Abstract: Gas sensor. The sensor is a single crystalline SnO disk and circuitry for measuring electrical resistance of the disk is provided. A change in resistance in the disk indicates adsorption of a gas on the disk's surface. The sensor is particularly adapted for detecting NO2 with high sensitivity and selectivity.

Abstract: Gas sensor. The sensor is a single crystalline SnO disk and circuitry for measuring electrical resistance of the disk is provided. A change in resistance in the disk indicates adsorption of a gas on the disk's surface. The sensor is particularly adapted for detecting NO2 with high sensitivity and selectivity.

Abstract: A covering panel consisting of a metal cladding with a supporting structure (15) and cladding members (11) attached via fastening screw (14). The cladding members (11) consists of extruded aluminum sections and comprise quick fastening members (12) and locking members (13) for interconnecting the sections. The cladding members (11) are joined to the supporting structure (15) by evenly spaced longitudinal T-shaped sections (20) each having an axial longitudinal channel (21) with grooved walls for engagement with the screws (14) for fastening the cladding members. The sections are adjustably spaced from the wall (22) via brackets (23) engageable with the longitudinal sections (20).

Abstract: The panel comprises an outer plate (70) supported by a metal frame (71). Two opposite sides of the frame are formed by light metal profiled elements (72, 73) having a rim (74) which extends along one edge (75) of the outer surface of the plate. This rim may be bevelled or right-angled. The plate is clamped between the opposing rims (74) by means of two threaded steel rods (76). The other two edges of the panel are devoid of any metal element. The panel (62) may be placed on the front of a window (63) or an opaque part of the facade. This panel makes it possible to attach, without the use of glue, thin facade facing plates, particularly plates of glass or stone, so that they are virtually the only visible parts of the facade.