Abstract: A sensor module according to an embodiment of the present invention is connected to a connector module, which transfers water quality information to an electronic device such that the same is displayed on the electronic device, and thereby acquires water quality characteristics for calculating the information. The sensor module is separably connected to the connector module and can be connected to any connector module. The connector module comprises an electronic device communication portion for transferring the water quality information to the electronic device, a body-proximate communication portion capable of wirelessly communicating with the sensor module, and a wireless power transmitting portion for wirelessly supplying the sensor module with power.