A thermistor having multiple metal layers about at least a portion of a semiconductor body. In one embodiment, a flange is formed integrally with each stub shaft and is welded to a sleeve inserted into a respective end of the tube and secured there either by a press fit andor welding. A regulating portion regulates the displacement of the movable member within a desired range, and by means of energy at the time of bubble creation, the liquid being discharged from the discharge port.