Name a common device used for measuring radiation dose.

The correct choice is a dosimeter, which is specifically designed to measure radiation dose. Dosimeters can quantify the amount of ionizing radiation exposure to which a person or an object has been subjected. They contain materials that either change properties in response to radiation exposure or can detect ionizing radiation's effects, making them essential tools for ensuring safety in environments where radiation is present.

In contrast, a thermometer is used for measuring temperature and has no application in radiation measurement. A radiometer measures the intensity of radiation but does not quantify the dose absorbed by a material or a person. A manometer measures the pressure of gases or liquids and is unrelated to radiation exposure. Thus, the dosimeter is uniquely suited for measuring radiation dose, making it the correct answer in this context.