Regulator Nitro, no not a which one type question

[poiuyt]

Im new to nitro and stuff so dont laugh, but why do people put a guage on their regulators when there is already a guage on the nitro tank?? Are these two guages different or something??

[Omega6_Virus]

the regulator basicly controls how much air pressure gets into the gun. The one on the tank shows how much you have left. If you run a low pressure gun you want to make sure you have the pressure going into the gun from out of the regulator to be low like under 250psi. If its too high u could mess up the gun.
You dont need a gauge on the regulator unless u have an adjustable tank. But no one would buy an adjustable tank if they owned a regulator.