A pressure switch is equipped with a pressure sensor, a housing that houses the pressure sensor, an annular seal member arranged in a hole of the housing and which is interposed between the pressure sensor and the housing, and a pressing member that is fixed to the housing. The pressing member includes a base section that faces the seal member, and engagement arms that extend from the base section, are elastically deformable, and engage with the housing.

A pressure switch is equipped with a pressure sensor, a housing that houses the pressure sensor, an annular seal member arranged in a hole of the housing and which is interposed between the pressure sensor and the housing, and a pressing member that is fixed to the housing. The pressing member includes a base section that faces the seal member, and engagement arms that extend from the base section, are elastically deformable, and engage with the housing.

A pressure activated release system and method are disclosed for deployment of surface, aerial and subsea payloads. The system and method include a payload release switch that is activated, without human intervention, by a pressure differential. The system and method also includes a payload release mechanism having an unreleased configuration at pressures below a specified pressure. The release mechanism has a released configuration at pressures above the specified pressure. The switch causes the release mechanism to move from the unreleased configuration to the released configuration.

A contactor device includes: a first body substrate; a second body substrate; a flexible membrane connected to the first body substrate and second body substrate, wherein the second substrate body is movable relative to the first substrate body by flexure of the flexible membrane; an electrical contact member carried by the second substrate body; a microfluidic-channeled substrate coupled to the first body substrate, the microfluidic-channeled substrate having a chamber and a microfluidic channel in fluid communication with the chamber; and a 3-dimensional flexible membrane enclosing the chamber, wherein the 3-dimensional flexible membrane flexes toward the second body substrate when a fluid pressure is applied to the chamber through the microfluidic channel whereby a force or a movement is transferred to the second body substrate by the 3-dimensional flexible membrane.

A multi-mode air compressor pressure switch is disclosed. A first mode of operation of the switch has a first range that includes a first cut-out pressure and a first cut-in pressure. A second mode of operation of the switch has a second range that includes a second cut-out pressure and a second cut-in pressure. The second range is smaller than the first range. The second mode of operation adds compressor output over the first mode of operation to extend operable time of a tool that is connected to a compressor that is controlled by the first mode and the second mode.

A multi-mode air compressor pressure switch is disclosed. A first mode of operation of the switch has a first range that includes a first cut-out pressure and a first cut-in pressure. A second mode of operation of the switch has a second range that includes a second cut-out pressure and a second cut-in pressure. The second range is smaller than the first range. The second mode of operation adds compressor output over the first mode of operation to extend operable time of a tool that is connected to a compressor that is controlled by the first mode and the second mode.

Apparatuses are provided to facilitate sensing fluid within a fluid system, such as a coolant-based cooling apparatus for removing heat generated by one or more electronic components. The apparatus includes a plug configured to couple to a wall of the fluid system at an opening in the wall and to form a fluid-tight seal about the opening. The plug includes a fluid a fluid-sensor-receiving space configured to receive a fluid sensor, and when the plug is coupled to the wall at the opening, to position the fluid sensor at the opening in a manner to facilitate sensing of fluid within the system. The fluid sensor is removable from the plug without requiring uncoupling of the plug from the wall. In one implementation, the fluid sensor is a proximity sensor, and the plug is fabricated of a non-conductive material, and the wall a conductive material.

Embodiments of the disclosure provide an encapsulated compressor overload, an encapsulated compressor relay start, an encapsulated head pressure control switch and a wiring diagram for a circuit for air conditioning units which prevent gases from being ignited by means of encapsulating sparking components, use of solid-state switching devices, and/or wiring circuits in such a way that open contacts do not contain enough energy to produce a spark capable of igniting the atmosphere.

Embodiments of the disclosure provide an encapsulated compressor overload, an encapsulated compressor relay start, an encapsulated head pressure control switch and a wiring diagram for a circuit for air conditioning units which prevent gases from being ignited by means of encapsulating sparking components, use of solid-state switching devices, and/or wiring circuits in such a way that open contacts do not contain enough energy to produce a spark capable of igniting the atmosphere.

The present application provides a self-diagnostic gas density relay and a use method thereof, the gas density relay includes a gas density relay body, a gas density detection sensor, at least one diagnostic sensor, and an intelligent control unit; where the diagnostic sensor is configured to acquire deformation quantities of components that generate deformations, and/or positions or displacement quantities of components that generate displacements when the pressure changes, or the temperature changes, or the gas density changes in the gas density relay body; and the intelligent control unit is respectively connected with the gas density detection sensor and the diagnostic sensor, receives data acquired by the gas density detection sensor and/or the diagnostic sensor, and diagnoses a current working state of the gas density relay body. The present application is used for monitoring a gas density of the gas-insulated or arc-extinguished electrical equipment, and at the same time, on-line self-inspection for the gas density relay is completed, so that efficiency is increased, no maintenance is realized, operation and maintenance costs are greatly reduced, and safe operation of a power grid is guaranteed.