What designation is used for a transducer that converts current to voltage?

The designation used for a transducer that converts current to voltage is typically referred to as "I/E," which denotes the conversion from an input current (I) to an output voltage (E).

In process control systems, transducers play a crucial role in bridging the gap between different types of signals. When a transducer is specified as I/E, it implies that it takes a current signal as an input and converts it into a corresponding voltage output. This process is essential for systems that require voltage signals to interface with control devices, such as controllers or indicators, which may not be compatible with current inputs.

The other options, like E/I (voltage to current), I/P (current to pressure), and P/I (pressure to current), serve different purposes in signal conversion or transducer applications, and thus do not apply to the specified function of converting current to voltage. Understanding these designations helps in selecting the correct transducer for a specific application in control systems.