The leak detector is utilized for determining the presence of a leak in an above ground tank of liquid having a lower specific gravity and a lower electrical or thermal conductivity than water. The leak detector includes a device for determining the level of water in the tank and a mechanism for sensing changes in the level of water in the tank over time. A leak detecting system utilizing the leak detector will also include an apparatus for determining the amount and rate of leakage relative to ...

A leak indicator including a housing that houses components of the indicator as well as a test leak, and test leaks that are suitable for integration into a leak indicator.

A leak detector apparatus, comprising as an integral part of its construction, an absorbant ring with a conductive strip running around its entire inner surface. The absorbant ring is placed inside a "U" shaped non-conductive ring that has a conductive strip running around the entire inner surface of the inside wall. The leak detector apparatus also comprises a low voltage power supply, a low voltage light, a test switch, a wall plate, and some insulated wire. The assembled rings act as a sensor...

Leak detector apparatus (40) is provided for use with a toilet inlet valve assembly (12) that includes a float (30) slidable along a vertical post (32), which can be easily installed by a handyman. The leak detector apparatus includes a buoyant body (42) and a mount (44) that pivotally supports the body about a body axis (54) on the float (30). The body has a forward end portion (56) that can engage the post to prevent the float from moving down until a chain device (60) attached to the rear of ...

Mass spectrometer leak detector and associated high vacuum pump and trace gas leak sample inlet connected so that the leak sample is fed to the outlet of the vacuum pump, backwards through the high vacuum pump and into the spectrometer. The invention is carried out through apparatus comprising a diffusion pump with a mass spectrometer connected to the pump inlet and a trace gas inlet connected to the diffusion pump foreline.

Method and apparatus is provided for detecting leaks in plastic bottles and other containers. The device is capable of testing such containers for leaks without relying upon an outside source of air to pressurize the container being tested and can do so at a faster rate than was heretofore possible. Pressured fluid is introduced into the bottle or other container to be tested from a self-contained unit. A pressure switch having a diaphragm type valve is used to detect the presence of a leak. Upo...

The leak detector comprises a source of fluid pressure connected by a conduit with a valve to a reservoir having the same capacity and thermal-diffusion time as the container under test. The reservoir is connected to the container being tested through a flow detector. A conduit which can be selectively opened and closed by-passes the flow detector to enable the container to be brought to the test pressure quickly. When the container is at test pressure the valve between the source and the reserv...

A leak detector comprises helium measuring means (6) for measuring helium sucked in by a sniffer (2) via a flexible hose (3) and a liquid nitrogen trap (5). A vacuum is maintained in the nitrogen trap (5) by a molecular diffusion pump (7) leading to a vacuum pump (18) which exhausts to the atmosphere. In order to speed the flow of gas, possibly including helium as a tracer element, along the flexible hose (3) most of the gas sucked in by the sniffer (2) is diverted from the inlet (4) to the nitr...

A method of determining the presence and location of leaks in a pipeline (2) comprising inserting a leak location device capable of detecting and recording the occurrence of noise into the flow of fluid (1) within the pipeline (2); allowing the leak location device to travel through the pipeline (2) with the fluid flow; causing the leak location device to detect and record noise in the fluid; and causing the leak location device to record the time at which noise is detected. Generally the leak l...

Apparatus is tested for leaks by enclosing it by an enclosure which includes a flexible bag in its walls, the bag passing through its mouth when the pressure in the enclosure changes as a result of a leak, or comprises a member which flexes as a result of sorption of leaking materials.