Amp Meter vs. CT Meter

The Amp Meter is a general purpose current meter designed to measure AC & DC currents directly. 

The CT Meter is designed to measure AC currents using an external CT and offers improved accuracy over the Amp meter. 

Amp Meter CT Meter
Measures AC & DC currents directly up to 5A on circuits carrying less than 42V AC/DC AC currents with external CT
Use with CT? Yes (up to 10,000A), but not recommended Yes
Use with current shunt? No - use the Shunt meter  No - use the Shunt meter 
Accuracy 1%  0.5%  
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