Abstract: A communication device (100) is provided with a technique (400) for self-diagnosing an air leak. The leak is determined without having to open the communication device by applying a temporary excitation signal to the speaker terminals (402) to produce a damped response (404) and then monitoring the damped response (406) of the speaker.

Abstract: A system and method are provided for detecting a leak in an automotive fuel system. The functions of vacuum sensing, vacuum relief (high vacuum relief level) and pressure relief (high pressure relief level) are all performed by a single self-actuated diaphragm-seal valve mechanism.

Abstract: A system for verifying the integrity of a seal comprises an elastomeric seal on either side of a metal sealing gasket. A pressure test penetration is provided into an axial channel at a position between the metal sealing gasket and the lower of the elastomeric seals.

Abstract: Trace gas leak detectors and methods for trace gas leak detection of large leaks at relatively high test pressures are provided. A trace gas leak detector includes a test port to receive a sample containing a trace gas, the test port connected to a test line, a mass spectrometer to detect the trace gas, a high vacuum pump having an inlet port coupled to the inlet of the mass spectrometer, and a forepump having a main inlet, at least one intermediate inlet and an exhaust. The main inlet of the forepump is coupled to the exhaust port of the high vacuum pump. The intermediate inlet is controllably connected to the test line. The forepump is selected from the group consisting of a scroll vacuum pump and a screw vacuum pump.

Abstract: For leak testing closed containers (9) which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity (1) which is evacuated at least down to vapour pressure of that liquid component. The pressure in the surrounding of the container (9) and thus within test cavity (1) is monitored. Monitoring is performed by a vacuum pressure sensor (7), whereas lowering pressure surrounding the container (9) is performed by a vacuum pump (5). Leakage is detected by monitoring a pressure change in the surrounding of the container which is due to evaporation of liquid emerging from a leak and being evaporated in the low pressure surrounding.

Abstract: Device for measuring the permeation of a hollow body provided with an opening such as a neck in particular, this device comprising a chamber in which the follow body is placed, on a support; this hollow body, when placed on its support, together with the chamber defining an internal space and an external space, the device being provided with means for providing sealing between the internal space and the external space, the sealing means comprising three seals, namely a first seal, a second seal termed the intermediate seal, and a third seal, these three seals being housed in grooves belonging to the body of the support, these seals projecting from the side edge of the support and being able and configured to bear against the internal face of the opening of the hollow body; the body of the support, the opening of the object and the seals thus define two spaces positioned between the internal space and the external space, a first space being bordered by a first seal and an intermediate seal, the second space be

Abstract: In one aspect the method provides for determining changes in helium concentration over time in the interstitial space between a primary vessel that is charged with helium and a secondary vessel. The expected concentration resulting from permeation is calculated and accounted for. In another aspect, air is circulated in the interstitial space. An abrupt change in measured concentrations may be used to determine an approximate leak location.

Abstract: Apparatus and methods for detecting leaks in a heat exchangers use mass gas flow metering. A regulated gas supply passes through a mass flow meter before entering either the product chamber or media chamber of a heat exchanger. The regulated gas supply passes into the heat exchanger through an inlet connection. All other inlets and outlets to the testing chamber are closed and isolated so that the chamber holds an applied pressure. The chamber on the opposite side of the heat exchanger is opened to atmosphere. Once gas fills the chamber and a static pressure is realized, the test begins by simply monitoring gas flow. If no flow is indicated, no flow rate is detected, and there is no detectable leak. Gas flow into the test chamber, at any given flow rate, as sensed by the sensitive mass flow meter, is an indication that leakage between the chambers exists.

Abstract: For leak testing closed containers (9) which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity (1) which is evacuated at least down to vapour pressure of that liquid component. The pressure in the surrounding of the container (9) and thus within test cavity (1) is monitored. Monitoring is performed by a vacuum pressure sensor (7), whereas lowering pressure surrounding the container (9) is performed by a vacuum pump (5). Leakage is detected by monitoring a pressure change in the surrounding of the container which is due to evaporation of liquid emerging from a leak and being evaporated in the low pressure surrounding.

Abstract: According to some embodiments, a test fluid may be provided into a chamber associated with a cooling system for an electronic integrated circuit. Moreover, a valve may be partially inserted into an opening of the chamber to seal the chamber. The valve may include a first sealing portion to seal the chamber at the opening when the valve shaft is inserted the first distance. The valve may then be inserted an intermediate distance, between the first distance and a second distance, to unseal the chamber. Note that the valve may include a second sealing portion, offset from the first sealing portion, to seal the chamber at the opening when the valve is inserted the second distance. The valve may further define a passage, between the first and second sealing portions, to permit a flow of the test fluid when the valve is inserted the intermediate distance.

Abstract: A sensor assembly suitable for a vehicle fuel module assembly includes a plastic body defining a bore therethrough and having a barrier with a continuous peripheral edge encapsulated in the body. An aperture extends through the plate. A sensor chip is bonded to the plate over the aperture.

Abstract: For leak testing closed containers (9) which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity (1) which is evacuated at least down to vapour pressure of that liquid component. The pressure in the surrounding of the container (9) and thus within test cavity (1) is monitored. Monitoring is performed by a vacuum pressure sensor (7), whereas lowering pressure surrounding the container (9) is performed by a vacuum pump (5). Leakage is detected by monitoring a pressure change in the surrounding of the container which is due to evaporation of liquid emerging from a leak and being evaporated in the low pressure surrounding.

Abstract: Fluid storage and leak containment comprising (a) a fluid storage vessel comprising at least one vessel having an interior, an exterior, and an outlet opening between the interior and the exterior; (b) a fluid flow fitting sealably connected to the outlet opening and adjacent the exterior of the at least one vessel, wherein the fluid flow fitting is adapted for withdrawing reactive gas from the interior of the vessel; and (c) a containment enclosure having an interior, an exterior, an open end, and an extraction port adapted for the withdrawal of gas from the interior of the containment enclosure, wherein the open end is adapted to fit over and around the fluid flow fitting such that the containment enclosure surrounds the fluid flow fitting and is adapted to collect any reactive gas leaking from the fluid flow fitting.

Abstract: A method of measuring the squeeze force of a package includes applying a compression force to the package, and measuring the compression force as a function of volume change of the package. The compression force may be applied by placing the package in a force tester, and compressing the package with a movable crosshead. A device for measuring the squeeze force of a package containing a fluid may include a force tester and a fluid gauge, where the force tester includes a movable crosshead and a force gauge attached to the crosshead. The device may also include a holder to secure a bottle for testing.

Abstract: A system to first verify an adequate degree of hermeticity of a hermetic container in providing safe storage of a commodity by retaining sufficient hermeticity in a closed container and if satisfactory, loading a commodity in the container to self-verify the continued safe storage of the commodity by retaining sufficient hermeticity to protect the commodity from the effects of at least one of oxygen, humidity, insects and microflora in a hermetic container on the commodity therein. The hermetic container has at least one self-verifying component for measuring a parameter internal to the container, during and after manufacture, before and after placement of a commodity therein, and for providing the measurement externally to the container.

Abstract: A tank ventilating valve is disposed in a regeneration pipe which connects a storage container collecting fuel gas of a fuel tank to an intake pipe of the internal combustion engine. The tank ventilation system is air tightly sealed towards the atmosphere prevailing outside the motor vehicle while the tank ventilating valve is opened to create a negative pressure in the tank ventilation system. The method has the following steps: determining the fuel gas charge of the storage container; determining the volume flow rate through the tank ventilating valve; calculating an intermediate value from the product of the load and the volume flow rate; determining a tank pressure difference between the pressure prevailing in the fuel tank and the atmospheric pressure; and determining the additive corrective value by adjusting the intermediate value to the amount of the tank pressure difference.

Abstract: An instrument (10) for detecting and reporting the location of a leak in thin-walled hermetically sealed packaging (100) as between a seal leak and a side-wall leak. The instrument (10) includes a needle (20), a vacuum pump (40), and a means for creating at least two different steady-state differential pressure values across the packaging (100), a mass flow rate sensor (50), and at least one pressure sensor (31), a device for generating a perceptible signal (70) and a processor (60). The instrument (10) is operative for sensing the external pressure outside the packaging's (100) retention chamber, sensing the internal pressure within the retention chamber and transmitting an internal pressure signal, sensing the mass flow rate of gas pulled from the retention chamber, calculating flow rates and differential pressures thus indicating leaks.

Abstract: A leak detector apparatus for a pressurized cylinder having a cylinder of a radius (r) with a slidable piston in the cylinder with a gas filled chamber positioned between a cylinder end and the piston face. The length (L) of the chamber is calculated according to load changes on the piston where the volume (Vc) of the chamber changes. The pressure and temperature of the chamber are measured as well as the length. These values are inputted to a processor to solve the ideal gas law equation PV=nRT where a change in n for a change in length indicates a leak.

Abstract: A conduit is connected to the interstice between an outer and inner wall of a storage tank or the liner thereof and may be used to monitor the integrity of the interstice. The conduit comprises a coupling in fluid communication with the interstice, a tube connected at one end to the coupling and having a length sufficient to extend into a riser pipe of the tank. The conduit may also include a bushing holding the tube apart from the tank and providing for the variable positioning of the tube with respect to the tank. A method of monitoring the integrity of the interstice uses monitoring equipment connected to the conduit.

Abstract: In a leak testing apparatus and a method for manufacturing unleaky closed containers having first and second flexible wall areas with different flexibility characteristics, a biasing member is moved toward and onto the first flexible area and a force detector monitors a biasing force at the second flexible area. A container is considered unleaky if a difference signal from force measuring signals at first and second points in time fulfills a test criteria. Sampling the biasing force monitored which results in the first force measuring signal includes determining maximum biasing force signal value which occurs during a time span up to and including the first point in time.

Abstract: Method and device for determining the seal quality of packages, such as bags partially filled with products and protective gas. To this end these bags are directed between two opposing conveyors, the distance between these conveyors being less than the height of the packages, so that these are compressed. By taking measurements at one or two locations a verdict can be given on the seal quality of the packages. With this arrangement one of the conveyors is set up so that it can be moved relative to the other in order to ensure a more or less constant pressure on the packages. In order to achieve an accurate measurement it is proposed to measure the displacement resulting from this pressing on the packages at the conveyor that can be moved, using as reference the sub-frame of the conveyor that cannot be moved.

Abstract: A method of determining whether a vacuum/pressure sensor in a vehicle fuel tank correctly indicates a vacuum level in the tank. An input from the sensor is obtained. The tank is sealed for a predetermined time period. After the time period, another input is obtained from the sensor and the sensor inputs are compared.

Abstract: A method that includes providing a cavity defined by at least a portion of a mold and a closure member attached to the portion of the mold, the portion of the mold being oriented vertically and having a top and a bottom, and a sealing material being positioned near the bottom and attached to the closure member; puncturing the sealing material and the closure member with an instrument near the bottom, the puncturing creating an opening in the sealing material; and introducing a polymerizable composition into the cavity through the instrument. A method useful in testing sealing materials. Other methods are also disclosed.

Abstract: An inexpensive and compact leakage tester is provided, which performs a leakage determination on a measurement object automatically and with high accuracy. The leakage tester of the present invention includes; a pressurizing device for pressurizing the inside of a measurement object; a pressurizing controlling section for controlling the pressurizing device so as to perform a first pressurizing operation and a second pressurizing operation; a pressure detecting section for detecting a pressure value in the measurement object at the stoppage of the first pressurizing operation and a pressure change value in the measurement object after the stoppage of the second pressurizing operation; a volume estimating section for estimating a volume of the measurement object based on at least the pressure value; and a leak determination section for determining a leak state of the measurement object based on pressure change information and the pressure change value.

Abstract: An underground storage system includes a primary containment unit and a secondary containment unit arranged to sealingly encompass the primary containment unit. The underground storage system further includes a leak detection system which is fluidly connected to the secondary containment system, and which is adapted to detect fluid leaks in the primary containment system and the secondary containment system.

Abstract: The system for evaluating leaktightness is applied to a gas storage device for storing high pressure fuel gas delivered from a filling station via a filler hose connected to the gas storage device, itself comprising pipework and at least one tank, together with at least one check valve disposed between the pipework and the tank. The system comprises a pressure-measuring device that is suitable for connection to the filler hose or to the pipework, a processor device for processing values measured by the pressure-measuring device, and a display device for displaying information supplied by the processor device. The device for processing values measured by the pressure-measuring device includes a device for controlling filling and for suspending filling of the fuel gas storage device from the filling station, a device for controlling the filling flowing rate, a clock, and a unit for comparing the measured pressure relative to predetermined thresholds Si during periods in which filling is suspended.

Abstract: The invention is based on feeding the closed bodies to be evaluated to a station for the application of high voltage for the formation of the arc across the inner space of the body and capturing the arc formed by means of a CCD camera which will compare, adjustably, the luminous intensity of the arc created within the body subjected to checking with a threshold value determining whether the luminous intensity is above or below the threshold, which will be the rejection threshold, rejecting the bodies which do not comply with the predetermined threshold value, separating them from the whole of the accepted bodies.

Abstract: Leak testing a closed container with at least one flexible wall area is performed with the method and apparatus wherein a biasing arrangement compresses or expands the container under test. A biasing force is monitored with a force detector applicable to the wall of the container. The force detector generates an electric output first biasing force signal at a first point in time which is stored for comparison with the monitored biasing force signal at a second subsequent point in time to generate a difference signal as a leak indicative signal. Another difference signal is generated at the first point in time from the first force measuring signal stored and the first force measuring signal. This latter difference signal is stored as a zero offset signal which is used to compensate zero offset of the generated difference signal used as a leak indicative signal.

Abstract: For leak testing closed containers (9) which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity (1) which is evacuated at least down to vapor pressure of that liquid component. The pressure in the surrounding of the container (9) and thus within test cavity (1) is monitored. Monitoring is performed by a vacuum pressure sensor (7), whereas lowering pressure surrounding the container (9) is performed by a vacuum pump (5). Leakage is detected by monitoring a pressure change in the surrounding of the container which is due to evaporation of liquid emerging from a leak and being evaporated in the low pressure surrounding.

Abstract: An instrument and method for measuring the volume of a hermetically sealed, variable volume, pressure conforming container. The instrument includes a needle, a vacuum pump, a mass flow rate sensor and an integrator. The needle has a lumen operable for sealingly perforating a container and thereby placing the lumen of the needle in fluid communication with a retention chamber defined by the container. The vacuum pump evacuates the gaseous content from the retention chamber through the lumen defined by the needle and past a mass flow rate sensor for sensing mass flow rates pulled through the lumen and transmitting corresponding mass flow rate signals over time to the integrator. The integrator is programmed to integrate the received mass flow rate signals over time through achievement of an evacuated retention chamber to generate a total mass value, and calculate a volume from the total mass value employing the Ideal Gas Law.

Abstract: Methods and apparatus are provided for detecting leaks in a MEMS sensor package, and in particular, a MEMS sensor package that includes an oscillating structure or element that has a Quality (Q) value. The method and apparatus may include measuring the Q value of the MEMS sensor at a first time, applying a pressure to the outside of the MEMS sensor package, and measuring the Q value of the MEMS sensor at a second time after pressure has been applied for a period of time. A change in the measured Q values between the first time and the second time may be determined, which may then be correlated to a leak rate for the particular MEMS sensor package. In some cases, a leak rate of 2×10?13 He atm.cc/s or less may be detected.

Abstract: The present invention provides a testing assembly for pressure testing a plumbing system in a building where the building has a shower station with a drain and a shower inlet. The testing assembly includes a drain adapter, a hose fitting on the shower inlet, and a hose removably connecting the shower inlet and the drain adapter. The drain adapter has a hose end fitting and a drain sealing element in fluid communication with the hose end fitting. The sealing element is adapted to be in fluid communication with the drain.

Abstract: A leak-testing technique and apparatus for differential pressure sensor arrays is provided. A reference pressure sensor array is provided, wherein a seal is disposed between the reference pressure sensor array and a target differential pressure sensor array. A probe socket is utilized to communicate with each individual sensor in the reference pressure sensor array. The target pressure sensor array and the reference pressure sensor array are sealed via a pressure plate and plunger assembly. The target pressure sensor array, seal, and reference pressure sensor array are exposed to a first pressure. The target differential pressure sensor array, seal, and reference pressure sensor array are then exposed to a second pressure. The probe socket verifies that all reference pressure sensors continue to output the first pressure. If the probe socket identifies a reference pressure sensor that reads the second pressure, then the corresponding target pressure sensor is identified as being defective because of leakage.

Abstract: The invention relates to a method and a device for detecting leaks in the wall of a test object, container or similar, by measuring and evaluating changes that occur in a partial gas pressure. The invention aims to simplify the detection of leaks. To this end, changes that occur in partial pressures of oxygen are detected and evaluated using an oxygen sensor (4).

Abstract: An apparatus for inspecting sealed packages having volumetric dimensions includes a frame having an inlet and an outlet side, conveyor means for conveying packages along a path of transport from the inlet side through said frame towards said outlet side, and first inspection means disposed adjacent to said conveyor means and pivotally connected to said frame, such that upon being contacted by a package located on said conveyor means said first inspection means are pivoted around at least a first pivoting point. The first inspection means includes first counteracting means for applying a first load on said package urging said first inspection means against said package to be tested, and means for generating a first indication of the volumetric dimensions of said package.

Abstract: An apparatus for detecting an intrusion of an environmental substance into an environmentally sealed electronic components package. The electronic components package generally includes a plastic coated or plastic enclosed electronic component, that includes a printed circuit board and/or integrated circuits. The intrusion of the environmental substance into the electronic components package can be measured by one of a plurality of monitors. The monitors can detect the presence of the environmental substance and alert a user that a break in the seal of the electronic components package has occurred.

Abstract: A leak detection apparatus detects leaks or premature wearing in a lined fluid filled vessel. A leak detection apparatus comprises a current density meter, a power supply, and a probe. The probe is inserted into the fluid filled vessel. The power supply supplies an AC or DC electric current to a directional amplifier of the probe. A torroid of the probe senses the current density in the fluid and sends an electrical signal to the current density meter. The current density meter measures the electrical signal and communicates a current density readout to a display. This readout indicates to an operator whether or not there is a crack, premature wearing, or a bypass.

Abstract: A package inspection apparatus is provided, and includes a conveyor for transporting a package, a pressure unit for applying a compressive force to the package, a tracer movable over the upper surface of the package for measuring package attributes along a dimension of the package, and a processor. According to some embodiments, the processor determines a trace area of the package from the package measurement attributes. According to certain embodiments, the measured package attributes are compared to a running average, and if the package is within predetermined tolerances, the package measurement attributes are averaged into the running average. Also provided is a related method.

Abstract: An object of the present invention is to provide a seal condition inspection apparatus capable of reliably inspecting seal condition. The seal condition inspection apparatus includes an electrically-variable-quantity detecting section for detecting an electrically variable quantity at a portion (F) to be inspected for seal condition; a seal condition indicator value calculation processing means for calculating, on the basis of the electrically variable quantity, a seal condition indicator value indicative of seal condition of the portion (F) to be inspected; and a seal condition judgment processing means for judging from the seal condition indicator value whether seal condition is good or defective. In this case, the seal condition indicator value of the portion (F) to be inspected is calculated on the basis of the electrically variable value of the portion (F) to be inspected, and whether seal condition is good or defective is judged on the basis of the seal condition indicator value.

Abstract: A system for testing systems which are in turn used to test the leaktightness of a hollow body is suggested. Instead of the hollow body, a test body (2) is placed in the system which generates a defined pressure increase in a measuring chamber (4) within a pre-determined time span. This defined pressure increase corresponds exactly to the pressure increase generated by a hollow body with a small amount of leakage, wherein the hollow body can still just be regarded as leaktight. The test body can be configured as a glass capillary which extends in a sealing manner between two chambers with different air pressure. Alternatively, the test body can comprise a material which can accept a defined amount of moisture from the ambient atmosphere during storage. A vacuum formed around the test body causes moisture to be withdrawn from the test body and at least partially evaporated in the vacuum, which again leads to an increase in pressure in the chamber.

Abstract: A containment enclosure system at least a portion of which is double-walled. An exemplary system of the invention provides enhanced leak protection by monitoring the space within the double-walled portion of the containment enclosure system. The system is capable of providing continuous monitoring of the enclosure, collar, penetrations, and/or joints for potential leaks. Containment enclosures of the invention may be used as, used with, or attached to tanks, piping, dispensers, or any other type of storage container including vessels, boxes, sphere or containers of any shape. These containment enclosures may be underground, partially underground, or aboveground. In addition, these containment enclosures may be completely enclosed or enclosed on the bottom and sides with an open or covered top. Where these containment enclosures are attached to a storage tank or other storage container, embodiments also include the associated apparatus for affixing the enclosures to the storage tank or other storage container.

Abstract: A method, apparatus and system for testing characteristics of a material sample is provided. The system includes an apparatus configured to house the material test sample while defining a sealed volume against a surface of the material test sample. A source of pressurized fluid is in communication with, and configured to pressurize, the sealed volume. A load applying apparatus is configured to apply a defined load to the material sample while the sealed volume is monitored for leakage of the pressurized fluid. Thus, the inducement of surface defects such as microcracking and crazing may be detected and their effects analyzed for a given material. The material test samples may include laminar structures formed of, for example, carbon cloth phenolic, glass cloth phenolic, silica cloth phenolic materials or carbon-carbon materials. In one embodiment the system may be configured to analyze the material test sample while an across-ply loading is applied thereto.

Abstract: For leak testing closed containers (9) which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity (1) which is evacuated at least down to vapour pressure of that liquid component. The pressure in the surrounding of the container (9) and thus within test cavity (1) is monitored. Monitoring is performed by a vacuum pressure sensor (7), whereas lowering pressure surrounding the container (9) is performed by a vacuum pump (5). Leakage is detected by monitoring a pressure change in the surrounding of the container which is due to evaporation of liquid emerging from a leak and being evaporated in the low pressure surrounding.

Abstract: An apparatus for detecting an intrusion of an environmental substance into an environmentally sealed electronic components package. The electronic components package generally includes a plastic coated or plastic enclosed electronic component, that includes a printed circuit board and/or integrated circuits. The intrusion of the environmental substance into the electronic components package can be measured by one of a plurality of monitors. The monitors can detect the presence of the environmental substance and alert a user that a break in the seal of the electronic components package has occurred.

Abstract: A capped microsensor is described. It is suggested that a current conductor, positioned in the cavity and having at least two voltage taps, be provided, this configuration being used for seal testing, e.g., during quality control, by detecting at least one thermodynamic variable of a gaseous medium present inside the cavity via this configuration.

Abstract: The object of this invention is to provide a leakage-detecting device for sealed packages that is capable of performing detection continuously for all sealed packages when performing leakage detection for sealed packages. This invention comprises a conveyor belt 3 that continuously moves sealed packages W that are filled with detection gas for leakage detection and a leakage-detection unit 4 that detects leakage from said sealed package; and where the leakage-detection unit comprises a vibration-application means 5 that applies vibration to the detection gas inside the sealed package, and a gas-detection means 6 that detects leakage of the detection gas from the sealed package.

Abstract: The invention is concerned with apparatus and methods for measuring package permeability and/or permeant sorption. The apparatus includes a housing defining an inner sealed chamber that is substantially impervious to a permeant of interest. The chamber has an inlet for introducing an inert medium substantially free of the permeant and an outlet for removing the inert medium. A sensor is positioned within the chamber and to provide signals indicative of permeant concentrations. A sealable opening is provided in the housing for introducing, within the chamber, packages to be measured for permeability and/or permeant sorption. In the method, testing of permeant concentrations is cycled to determine the slope of a time line between a low and a high concentration of the permeant. Humidity and temperature are preferably maintained constant within the chamber during testing.

Abstract: A conveyor assembly 18 that detects bags that leak. The assembly 18 includes a first conveyor 24 that operates in unison with a second conveyor 29. The conveyors 24 and 29 confine the bags in chambers, with the bags being engaged by pressure assemblies 50 so that the bags that leak are reduced in volume. The bags are engaged at a downstream position and at an upstream position by detection devices 44 that provide a signal indicative of the volume of each bag. These signals are compared to thereby identify bags that leak.

Abstract: The invention relates to a chamber for the detection of leaks on foils (1). Said chamber comprises two frames (2, 3) which are connected together in an articulated manner, foils (4, 5) which are mounted on said frames, a test chamber (8) composed of the foils, a seal (12, 13, 18) arranged between the frames and at least one bore hole (7), preferably several bore holes, in at least one of the two frames (2, 3), which can be connected to the inlet of a vacuum pump (15, 16, 22). In order to improve the chamber's closing features, said chamber comprises an edge zone (14) wherein a vacuum can be created independently of the test chamber (8) and into which said bore holes (7) open out.

Abstract: A conductivity testing device includes a body containing a magnet positioned to magnetically attach a mounting surface of the body to a surface to be tested. A testing chamber has an opening substantially in a plane with the mounting surface and valves positioned to allow the introducion of a fixed volume of liquid into the chamber. The chamber is sealed to the surface by a tubular resilint seal. An agitating device is mounted in the chamber for agitating liquid introduced into the chamber to wash the enclosed surface area. A testing circuit includes probes positioned in the chamber and a meter for indicating conductivity of a solution contained within the chamber. The testing circuit is electrically coupled to the agitating device in a first mode and connected to the probes in a second mode for testing conductivity of a solution in the chamber.