What is a pyrometer used to measure?

A pyrometer is specifically designed to measure high temperatures, particularly in exhaust systems or other similar areas where precise temperature readings are crucial. In the context of marine applications, such as in engines and their exhaust systems, the pyrometer is essential for monitoring exhaust temperatures to ensure optimal engine performance and to prevent overheating, which can lead to machinery damage or inefficiency.

This monitoring is vital because excessive exhaust temperatures can indicate a rich fuel mixture or other issues that may affect engine operation, thus impacting overall safety and performance. Other devices are typically used to measure pressure levels, viscosity of oil, or fuel flow rates, which do not fall within the pyrometer's capabilities. Therefore, selecting the reference to exhaust temperature aligns perfectly with the principal function of a pyrometer.