An integrator is designed to measure which of the following parameters?

An integrator is typically a device used in various systems to measure specific parameters related to process conditions, especially in the context of sterilization or environmental monitoring. The correct answer highlights the importance of temperature, time, and presence of steam, which are crucial parameters in the sterilization process.

Temperature is a key factor in ensuring that the necessary conditions for effective sterilization are met. The combination of temperature and time ensures that all microorganisms are eradicated. The presence of steam is particularly important when considering methods like autoclaving, where steam is the medium used for sterilization. Monitoring these three parameters ensures that the sterilization cycle has been effective and that the items being sterilized have been subjected to the appropriate conditions for the required duration.

In contrast, the other options include combinations of parameters that may be important in other contexts (like environmental monitoring), but they do not directly pertain to the primary function of an integrator in the context of sterilization or similar processes. For instance, while humidity and pressure are relevant in some settings, they do not encompass the essential thermal aspects of effective sterilization processes as directly as the temperature, time, and presence of steam do.