Abstract: An improved electrode assembly for measuring ions, such as a pH electrode, and method of forming the same is provided. A plastic support layer with an aperture is mounted over a base member having electrodes. A gelatinized internal solution is mounted in the aperture over the electrodes in a plasticized solution containing a hydrogen ion-responsive material is formed into a paste and is positioned over the gelatinized internal solution and the adjacent surrounding areas of the support layer. When the paste solidifies it forms a thin film plastic ion-selective response membrane that is integrally sealed to the support layer.

Abstract: Method of producing a ferroelectric thin film by chemical vapor deposition, by providing a gaseous mixture containing oxygen and a gaseous raw material containing (A) alkyl lead and or alkyl bismuth together with an alcoholate of titanium, zirconium, silicon, germanium or niobium, (B) alkyl lead and alkyl germanium, or (C) alkyl bismuth and alkyl lead, and reacting the oxygen and gaseous raw material to oxidize the components of (A), (B) or (C), to form the thin film on the substrate.

Abstract: An infrared radiation gas analyzer for determining the concentration of an ingredient in a sample gas has a sample gas container for containing a sample gas at a temperature at which the ingredient the concentration of which is to be determined will emit infrared radiation in the range characteristic of the ingredient and a window for allowing the infrared radiation to escape from the container. An optical chopper outside said container interrupts the radiation escaping from the container. A pair of filters is positioned in the path of the radiation escaping from the container and spaced transversely of the path, one of the filters transmitting only radiation in the range and the other of the filters transmitting only radiation in a range near to the first mentioned range.

Abstract: A thermopile type detector which is constituted by an electrically insulating film, a thermopile supported on the film, a semiconductor substrate supporting the film, and a temperature sensing element on the surface of the substrate on which the film is supported and in the neighborhood of a cold junction of the thermopile. The temperature on the substrate immediately adjacent a cold junction of the thermopile can be measured for use in compensating the output of the thermopile for the changes in temperature of the cold junction. The temperature sensing element can be a semiconductor material such as a diode or a transistor forming a semiconductor with the substrate.

Abstract: A compound infrared detector, having a thermopile detector which is constructed on one face of a pyroelectric insulating thin film and a pyroelectric detector which is constructed by installing electrodes on both faces of the insulating thin film in opposite relationship to an infrared ray responsive portion thereof.The compound infrared detector of the present invention can function both as a pyroelectric detector and as a thermopile detector. In addition, the pyroelectric detector and the thermopile detector can be installed on the identical focus of the identical optical system because they have a common infrared ray responsive portion and as a result thereof, the number of detectors and also the number of optical adjusting means and optical parts can be reduced relative to those used in the prior case when two detectors are used; that is, the mutual compensation effect of both kinds of detectors can be inexpensively attained.