Piezoelectric pressure sensors are susceptible to changing temperatures, because resulting mechanical deformations of the sensor membrane and housing may exert a positive or negative force on the piezo crystal, thus changing the reading of this sensor. The consideration and compensation of this influence quantity is a frequent topic of many investigations in the field of combustion chambers, of spark-ignition engines and internal combustion engines. However, this is not the case in the field of the type of protection “flameproof enclosures”. Here a peculiarity is the fast temperature rise during a single explosion and the concurrent influence of the temperature gradient, which is often described as thermal shock. The whole event has a typical duration time of the order of seconds and less. Thermal shocks have so far received little attention, as was also a lesson learnt from the evaluation of an interlaboratory comparison between Ex testing laboratories. The laboratories handle thermal shock in a variety of ways, starting from complete ignorance up to various sophisticated coatings. This was a main source of different results within the field of participants. This work evaluates the behavior of different piezoelectric pressure sensor types with respect to thermal shock. Different temperature protection measures are investigated regarding their functionality, practicability and stability. Possible influences on the sensitivity of the sensors due to the used protective measures regarding thermal shock are shown. The transient temperature load of the sensor membrane is estimated by physical calculations as well as numerical analysis based on surface temperature measurements transformed in a surface heat flux density. This work provides guidelines for typical end-users in the field of flameproof enclosures how to handle thermal shock correctly.

压电压力传感器容易受到温度变化的影响，因为传感器膜和外壳的机械变形可能会在压电晶体上施加正或负力，从而改变该传感器的读数。这种影响量的考虑和补偿是燃烧室，火花点火发动机和内燃机领域中许多研究的经常主题。但是，在“隔爆外壳”保护类型中并非如此。这里的特质是一次爆炸过程中的快速温度上升以及温度梯度的同时影响，这通常被称为热冲击。整个事件的典型持续时间为几秒或更短。到目前为止，热冲击很少引起注意，从评估Ex检验实验室之间的实验室间比较中也吸取了教训。从完全不了解到各种复杂的涂层，实验室可以通过多种方式处理热冲击。这是参与者领域内不同结果的主要来源。这项工作评估了不同类型的压电压力传感器在热冲击方面的行为。研究了不同的温度保护措施的功能，实用性和稳定性。显示了由于使用的有关热冲击的保护措施而可能对传感器的灵敏度产生的影响。传感器膜的瞬态温度负荷通过物理计算以及基于表面温度测量值（转换为表面热通量密度）的数值分析来估算。这项工作为隔爆外壳领域中的典型最终用户提供了如何正确处理热冲击的指南。