A hydraulic sensor attachment structure includes an accommodating portion, a sensor case, and a lid disposed over the accommodating portion. In the hydraulic sensor attachment structure, an oil passage body includes the accommodating portion and a hydraulic pressure detection port. A hydraulic sensor includes a sensor main body, and the sensor case that covers the sensor main body. The accommodating portion includes a support portion that supports the hydraulic sensor from below. The sensor case includes a detection port portion. The accommodating portion includes a fastening portion and the lid includes a fastening portion. By fastening the fastening portion of the accommodating portion and the fastening portion of the lid by rotating the lid in one direction of the circumferential directions, the sensor case is held by the support portion and the lid in the up-down direction and is fixed to the oil passage body.

A transducer assembly including a rigid transducer housing. The transducer housing has an interior space and defines a transducer socket and a pressure balancing cylinder. A transducer device is fixedly mounted within the transducer socket. A pressure balancing piston is reciprocably mounted within the pressure balancing cylinder. A pressure balancing fluid and an electronics assembly are contained within the interior space. The electronics assembly is operatively connected with the transducer device. A measurement tool including a tool body and one or more transducer assemblies. The tool body defines one or more pressure balancing body passages extending between mounting pockets in the tool body. The transducer housings define one or more pressure balancing housing passages extending between the interior space and the exterior of the transducer housings. At least some pressure balancing body passages and some pressure balancing housing passages are in pressure communication with each other.

An adapter for a diaphragm seal, having a first coupling area for fluid-tight coupling with a process port, a second coupling area for fluid-tight coupling with a diaphragm seal and an adapter diaphragm, which is disposed fluid-tight at a junction between the first coupling area and the second coupling area and is designed to come into contact with a seal diaphragm in a mounted state of the diaphragm seal. A measuring system is also provided for measuring a pressure, a fill level and/or a temperature of a process medium within an apparatus, and an apparatus of this type.

A pressure sensor includes a sensor member including a sensor face to which pressure is imparted and a cover member that covers at least part of the peripheral face of the sensor member while exposing the sensor face out of one end side. With such a configuration, the sensor member can be protected from a lateral force (side pressure), whereby the sensor member can be prevented from being broken by the application of the side pressure to the sensor member.

Improvements in thin film sensors are disclosed. These can be used for aircraft applications. Dielectric isolation washers can be provided between a pressure sensor and an exterior metal housing of a sensor assembly. In this manner, high voltage inputs from a lightning strike or other source that reach the sensor housing are not transmitted to the sensor. Dielectric washers, insulators, and potting compounds can thus isolate a metal thin film pressure sensor from adjacent metal components (e.g., using non-conducting insulating materials like Torlon, zirconia and nylon). Besides their high dielectric strength, these materials exhibit compressive strength and resistance to wear, creep and corrosion. Desirable thicknesses for these components are provided. The described thin film pressure sensor embodiments can attain a dielectric rating of 1500 VAC.

In an oil-pressure-sensor attachment structure according to an aspect of the invention, an oil channel body includes a lower body and an upper body arranged at an upper side of the lower body in a superposed manner. The attachment structure includes the upper body, a sensor case, and a connection member including an electrical connection portion that electrically connects an external power supply with a sensor main body. The connection member contacts the upper body from the upper side. The upper body has a through hole in an up-down direction. The sensor case includes a columnar portion that extends in the up-down direction and is inserted into the through hole, a flange portion that protrudes outward in the radial direction from the columnar portion and is arranged to face the lower side of the upper body, and a first hook portion that is hooked to the connection member.

A connector includes a resin-made connector body and a pressure sensor. The connector body includes a first main tubular part that is connected to a first pipe, a second main tubular part that is connected to a second pipe, and a sensor mounting part. The first main tubular part and the second main tubular part connect with each other to form an angle. The sensor mounting part includes: a tubular intake part that is formed in line with a line extending from one of the first main tubular part and the second main tubular part and has a bottom face; and a sensor mounting seat that is capable of being mounted with the pressure sensor and communicates with a peripheral-surface opening of the tubular intake part.

A pressure sensor includes a sensor chip that detects a pressure of a pressure medium; and a case that accommodates the sensor chip and has an inlet port connected with the outside, the case having a pressure inlet portion surrounding the inlet port. The pressure inlet portion is configured from: a front wall placed forward of the case with a clearance; a top wall and a pair of side walls, each which is connected to the front wall; and an opening introducing the pressure medium into the inlet port from a lower position with respect to the inlet port. The top wall is connected to the side walls and angled in entirety toward an upper position with respect to the inlet port. The front wall has an opening end configuring the opening, the opening end being recessed toward the top wall in an arc shape.

A drying module for a relative pressure measuring transducer, which has in the interior of a housing of the measuring transducer a reference pressure supply leading from a relative pressure sensor to an opening in a housing wall of the housing, and which has a connection element, whose inner space is connected via the opening with the reference pressure supply extending in the measuring transducer. The drying module comprises a module housing, which has an inner space, in which a drying means is located, and, extending through the module housing (23), a reference pressure supply, whose first end is contactable with the reference pressure via an opening of the module housing, whose second end is connectable to the reference pressure supply of the measuring transducer via a connection element of the drying module connectable with the connection element of the measuring transducer, and whose inner space in the module housing is in humidity permeable connection with the inner space containing the drying means.

A physical quantity measuring device includes: a sensor module provided with a diaphragm; a joint to which the sensor module is attached, the joint including a pressure inlet for delivering fluid to be measured to the sensor module. The joint is made of a synthetic resin and includes a joint body and an elastically deformable claw provided to the joint body and configured to lock the sensor module. Since the claw keeps the sensor module to be held by virtue of the elastic force of the claw, a further attachment process such as welding for attaching the sensor module to the joint is unnecessary. Since the joint body and the claw are integrally made of synthetic resin, it is not necessary to separately manufacture the joint body and the claw.