A pressure activated valve for a three-way connection between a catheter, an injector and a pressure transducer is disclosed. A peripheral wall portion of the recess is formed having disc supporting portions that support a disc in a manner such that the recording surface of the disc is floating. In a semiconductor integrated circuit device comprising a circuit block having a first MOS transistor, and a leakage current control circuit having a second MOS transistor and a current source, a source and drain circuit of the second MOS transistor is formed between the power supply line of the circuit block and a voltage point where operating voltage is supplied. A pattern of events is detected in the bookkeeping information. The electromagnetic coupling device converts and transmits the electrical energy from the system side to the output side and thereby provides the working energy to the output control circuit connected to the first output-side electromagnetic coupling element. By sequentially applying different addresses to the decoders, the resistance of the chains can be individually measured.