| 摘要 |
Extending from a handle grip is an elongated hollow metal tube with an outer open end. The interior cavity of the tube contains a quantity of foamed plastic, the outer end of which is generally conically shaped and extends beyond the open tube end. A thermistor is located at the tip of the foamed plastic cone and a thin coating of rigid cementitious material is provided over the exposed end of the plastic, metal tube and side portions of the thermistor to secure the thermistor into a fixed position. A removable plastic envelope or sheath is received over the tube and exposed thermistor, with the thermistor bottoming against the inner tube end wall.
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