Which of the following are main components of a radiation detection device?

A radiation detection device fundamentally consists of several key components that work together to accurately sense and process radiation levels. The sensor is crucial as it is responsible for detecting ionizing radiation, whether it be alpha, beta, gamma, or neutron particles. The readout or display allows users to visualize the measurement data in a clear format, ensuring that the information is easily interpretable.

Additionally, the power source is essential for the device's operation, as it provides the necessary energy for the sensor and readout/display to function properly. Some devices incorporate a data logger, which is useful for recording measurements over time, allowing for comprehensive analysis and documentation of radiation levels for further review.

This composition of main components ensures that the device can effectively perform its intended function of detecting, measuring, and displaying the presence of radiation, making choice B the most appropriate answer in the context of key components for radiation detection devices.