When using a shunt current sensor and feeding the differential amplifier output to the Arduino, is it required to put some kind of "isolation" mechanism?

Direct (Shunt) Current Sensing

system March 30, 2014, 10:27pm 3

LarryD:
Are you using something like this?
INA219 High Side DC Current Sensor Breakout - 26V ±3.2A Max [STEMMA QT] : ID 904 : Adafruit Industries, Unique & fun DIY electronics and kits

Not exactly that, but quite similar:

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Direct (Shunt) Current Sensing

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