According to the present invention, a portable composite sensor apparatus for measuring multiple types of biometric information comprises: a plurality of electrodes for receiving biometric information; a plurality of biometric information measurement circuit units for measuring the biometric information received from the plurality of electrodes; a plurality of current sensors for always receiving power to sense current when a measurement target is in contact with the electrode; and a microcontroller for controlling power supply of a battery by operating as a sleep mode or an active mode based on whether the current is sensed by the current sensor and a wireless communication means transceiving data with a smartphone.
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