A sensor needs to be modified to work off a 24V DC supply and provide a
4-20mA output.

How is this normally done?

Is it okay if the 4-20mA output has a common connection with the power
supply or should it be totally isolated. What is normally expected by
typical control equipment?

Someone must do this regularly.

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Brian Gregory. (In the UK)

To email me remove the letter vee.