An insulated structure for an appliance includes a plurality of walls, a cavity defined by the plurality of walls, and an aperture defined by one of the plurality of walls. The aperture is employed in evacuating the cavity to establish a less-than-atmospheric pressure within the cavity. A base structure is coupled to an interior surface of the one of the plurality of walls that defines the aperture. The base structure is aligned with the aperture. A pressure sensor is received by the base structure. The base structure and the pressure sensor together define a pressure-sensing assembly.

A fixing device for a pressure sensor arranged on a flexible tubing includes a housing and a fixing member. The fixing member is used to fix a sensor body. The fixing member is provided with a first cavity to accommodate the sensor body. The sensor is arranged in the first cavity. A protrusion is provided on the periphery of the first cavity. A second cavity is provided inside the housing at a position corresponding to the protrusion. The protrusion extends into the second cavity and is not connected with the second cavity. The housing and the fixing member do not contact each other. When the flexible tubing deforms or a relative displacement occurs between the flexible tubing and the fixing device, the connection between the pressure sensor and the flexible tubing maintains good sealing, which greatly reduces the risk of leakage at the connection between the pressure sensor and the flexible tubing.

A seal for a depth gauge having an axis of revolution, the seal including a radially inner flank and a radially outer flank, wherein the radially inner flank has a height (h1) greater than a height (h2) of the radially outer flank. Also, a depth gauge with the seal.

A pressure sensing apparatus comprises an elongate first sensor device in a beam configuration supported at at least one longitudinal end by a rigid support structure and having a deflectable portion. A chamber is disposed adjacent a first, internally-facing, face of the first sensor device. An envelope hermetically seals the first sensor device and the chamber from an ambient environment external to the pressure sensing apparatus. The envelope comprises a flexible membrane disposed over and coupled to a second, externally-facing, face of the first sensor device and extending along at least one or two sides of the first sensor device and the chamber. The sensor device may be a surface acoustic wave device coupled to an RF antenna.