Vutlan offers contactless, precise open-loop AC-current and DC-current sensors. They measure AC and DC currents and provide electrical isolation between the circuit being measured and the output of the sensor (the primary current is measured without electrical contact with the primary circuit, providing galvanic isolation).
This provides a solution for measuring how much AC or DC current is flowing through a wire without any physical intervention.
Vutlan transducers and sensors provide analog output signals (0 - 5 V) compatible with most PLCs, data loggers and SCADA systems.

Click here for complete description of AC/DC Current Monitoring: