A CPP type magnetic sensing element capable of properly performing magnetization control of a free magnetic layer and having small hysteresis and an excellent playback characteristic, as well as a manufacturing method therefor, are provided. A series of filters and conditioning units are used to separate and extract various substances from the exhaust gas, typically originating from an industrial process. While undergoing surgery, the patient is anesthetized with a sedative and a paralytic. The power conversion circuit is located inside the housing and has one end connected to the first cord and the other end to the second cord for conversing AC power from the external power source into DC power for the portable computer. Control of position is effected using resistance of the SMA actuator as a measure of position.