A sealed cooling system includes a coolant tank having a liquid space configured to hold liquid coolant, and a gas space configured to hold gas. A temperature sensor detects the temperature of the liquid coolant. A pressure sensor detects the pressure in the coolant tank. A processor compares the pressure in the coolant tank to predicted pressure in the coolant tank as a function of liquid coolant temperature. The processor determines and outputs a signal indicative of a leak in the sealed cooling system if the pressure in the coolant tank deviates from the predicted pressure in the coolant tank according to predetermined criteria.

It is an object of the present invention to enhance reliability of an allowable limit conductance used for setting a threshold value for evaluating sealability of a test object, and further, enhance reliability of the sealability evaluation. By leak testing a test object 9A with a sealing defect 9g, a leakage characteristic that shows a relationship between an internal-external pressure difference and a leak flow rate is obtained. A conductance of a test object with a similar artificial leak 9B having a similar artificial leak device 29 disposed therein, conducting the leak-detected substance is measured. The similar artificial leak device 29 has a leakage characteristic similar to the obtained leakage characteristic. An allowable limit conductance is obtained based on results of the measurement. Sealability of a test object 9 is evaluated based on a threshold value set with a standard artificial leak device 9S having the allowable limit conductance.

A method for leak testing includes a leak testing step and a reference leak step. In the leak testing step, a hollow work 20 as a test object is encapsulated in a work capsule 11. A test pressure is supplied to the work capsule 11 through a path 2a connected to the work capsule. A variation of pressure inside the work capsule 11 is detected in a condition in which the path 2a is shut-off, and a judgment is made whether a leakage through the work is generated based on the detected output. In the reference leak step, a reference leak device 30 having a known pinhole 31a is mounted on a work 20′ for reference leakage that is same as the work 20 as the test object. The work 20′ for reference leakage is encapsulated in the work capsule 11. The test pressure is supplied to the work capsule 11 via the path 2a, and a reference leakage is generated in the work 20′ for reference leakage via the reference leak device 30 in a condition in which the path 2a is shut-off. A variation of pressure inside the work capsule 11 accompanying the reference leakage is detected.

There is described a testing apparatus (20) for testing the integrity of a tank (12). The apparatus comprises a control tube (22) configured to be at least partially submerged within the tank (12). The control tube (22) being controlled to open and close to permit the ingress and capture of fuel into the control tube (22) from the tank (12). A first gas tube (29) is connectable to a remote gas source (40) and is configured to deliver gas to an outer surface of the control tube (22) at a predetermined location. A second gas tube (29) is connectable to the remote gas source (40) and configured to deliver gas to an inner surface of the control tube (22) at a predetermined location. A metering unit (30) is in fluid communication with the first gas tube (29) and the second gas tube (29) and having one or more pressure sensors (32) for measuring fuel mass inside the control tube (22) and fuel mass outside the control tube (22) and for comparing the two measurements to determine a change in fuel mass outside the control tube (22). The change in fuel mass outside the control tube (22) being indicative of a loss of integrity of the tank (12).

A gas leak sensing device includes a constant flow rate control valve, a pressurization control valve, a supply-side gas circuit, a master-side gas circuit, a workpiece-side gas circuit, an equal pressure valve, an exhaust valve, a test pressure sensor, and a differential pressure sensor. The supply-side gas circuit is connected with the constant flow rate control valve and the pressurization control valve. The equal pressure valve performs opening and closing between the supply-side gas circuit and the master-side gas circuit and opening and closing between the supply-side gas circuit and the workpiece-side gas circuit. The exhaust valve performs opening and closing between the workpiece-side gas circuit and outside. The test pressure sensor detects pressure in the supply-side gas circuit. The differential pressure sensor detects a differential pressure between the master-side gas circuit and the workpiece-side gas circuit.

Systems and methods are provided for a leak sensor drip tray. In some embodiments, an Information Handling System (IHS) may include: a component; a cold plate disposed above the component; a leak sensor board disposed above the cold plate; and a drip tray disposed above the leak sensor, wherein the drip tray is configured to capture a fluid leak from a fitting coupled to the cold plate.

An endoscope includes a first subassembly, a second subassembly, a third subassembly, and a fourth subassembly, which are sequentially assembled and tested in making the endoscope. The first subassembly includes a pressure-sealed electrical cable connected to an image capture unit. The second subassembly includes the first subassembly, a shell, a light pipe, and a lid. The third subassembly includes the second subassembly, a central tube, and a flange. The fourth subassembly includes the third subassembly, a base, a shaft, and optionally an articulating assembly.

A plate fin fluid processing device includes active layers, where each active layer includes a fin plate sandwiched between parting sheets so that an active fluid space is defined between the parting sheets. The active layers include an outermost active layer having an inlet and an outlet. A contingent layer body is positioned adjacent to the outermost active layer and includes a fin plate positioned between a parting sheet and a cap sheet. The contingent layer body has a fluid space that is sealed with respect to the atmosphere. A pressure monitoring system is in communication with the fluid space of the contingent layer body. An emergency pressure relief device is configured to release a pressure within the fluid space if a preset pressure is exceeded.

Disclosed is a fluid leak detection system for monitoring leaks in a pressurized vessel. The system includes a temperature sensor, a pressure sensor, and a processing module. The processing module is configured to any one or combination of: compare a temperature output from the temperature sensor to a reference temperature to produce a temperature differential; or compare a pressure output from the pressure sensor to a reference pressure to produce a pressure differential. The processing module is configured to any one or combination of: monitor the pressure differential to indicate when a leak occurs in a pressurized vessel; or monitor the temperature differential to indicate when a leak occurs in a pressurized vessel. The processing module is configured to generate an alert when a leak is detected.

An endoscope includes a first subassembly, a second subassembly, a third subassembly, and a fourth subassembly, which are sequentially assembled and tested in making the endoscope. The first subassembly includes a pressure-sealed electrical cable connected to an image capture unit. The second subassembly includes the first subassembly, a shell, a light pipe, and a lid. The third subassembly includes the second subassembly, a central tube, and a flange. The fourth subassembly includes the third subassembly, a base, a shaft, and optionally an articulating assembly.