Disclosed is a sensor module for a card connector, the connector having an inlet end through which the card is inserted, and a terminating end opposing the inlet end, characterized in that: the sensor module is provided at the terminating end and activated by a leading edge of the card from a normally non-actuated position to an actuated position. The liquid of low volatility is removed by contacting the fluid stream of concern with one side of a semi-permeable membrane. Each of the sector regions is divided into a plurality of large blocks, such as eight large blocks. Power is always supplied to the standby controlling circuit.