Load Change" is a typical claim to the engine. "Load Change Drift" is the transducers reaction. But because of different pressure transducers behave in different ways the right choice of the sensor is important to receive correct measuring results. Different recommendations are given.