I have two questions I would like to ask, if someone can answer them please from their experience or knowledge

1) I would like to know, in hydraulic systems is there any relation between pressure and weight. If I have a pressure sensor which can tell me pressure in BAR and give me 1 to 5 V output for 0-350BAR can I relate it to the weight? If yes, what is the formula or method in doing so?

2) I have seen many sensors advising the output voltage between certain values, lets say 0.5 - 4.5v or 1 to 5v etc. I came across one sensor which tells pressure but the output is stated as 0.5-4.5v regulated. I would like to ask what does this word 'regulated' signifies. Does it simply means 0.5-4.5v volt output based on 0-350 bar pressure or there is something else to it?