| 摘要 |
<p>PURPOSE:To provide a contact type thermistor having high resistance to heat and high-speed response by constructing it of a plate-shaped metal support having a recess in the central part and of a temperature detector disposed in the recession. CONSTITUTION:A recess 61 is provided in the central part of a plate-shaped metal support 6 and a temperature detector 7 is disposed in this recess 61. A stainless steel plate is used for the support 6. The detector 7 is constructed by disposing a thin film thermistor element 71 on an alumina support 72 and then by covering the periphery of the element with glass 73. The element 71 is constructed by forming an electrode film and a temperature-sensitive resistor film on the surface of an alumina substrate and lead wires 74 and 74' are led out of the electrode film. No organic substance such as resin is used in this constitution and, therefore, resistance to heat of 200 deg. or above is obtained. When a thermistor 6 thus constructed is brought into contact with an object, a heat flow occurs in a concentrated manner through the recess 61 of a small area and, therefore, heat response is high. The heat response of still higher speed is obtained by disposing a heat sinker between the inner surface of the recess 61 and the outer surface of the support 72.</p> |
