Accuracy of the voltmeter/ammeter in the E-series inputs

Hi,

I have a need to connect different sensors to the inputs in my UR5e (both digital and analog). Most of the sensors I use display the measurements with varying voltage/current values.

I was wondering what kind of voltage/current magnitude is required, for the robot to be able to measure it accurately? I tested an analog pressure sensor that displayed the measurement in mV, and I was able to read the measurements with the robot. The problem is that I do not know whether these readings were accurate, or mainly just noise.