A chop stick assembly includes a first section having an open top end and an open lower end into which a second section is retractable inserted. The different frequency such as harmonic frequency of the MR coil is applied to the coil and the reflected power is measured by the power sensor. The actuator is a device having therein a plurality of hydraulic cylinders to be operated in a dual-stroke manner. The invention may particularly be used in all electrochemical sensor applications where detection is performed in small volumes. By handing over the ciphering parameter from the protocol processing portion to the other protocol processing portion, a telephone call is continued and a user equipment 41 is not conscious of handover of processing.