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5546009 |
Detector system using extremely low power to sense the presence or absence of an inert or hazardous fuild
A fluid detection system capable of detecting the smallest amount of liquid chemicals, mixtures, aqueous solutions, pure water and others by detecting very low levels of resistance or conductance...
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5543719 |
Barrier leak detection using electrokinetic ION transport
Procedures and apparatuses for determining the integrity of a geophysical barrier are provided. In particular, an electropotential gradient is established across the barrier in an attempt to drive...
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5541575 |
Leakage detection system
A leakage detection system is provided having a plurality of locally distributed integrated units with a leakage sensor, preprocessing unit, and evaluation unit which connects with the individual...
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5540085 |
Method of measuring leakage position in impervious bottom sheet using electrodes mounted on both surfaces of the sheet and apparatus therefor
A method for detecting a leakage position in an impervious sheet, which comprises disposing a first and a second electrode units on an upper side and a lower side of the impervious sheet,...
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5537858 |
System for the nonintrusive monitoring of electrical circuit breaker vessel pressure
A sensitive to a change in the physical dimension(s) of the exterior surface of a pressure vessel transducer and attached to the exterior surface thereof the pressure vessel may be a vacuum...
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5539384 |
Electronic water utility safety apparatus
An electronic water utility safety apparatus comprising a control box positionable within the house of a user. A display indicates a sensed water pressure. An indicator is mounted in the box to...
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5537095 |
Incontinence detection device
An incontinence detection device comprising a pad with a plurality of circuits. The circuit conductors are spaced on the pad, with each of the circuits defining a linear dimension across a...
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5529668 |
Detection of potential for corrosion of steel reinforced composite pipe
This method and apparatus detects the potential for corrosion of pipes fabricated out of conductive material embedded in non-conductive material, due to contact between a conductive medium foreign...
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5526679 |
Automatically calibrated pressurized piping leak detector
A pressure decay leak detection system is calibrated for a particular piping system using a leak mechanism with a known leak rate attached to the piping system. Pressure decay in the piping system...
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5517181 |
Hazardous fluid leak detector
A device or system for monitoring for the presence of leaks from a hazardous fluid is disclosed which uses two electrodes immersed in deionized water. A gas is passed through an enclosed space in...
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5514338 |
Device for sensing liquid hydrocarbon
A device is disclosed for sensing any of a wide range of liquid hydrocarbons. A ribbon-like sensor is employed, which has an inner, silicone rubber layer and an outer, silicone rubber layer and...
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5502435 |
Method and system for monitoring circuit breaker gas pressure
A method and system are provided for monitoring the pressure of gas in a gas filled circuit breaker container based on a temperature compensated gas pressure signal which is compared with a signal...
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5481904 |
Oil spillage detector
An oil spill sensing/communicating apparatus which is buoyantly situated, anchored or adrift, in a salt or fresh body of water, featuring a configuration which permits fluid passage therethrough of...
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5467641 |
Method of and apparatus for detecting fuel system leak
The existence of an unacceptable vapor leak can be determined by monitoring the pressure within a fuel system of an internal combustion engine. Once the engine is switched off, a period is timed to...
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5469146 |
Device for attaching to and detecting wetness in diapers
A device for attaching to and detecting wetness in diapers. The device including a pair of probes (28) supported on a module box (10) slidably mounted between the guides (36) of a slide section...
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5463377 |
Apparatus for detecting the presence of a liquid
An apparatus for detecting the presence of a liquid in a region, including an electrically passive sensor adapted for contacting the liquid, and an electrically active detector. The sensor is a...
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5461903 |
Apparatus and method for detecting leak in hydraulic system
An apparatus and method for detecting a leak in a closed, fluid transfer system, specifically a hydraulic system, by comparing the actual rate of fluid level change in the fluid reservoir to the...
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5449017 |
Proximity sensing probe
A capacitive proximity monitoring device for corrosive atmosphere environments comprising a capacitance field element or sensing element disposed in such a corrosive atmosphere environment and...
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5445010 |
Leak detection of underground or otherwise inaccessible liquid storage tanks
A test procedure for the testing liquid storage tanks, for leakage, comprises: immersing at least part of test equipment in the liquid in question and fixing the equipment in position with respect...
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5440917 |
Leak detector
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...
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5412977 |
Turbo machine with an axial dry gas seal
In a turbo machine, for example, a turbo compressor, the rotor shaft extends through and is sealed relative a housing via dry gas seals in which a seal clearance is achieved between a rotating,...
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5410255 |
Method and apparatus for detecting and distinguishing leaks using reflectometry and conductivity tests
A method and apparatus for detecting and locating fluid leaks, particularly liquid leaks, and determining whether the leaking liquid being detected is a non-conductive liquid such as a hydrocarbon...
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5402110 |
Hydraulic fluid leak detection system and method
A system such as one for detecting when a hydraulic fluid system adapted to a turf care machine, has developed a leak and to warn the machine operator of such a leak before an appreciable amount of...
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5400646 |
Fluid containment monitoring system
An electronic monitoring system to accurately measure a vacuum in an interstice between inner and outer walls of a dual-wall container or pipe which allows highly accurate analysis of vacuum...
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5377529 |
Leak detecting device, and method of constructing and utilizing same
A system for monitoring fluid flow in a water supply for detection of leakage. The system includes sensing means for detecting fluid flow and generating a proportional pulse, timing and memory...
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5376927 |
Programmable fluid detector with pressure probe discriminator
A hydrocarbon leak detection system has a microprocessor based controller for receiving inputs from transducers and comparing the inputs against stored decision criteria to determine if...
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5372032 |
Pressurized piping line leak detector
A line leak detector system that requires no existing piping modifiction for installation. The system consists of a controller and transducer and installs at existing fuel dispensers. The two...
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5363093 |
Method and apparatus for continuous tank monitoring
Method and apparatus for continuously monitoring the volume of liquid in an underground storage tank and producing data for reconciling volume with throughput. This invention provides a set of...
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5357241 |
Fail-safe leak detector
A fail-safe system for the detection of water leaks, and for the prevention of damage therefrom. In a home or building which includes a hot-water tank and a water tank for a toilet, e.g., the...
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5357202 |
Plural electrode method for measuring subsurface changes in conductivity as an indication of fluid migration
A method and apparatus for monitoring and locating the presence of fluids beyond a containment vessel. A multiplicity of plates having conductive affinity are strategically oriented adjacent the...
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5355720 |
Corrosion resistant cable
A corrosion resistant cable for use in electrical detection systems for fluid leaks in pipelines and the like includes a central electrical conductor, annular spacer means of electrically...
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5355324 |
Detecting leakage of fluid from a conduit
A method is provided to detect leakage from a conduit through which a stream of fluid flows and to indicate when there is a leakage condition or a no leakage condition. The method includes...
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5351037 |
Refrigerant gas leak detector
A refrigerant gas leak detector for detecting the location of leaks of refrigerant gas such as halogen has a sensing tip with a pair of electrodes across which a relatively high voltage is...
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5351008 |
Portable and disposable device for detecting holes or leaks in a surgical or examination glove
Portable and disposable apparatus for leak testing surgical and/or examination gloves which may be worn on the body of the user to permit convenient detection of glove leaks during diagnostic...
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5347264 |
Method and apparatus for automatically controlling a water supply using movement detector means
The method and apparatus relates to a procedure and an arrangement for minimizing the risk of the undesired escape of water from pipe systems and units connected thereto in premises and similar...
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5345224 |
Leak detection and management apparatus including a programmable message device for a hot water heater
A leak detection and management apparatus including a programmable message device, for a hot water heater. The apparatus includes a liquid pan disposed beneath and concentrically with a hot water...
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5343191 |
Pipeline leak detection system
A system for detecting leaks in a pipeline includes an outer containment pipe or jacket surrounding a pipe and defining an interstitial space therewith. A plurality of zone fittings are disposed...
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5341128 |
Sensor element for detection of hydrocarbons
A sensor for detecting the presence of hydrocarbons and hydrocarbon containing fluids. It is formed of a first conductor which is formed of a metal wire or metal foil covered by an insulative...
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5334973 |
Leak detection and shut-off apparatus
A leak detection and shut-off apparatus for preventing damage from leaking hot water tanks. The invention features a unique three-layered sensor that completes encases the hot water tank thus...
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5334970 |
Alarm system
An alarm system includes alarm monitoring subsystems coupled by communication links to a central alarm processing subsystem. Each alarm processing subsystem includes sensor strings for detecting...
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5331840 |
Detection of a gas leaked into a liquid which has been sampled from a plurality of spaces
A method for discovering amounts of halogen in a liquid is provided wherein the a reservoir comprising the liquid and suspected halogen is healed to a temperature characteristic of the solubility...
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5325706 |
Dispenser leak detection
A fuel dispensing apparatus includes a fuel reservoir having a pump to pump fuel from the reservoir into a first leg of piping. A master dispenser downstream of the first leg of piping has an...
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5325312 |
Intelligent pressure probe
A pressure transducer, a microprocessor, and associated electronics are enclosed in a probe housing which may be attached to a liquid product line with the pressure transducer responsive to the...
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5323142 |
Accessory for detecting leaking of safety valves
An accessory for detecting leaking and flowing conditions in safety valves and safety relief valves utilizes a load sensing device to sense a change in a load on the valve of the safety relief...
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5316035 |
Capacitive proximity monitoring device for corrosive atmosphere environment
A capacitive proximity monitoring device for corrosive atmosphere environments comprising a capacitance field element or sensing element disposed in such a corrosive atmosphere environment and...
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5315529 |
Fluid vessel leak existence system, method and apparatus
A method, system and apparatus for monitoring an environment for the occurrence of an unexpected event, such as monitoring a containment vessel's surroundings for the presence of the contained...
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5315291 |
Leak detection device
A leak detection device for preventing damage from leaking hot water tanks. The invention features a unique three layered sensor that completely encircles the hot water tank thus detecting the...
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5301538 |
Process and apparatus for distributed wide range leak detection, location and alarm for pollutants
Duel sensor detector tube systems are installed along the path length of a pipeline, storage tanks, or other fuel system to be monitored for leaks. One sensor detector tube system is constantly...
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5293771 |
Gas leak sensor system
A gas leak sensor system detects the presence of gas leaking into any one of a plurality of test spaces for example, refrigeration gas into a refrigeration case. A plurality of tubes extend from...
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5288168 |
Method and apparatus for lining outdoor fluid containment areas to facilitate electrical leak detection
An improved method and apparatus for waterproofing soil utilizing a flexible plastic sheet for providing a water barrier provides a system for readily detecting the presence of holes in the plastic...
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