What signal type allows for a continuous range of values in process measurements?

The correct choice is analog signals, as they are specifically designed to represent a continuous range of values in process measurements. Analog signals can vary smoothly over time, allowing them to provide detailed information about changes in physical quantities such as temperature, pressure, flow, and level. This continuous nature makes analog signals highly suitable for applications where precise measurements are necessary.

In contrast, discrete signals represent distinct, separate values and can only take on specific values, often used in digital applications. Binary signals are a type of discrete signal that specifically utilize two states, commonly represented as 0s and 1s. Pulsed signals, which can also represent discrete information, vary between defined high and low states at specific intervals but do not convey the continuous variations seen with analog signals. Thus, analog signals are the preferred choice when continuous and precise measurement is required in control systems.