| 摘要 |
PURPOSE:To make the positions of plural pieces of circular-columnar gas detecting elements difficult to deviate during their use by containing said elements into a notched cylindrical insulator of the shape wherein part of the circumferential wall is notched lingitudinally. CONSTITUTION:A circular cylindrical heater, that is, a coil-like heater 4 and two gas detecting elements 3, 3' are disposed in the upper part of a base body 1. Both elements 3, 3' are juxtaposed side by side longitudinally in the heater 4. Plural electrode pins 2 are provided to the top surface of the body 1 by projecting therefrom, and the electrode 4a of the heater 4 and the electrodes 3a, 3a' of the elements 3, 3' are connected to the top end parts thereof. These detecting elements are contained in an insulator of a notched cylindrical shape provided by fitting the same in the heater 4. |
