I'm doing a meteorological station with some sensors.
One of them is a pyranometer, a sensor that measures the global solar radiation, and here's the problem.
The pyranometer sensor output has a maximum of 10mV, has a coaxial cable, the shield is positive and the center condutor is negative, and has a resistor across the leads of the cable.
Is it right to connect one wire (positive) to analog (and other to ground) and measure the voltage in?
How can i measure values between 0mV and 10mV, if arduino has a 4.9mV "length unit"?
Is it necessary to amplify the signal?