石英晶体是一种常见的电子元器件，广泛应用于计算机、通信、测量等领域。石英晶体的质量对于电子设备的性能和稳定性至关重要。IEC 60122-4:2019标准是关于石英晶体的质量评估的标准之一，具体涉及到带有温度传感器的石英晶体单元。

该标准规定了石英晶体单元的质量评估方法和测试程序，以确保其符合国际标准的要求。其中包括石英晶体单元的外观检查、电气性能测试、温度特性测试等。此外，该标准还规定了石英晶体单元的标记和包装要求。

在实际应用中，石英晶体单元的温度特性对于电子设备的性能和稳定性也非常重要。因此，IEC 60122-4:2019标准要求石英晶体单元必须带有温度传感器，以便进行温度特性测试。温度传感器的类型和参数也在标准中进行了规定。

IEC 60122-4:2019标准的实施可以提高石英晶体单元的质量和可靠性，有助于保证电子设备的性能和稳定性。同时，该标准的实施也有助于促进石英晶体单元的标准化和国际贸易。

相关标准
- IEC 60758:2018 Quartz crystal controlled oscillators of assessed quality - Part 1: Generic specification
- IEC 60444-1:2018 Quartz crystal units - A specification in the IEC quality assessment system for electronic components (IECQ) - Part 1: Blank detail specification - Quartz crystal units
- IEC 60444-2:2018 Quartz crystal units - A specification in the IEC quality assessment system for electronic components (IECQ) - Part 2: Sectional specification - Quartz crystal units for frequency control and selection
- IEC 60444-3:2018 Quartz crystal units - A specification in the IEC quality assessment system for electronic components (IECQ) - Part 3: Sectional specification - Quartz crystal units for frequency control and selection - Standard outlines and lead connections
- IEC 60444-4:2018 Quartz crystal units - A specification in the IEC quality assessment system for electronic components (IECQ) - Part 4: Sectional specification - Quartz crystal units for frequency control and selection - Guide to the use of preferred frequencies and to the preparation of a specification