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It depends on what kind of reading you want.

An electrician will usually carry around a multimeter which can measure voltage, current, and resistance.

Another piece of equipment that can "determine the presence of electric charge" would be a Electromagnetic Field (EMF) detector, since all electrical appliances/wires produce an electromagnetic field.

There could be others, but those are the two I'm aware of.

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Lydia Schulist

Lvl 13
2y ago

What else can I help you with?