Abstract: The invention provides a level transmitter for liquid containers, particularly fuel store tanks, comprising a housing in which a contactless sensor is arranged which is connected with an evaluating unit and operatively connected with a magnet that moves relative to the sensor when a float arranged at a first end of a lever moves so that the change of the magnetic field acting upon the sensor is transformed into an electric signal so that an output signal corresponding to the level of the liquid in the container is obtainable by the evaluating means. It is characterized in that the magnet (5) is configured at least as a segment of an annular magnet (5) that is arranged at a second end of the lever (3) and integrated therein.

Abstract: A device indicates the level of concrete within the hopper of a concrete pump and prevent accidental overflow and spills. The concrete level indicator device includes an elongate post with an enlarge float fixed to the bottom end and a guide sleeve for allowing vertical telescoping movement of the post as the concrete level in this hopper changes. A retaining collar attaches to a screen in the hopper of the pump and surrounds the guide sleeve for limiting swinging movement of the post and guide sleeve, thereby maintaining the device in a vertical position within the hopper with the float resting on the concrete. As concrete is filled into the hopper, the post rises through the guide sleeve until a visual indicator (e.g. a red band) on the top end of the post is visibly exposed above the guide sleeve, thereby alerting the operator to interrupt the discharge of concrete being filled in the hopper until the concrete level drops and the visible indicator on the post is no longer visible.

Abstract: A flexible liquid level sensor board assembly for application with liquid level sending units is presented. The liquid level sending unit includes a stem, float, and a flexible sensor board assembly. The flexible sensor board assembly is a distinct component of the sending unit and as such is capable of repeated insertion and removal from the stem. The flexible sensor board assembly is therefore ideal for existing/retrofit applications and new installations alike.

Abstract: A liquid remaining-amount detecting system includes a displacement transmitting part for transmitting displacement of a float to a rotation-angle sensor and including a bracket mounted to the bottom of a tank, an arm having a base end mounted to the bracket and a front end mounted to the float, and a link mechanism for coupling the rotation-angle sensor and the base end of the arm. The link mechanism serves to cancel displacement of the float resulting from vertical displacement of the bottom of the tank.

Abstract: A fuel level sensor that includes a housing having a cavity formed therein, and a resistor element disposed within the cavity for creating a signal that may be utilized to indicate a liquid fuel level within a fuel tank. A float lever is associated with the housing adjacent a first end and adjacent a second end with a float that is responsive to the level liquid fuel in the fuel tank. The float lever includes a first magnet that is disposed adjacent to the housing. A wiper and contact assembly is positioned generally adjacent to the resistor element to generate a signal that may be used to indicate a liquid fuel level. The wiper and contact assembly includes a second magnet that is magnetically coupled with the first magnet so that movement of the float lever is translated to movement of the wiper and contact assembly.

Abstract: In a fuel tank level sensor 1 for measuring a remaining amount of fuel in accordance with a resistance value which is varied by moving a rheostat 1a utilizing a float 1c that vertically moves according to increase and decrease of the fuel in a fuel tank 2, change in resistance value of the rheostat 1a includes a linear range in which the resistance value linearly varies with the increase and decrease of the fuel, and a non-linear range in which the resistance value discontinuously varies under full-tank conditions where the fuel tank is substantially filled up with the fuel. Even upon undesirable increase of the resistance value of the rheostat 1a as a result of deposition of sulfides, the sensor 1 can always detect accurately that the fuel tank 2 is filled up.

Abstract: Known fill level transducers are disposed in the open in a tank and thus exposed to the sometimes aggressive liquid in the tank. It is a disadvantage that from the liquid, unwanted deposits often occur on a potentiometer of the fill level transducer. The fill level transducer of the invention protects the potentiometer against the liquid contained in the tank in that the potentiometer is sealed off tightly from the tank and the liquid located in it, and that the fill level transducer has a float arm, which is in contactless operative connection with a wiper arm of the potentiometer.

Abstract: A system for detecting the level of liquid in a tank includes a sensor part provided to the tank and for sensing a position of the liquid level in accordance with displacement of a float, and a sensor casing arranged in the tank to be isolated from liquid and for accommodating the sensor part.

Abstract: A liquid level detecting device to be disposed in a liquid tank includes a body, a float arm having a float to be disposed in liquid, a resinous arm holder fixed to the body to hold the float arm so that the float arm moves as a level of the liquid changes, a circuit board fixed to the body, an elastic metal plate member having a sliding contact which slides on a sliding surface of the circuit board under a biasing force and a fixing member for fixing the elastic metal plate member to the arm holder. The resinous arm holder has an engagement hole portion and the fixing member has at least a pair of claws which extends along a slit between them and inserted into the engagement hole portion so that the pair of claws elastically deforms in a direction to narrow the slit.

Abstract: A liquid level sensor includes a housing, a rotary shaft which is rotatably provided in the housing, a magnet which is fixed to the rotary shaft, and rotating together with the rotary shaft, a pair of stators which are disposed so as to face an outer peripheral surface of the magnet, and an electronic circuit which includes at least a set of terminals and a magnetoelectric transducing element for detecting a change of magnetic flux in the stators caused by rotation of the magnet and for outputting an electric signal. The magnetoelectric transducing element and the stators are electrically connected and fixed to the set of terminals so that a terminal assembly is formed. The housing is formed by insert molding the terminal assembly with resin so that the terminal assembly is embedded in the housing.

Abstract: A liquid level detecting device to be disposed in a liquid tank includes a body, a float arm having a float to be disposed in liquid, a resinous arm holder fixed to the body to hold the float arm so that the float arm moves as a level of the liquid changes, a circuit board fixed to the body, an elastic metal plate member having a sliding contact which slides on a sliding surface of the circuit board under a biasing force and a fixing member for fixing the elastic metal plate member to the arm holder. The resinous arm holder has an engagement hole portion and the fixing member has at least a pair of claws which extends along a slit between them and inserted into the engagement hole portion so that the pair of claws elastically deforms in a direction to narrow the slit.

Abstract: A dial assembly with magnetic calibration feature adapted for use as part of a gauge assembly for measuring fluid levels in cryogenic applications is disclosed. The dial assembly includes a base, a pivot pin extending from the base, a pointer assembly pivotally mounted on the pivot pin, and a calibration magnet with adjustment feature. The pointer assembly includes a pointer coupled with a pointer magnet. The calibration magnet with adjustment feature is magnetically coupled to the pointer magnet and adapted to adjust a position of the pointer magnet and therefore the pointer relative to volume indicia on a dial face of the dial assembly. In operation, a movement of the calibration magnet induces a movement in the pointer magnet. The adjustment feature is coupled to the calibration magnet such that it is manipulatable even when the dial assembly is mounted on a gauge head of a gauge assembly installed on a vessel.

Abstract: A tank liquid level or volume gauge for use with volatile materials, such as propane, stored under pressure as liquid and released as gas, includes a float with a float magnet that couples with a liquid level indicator magnet across a fluid impermeable wall to provide indication of tank liquid level or volume. In another embodiment, when a predetermined tank liquid level or volume is reached during filling, the float actuates an inlet closure valve to increase inlet flow resistance, creating a shutoff signal.

Abstract: A remote two-module electronic fluid monitoring system to be used as an agricultural aid in the application of a fluid to a field. A tank module sits atop a field tank and monitors internal fluid level. Fluid level detection is achieved by tracking the position of an embedded permanent magnet associated with a given internal fluid level within an existing float gauge mechanism. An integrated circuit capable of precisely detecting the orientation of magnetic fields senses the angular position of an existing magnet and outputs an angular field reading to an interfaced microcontroller which then translates angular reading to fluid level. The tank module contains a radio frequency transmitter which then sends fluid level information to a display module mounted within the tractor cab. The display module receives the signal from the tank module and reports to the user the present fluid level remaining in tank via a liquid crystal display.

Abstract: A sensor is provided in one illustrative embodiment that includes a microcontroller that executes a program that generates quadrature output signals that indicate the change in a parameter being measured. As an example, the sensor could comprise a linear position transducer. The quadrature output signals can comprise square wave signals that are ninety degrees out of phase, each transition of the signals representing a unit of change in position of the measured mass. According to another aspect, the quadrature signals can be placed into phase with one another to indicate an error condition. In another aspect, user inputs can be provided to allow the user to select parameters such as frequency, update rate, and/or resolution. Moreover, at least one of the sensor inputs can be utilized to load calibration factor data for the sensor.

Abstract: A liquid level measuring apparatus is provided, which includes an input circuit configured to receive electrical signals from level sensors configured to provide an electrical signal proportional to a liquid level in a tank portion. The input circuit provides a single output signal proportional to the combined liquid level in one or more liquid storage vessel portions. The apparatus may further include or be connected to a transmitter such as a wireless transmitting device.

Abstract: A fuel level sensor is provided having a flexible printed circuit cylinder, having a buoyant member mounted on a rod and a contact member mounted on the buoyant member which abuttingly contacts the rod and the conductive traces formed on the inside of the flexible cylinder wall.

Abstract: A remote two-module electronic fluid monitoring system. A tank module sits atop a field tank and monitors internal fluid level. Fluid level detection is achieved by tracking the position of an embedded permanent magnet associated with a given internal fluid level within an existing float gauge mechanism. An integrated circuit capable of precisely detecting the orientation of magnetic fields senses the angular position of an existing magnet and outputs an angular field reading to an interfaced microcontroller which then translates angular reading to fluid level. The tank module contains a radio frequency transmitter which then sends fluid level information to a display module. The display module receives the signal from the tank module and reports to the user the present fluid level remaining in the tank via a liquid crystal display.

Abstract: Apparatus and method for measuring the volume of a liquid in a fuel tank in a vehicle subject to varying external forces caused by movement or changes in the roll and pitch angles of the vehicle wherein the tank is mounted to the vehicle and subject to forces along the yaw axis of the vehicle. One or more tank load cells provides an output proportionally representing the load thereon. The load cells are placed between a portion of the tank and a portion of a reference surface of the vehicle and are sensitive along an axis that is substantially normal to the mounting surface and generally parallel to the yaw axis of the vehicle. A processor executes a derived relationship between the load cell output and the volume of fuel in the tank so as to convert the output signal from the load cell into output information representative of the volume of the fuel in the tank.

Abstract: A float, including rubber material for sensing liquid levels having a chemically resistant protective covering said float having greater resistance to attach from chemicals, such as hydrocarbons, acids, and chlorinated solvents, said float may be made to include magnets, guiding devices or sensors. Also disclosed is the method for manufacturing the float of this invention including the steps of milling acrylonitrile rubber, phenolic resin, sulfur and various additives in a Banbury mill and mixing at an elevated temperature below 250°, compression molding at up to 900 psi pressure between 250° and 350° F., cooling and filling a pre made protective skin container with the mixture, closing the container and heating the sealed container to bond the mixture to the container skin.

Abstract: A liquid level detecting apparatus in which an error due to a scatter of the temperature characteristics and sensitivity of magnetic sensors is held down is provided which has a float 5 floating on a liquid level, a magnetic member 7 adapted to be turned in accordance with variation of a position of the float 5 accompanied by the fluctuation of the liquid level, and magnetic sensors 8a, 8b adapted to output detection signals varying in accordance with a rotation of the magnetic member 7, the apparatus including two magnetic sensors 8a, 8b, a control unit 100 adapted to receive detection signals outputted from the two magnetic sensors 8a, 8b and compute a liquid quantity value on the basis of the detection signals, and a display unit 102 adapted to shown thereon a liquid level on the basis of the liquid quantity value computed by the control unit 100.

Abstract: A level sensor mechanism for detecting liquid levels in storage tanks. A conduit is provided having an upper portion and a lower portion. The conduit may be adapted to receive a cable therein, may be substantially rigid and adapted to resist deflection. A sensor assembly body is provided and adapted to locate a level sensor therein. The sensor assembly body may be located in fixed relation to said conduit, and may be rigidly composed and adapted to resist deflection. A coupling member may be secured to said lower portion of said conduit, said coupling member fixedly securing said conduit to said sensor assembly body, said sensor assembly body being secured on said offset portion of said coupling member. The level sensor mechanism may thereby resist or eliminate deflection through the construction of the conduit, coupling member and sensor assembly body.

Abstract: A remote two-module electronic fluid monitoring system to be used as an agricultural aid in the application of a fluid to a field. A tank module sits atop a field tank and monitors internal fluid level. Fluid level detection is achieved by tracking the position of an embedded permanent magnet associated with a given internal fluid level within an existing float gauge mechanism. An integrated circuit capable of precisely detecting the orientation of magnetic fields senses the angular position of an existing magnet and outputs an angular field reading to an interfaced microcontroller which then translates angular reading to fluid level. The tank module contains a radio frequency transmitter which then sends fluid level information to a display module mounted within the tractor cab. The display module receives the signal from the tank module and reports to the user the present fluid level remaining in tank via a liquid crystal display.

Abstract: A liquid level indicator for an oil-filled transformer, power choke or tap changer in which a sensor part has a float which rises and falls with the oil level and rotates a sensor shaft and the sensor shaft is coupled to an indicator shaft on which a pointer is provided to cooperate with a dial. The gauge also includes a contactless angle encoder operating with a magnetic hub and coupled to the indicator shaft for outputting a signal representing the oil level.

Abstract: A liquid level gauge assembly that has particular utility for petroleum products has a threaded cylindrical projection that allows quick installation onto a storage tank. The gauge assembly operates by measuring the displacement of a float member through a filament that extends through a restrictive opening in the outer housing of the gauge assembly. An adapter is connected to the free end of the filament outside the outer housing. The opening is sized so that the adapter is prevented from passing therethrough, thus preventing the filament from retracting completely into the housing. The gauge assembly also includes an electronic level or volume monitoring system.

Abstract: A carburetor fuel level management system includes a fuel level sensor mounted in the float bowl of the carburetor for monitoring actual fuel level and providing a signal indicative of the fuel level. The sensor may be used for data acquisition and/or to provide feedback to a controller which maintains fuel level at or near a preferred level by varying fuel flow rate into the float bowl in response to an indication from the sensor that the actual fuel level differs from the preferred fuel level. Fuel flow rate may be controlled by selectively bypassing a fuel pressure regulator in the carburetor inlet line or by varying voltage to an electric fuel pump, among other methods.

Abstract: The fuel liquid level detection section 31 for detecting the liquid level of the fuel within the fuel tank 2 is provided within the housing casing 10 so as to cover the range from the full amount to the small remaining amount of the fuel within the fuel tank 2.

Abstract: A water feeder controller for a boiler monitors a low water cutoff sensor in a boiler and uses a feed timer to feed water to the boiler for a predetermined feed period of time. The feed timer brings the water level in the boiler well above the low water cutoff sensor. The feed timer supplies water to the boiler only if the low water cutoff sensor continues to indicate a low water level for a delay period of time measured by a delay timer. A resettable display indicates the quantity of water supplied by the water feeder to the boiler based on a feed counter incremented during water feeding. A manual feed button allows water to be manually fed to the boiler. The quantity of water manually supplied to the boiler is also shown on the display. The feed timer and delay timer are preferably implemented in software in a microcontroller in the water feeder controller. A lockout loop in the software prevents overfeeding of water to the boiler in the event of a failure of the low water cutoff sensor.

Abstract: The invention concerns a drawing and gauging device for a motor vehicle fuel tank, characterised in that it comprises two support assemblies (100, 200) mobile relative to each other when the device is being installed on site for use in the motor vehicle and an arm (450) pivotally mounted on one of the support assemblies bearing a gauging transducer (400), the arm (450) being maintained in retracted position, when stored, by the other element (200), such that the arm (450) is automatically unfolded when the device is installed.

Abstract: A level meter for motor vehicle fuel tanks comprises a float element (26). With the float element (26), a lever (18) is connected that is adapted to be pivoted about a pivot axis (28). Further, the level meter comprises a position sensor (10) as well as a position transmitter (16) connected with the lever (18). At the level of the position sensor (10), the position transmitter (16) is connected with the lever (18). According to the invention, the position transmitter (16) cooperates with the position sensor (10) in a contactless manner.

Abstract: A safety device for water dispenser includes a magnetic tube, and a float. The tube sticks up on bottom of a water container. A first, and a second magnet switches are disposed in the tube, and connected in series. The float is movably fitted around the tube, and has a magnet ring, which can, when moved close to the first switch, make the first switch become conductible if there is sufficient water in the container. A weighted magnet ring is movably fitted around the tube. The weighted ring is normally close to the second switch due to gravity to make the same become conductible. Therefore, heating device of the dispenser can be activated when there is sufficient water. When the container are made to fall over, the weighted ring moves away from the corresponding switch to leave the same not-conductible, preventing the heating device from being activated.

Abstract: An in-tank fuel module for a fuel tank having a conductive lead for connection to an electrical ground plane and at least a first electrically conductive component, and a conductive polymeric strand electrically connecting the component to the lead. A jet aspiration pump is made of conductive polymeric material. A conductive component is connected to the ground plane through the fuel level sensing assembly circuit.

Abstract: A compact ball tap with 1 a water level switch which comprises a guide standpipe 5 vertically arranged in a tank T, a float 6 slidably installed on the guide standpipe 5, a valve 3, a lever 4 controlling an open-close action of the valve 3 connected with the float 6, and a water level switch 29 transmitting predetermined control signals when the float 6 shifts to a predetermined water level, wherein one float 6 is shared by the ball tap 1 and the water level switch 29.

Abstract: A grounded wiper assembly for a fuel sensor includes a wiper housing for rotation relative to a variable resistor and a wiper with at least one contact operatively supported by the wiper housing for contacting the variable resistor as the wiper housing rotates. The grounded wiper assembly includes a float arm connected to the wiper housing and a float connected to the float arm such that the float moves the float arm and the wiper housing relative to the variable resistor as a level of fuel increases and decreases in the fuel tank. The grounded wiper assembly further includes a conductor interconnecting the float arm and the wiper to bleed off electrical charges attached to fuel to ground.

Abstract: A non-contact type liquid level sensor includes a sensor housing; a rotary shaft, rotatably mounted on the sensor housing; a float, vertically movable with a change of a liquid level; a float arm, having a first end mounted on the float, and a second end coupled to the rotary shaft such that the rotary shaft is rotated with a vertical movement of the float; an annular magnet, coupled to the rotary shaft, and rotating together with the rotary shaft; a pair of arcuate stators, disposed in the sensor housing so as to confront an outer peripheral surface of the magnet; and a magnetoelectric transducing element, disposed between the first ends of the stators, for detecting a change of a magnetic flux density in the stators, which is caused by a turn of the magnet, and for converting the detected change of the magnetic flux density into an electrical signal. Second ends of the stators are spaced from each other to form a gap having an opening angle within a range from 50° to 200°.

Abstract: A magnetic level indicating system comprises a chamber for fluidic coupling to a process vessel whereby material level in the vessel equalizes with material level in the chamber. A magnet actuated visual indicator is mounted to the chamber for indicating level in the chamber. A float is in the chamber for rising and falling with material level in the chamber. The float comprises a tubular wall defining an interior space. A plurality of elongate magnets are in the interior space. The magnets are parallel to the axis of the tubular wall and are circumferentially spaced along the tubular wall. A circular retainer in the interior space has circumferentially spaced notches receiving the magnets and retaining the magnets along the tubular wall.

Abstract: This invention relates to a novel engine oil system which automatically or manually replenishes oil in the crankcase from an onboard oil reservoir system. An oil level indicator and oil refill device comprising: (a) a source of electrical power; (b) an engine crankcase; (c) an oil level float in the crankcase; (d) a first electrical contact point associated with the oil level float; (e) a second electrical contact point located at a predetermined level in the crankcase; (f) an oil reservoir; and (g) an electrical solenoid valve connected to the source of electrical power and the oil reservoir and normally in a closed position, the solenoid valve being activated when the first electrical contact point contacts the second electrical contact point and opening the solenoid valve and permitting oil to drain from the oil reservoir to the crankcase, said solenoid valve closing when the first electrical contact point rises with oil level and ceases to contact the second electrical contact point.

Abstract: A fluid level indicator for a fluid container of a motor vehicle, including a housing having at least one opening through which a fluid may flow; a float disposed to move in the housing; and a first magnet integrated with the float; wherein the first magnet is functionally connected to a first non-contact sensor integrated into the housing; and wherein the float carries out a translational motion relative to the housing when fluid flows into or out of the at least one opening.

Abstract: A liquid level sensor is provided for use with a container. The sensor protrudes through an opening in the container. The sensor includes a float linked by means of a linkage to a first magnet axially rotatable on a first axis. The first magnet has a magnetic moment with a nonzero component at a right angle to the axis. A divider separates the first magnet from a second magnet having a magnetization and axially rotatable on a second axis. The second magnet has a nonzero magnetic moment at a right angle to the second axis. The first and second magnets are juxtaposed in magnetic linkage so that the second magnet is urged to follow the first magnet in rotation. The divider plugs the opening in the container. A magnetic field sensor is positioned to sense axial magnetic field strength at a location offset from the second axis.

Abstract: The present invention is directed generally to a gauge with a body. A twisted wire is disposed through the body, and an indicator is fixedly disposed on the twisted wire. A light source is disposed adjacent the body to illuminate the indicator. In addition, a float is slidably disposed on the twisted wire in a fixed orientation with respect to the body such that movement of the float along the twisted wire rotates the twisted wire and the indicator. The present invention also provides for the construction of a fuel tank and a snowmobile that include this gauge.

Abstract: An in-tank fuel level sender (26) for signaling the level of liquid fuel in a motor vehicle fuel tank (22). An enclosure (31) forming a hub of the sender provides an interior that is sealed against intrusion of fuel. An actuator (110, 122) is positionable on an exterior of the enclosure in correlation with liquid fuel level. A movement (52) within the interior of the enclosure follows the positioning of the actuator. An electric circuit element (62; 86) within the interior of the enclosure is operated by the movement to provide an electric characteristic for transmission through the enclosure to signal the liquid fuel level.

Abstract: An improved pressure activated control apparatus is provided for sensing fluid pressure and triggering one or more switches in response to the fluid pressure, as desired. The apparatus is designed to be placed within a fluid of a reservoir. The apparatus includes a first resilient member, such as a pliable rolling diaphragm or bellofram, having an outer surface exposed to the fluid and responsive to the fluid pressure. The pressure activated control apparatus includes a second resilient member, such as a spring with a chosen spring constant, k, that provides a biasing force against the diaphragm that is opposite the fluid pressure. A transducer is operative to monitor changes in pressure of gases within the apparatus causes by movement of the diaphragm. A controller is responsive to the transducer and selectable fluid level thresholds to activate pumps and/or valves for adjusting the level of the fluid in the reservoir.

Abstract: In a feed device with a filling-level sensor fastened to a wall of a baffle, the filling-level sensor has a lever wire for holding a float. A carrier for mounting the filling-level sensor to a wall of the baffle is connectable to the wall in at least two different orientations. The pivoting range of the float is set by the selected orientation of the carrier on the wall. The feed device is consequently suitable for use in differently constructed fuel tanks.

Abstract: A liquid level measuring apparatus is provided, which includes an input circuit configured to receive electrical signals from level sensors configured to provide an electrical signal proportional to a liquid level in a tank portion. The input circuit provides a single output signal proportional to the combined liquid level in one or more liquid storage vessel portions. The apparatus may further include or be connected to a transmitter such as a wireless transmitting device.

Abstract: A liquid level detection device (10), particularly for submersed pumps, characterized in that it comprises means (13, 14) for detecting variation of electric and/or magnetic field in relation to the variation of the level of the liquid; the means are associated with a controller (16) for switching on and off a submersed pump (12).

Abstract: A redundant level measuring system comprises a chamber for fluidic coupling to a process vessel whereby material level in the vessel equalizes with material level in the chamber. A float including a magnet in the chamber rises and falls with material level in the chamber. A magnet actuated visual indicator is mounted to the chamber for indicating level of the magnet in the chamber. A measurement instrument includes a probe and a measurement circuit. The instrument is mounted atop the chamber with the probe extending downwardly into the chamber. The measurement circuit measures a characteristic of the probe representing level of the material in the chamber. A shield in the chamber isolate the float from the probe.

Abstract: Filling level indicators for washer fluid containers in motor vehicles have hitherto been arranged directly on the washer fluid container or been integrated in the instrument cluster on the motor vehicle. Despite the available information, the filling of the container when the level is too low is often delayed. A filling level indicator more effectively indicates the filling level by arranging the filling level indicator in the region of the tank filler neck, whereby the filling level in the washer fluid container is only indicated to the driver when he has in any case interrupted his journey in order to fill up with fuel and is free from other activities, so that it is virtually impossible for him to be distracted.

Abstract: A liquid level measuring device for measuring the level of liquid in a storage or dispensing tank has an elongated tubular hollow body that carries a threaded coupler adapted for engaging a threaded nipple on top of the tank. A buoyant float is attached to a lower portion of the elongated body. The body slides in relation to the coupler while the coupler remains stationary in relation to the tank. As the liquid is dispensed from the tank, the buoyant float that was positioned on the surface of the liquid in the tank, lowers in relation to the tank, moving the elongated body into the tank. Measuring indicia placed en the exterior surface of the elongated body allows visual observation of the changing level of liquid in the tank.

Abstract: In a slide detector, a contact member provided on a slider is made of gold or a gold alloy including an abrasion resistant metallic component, and a plurality of electrodes provided on an electric insulating board is made of a silver alloy including glass. Preferably, the contact member sliding on the electrodes is made of a gold alloy consisting of 99% by weight of gold and 1% by weight of cobalt, so that an anti-sulfurization and an abrasion resistance between the contact member and the electrodes is ensured. However, the weight percent of gold and other alloys may vary depending upon the abrasion characteristics desired.

Abstract: A liquid level indicator for an oil-filled transformer, power choke or tap changer in which a sensor part has a float which rises and falls with the oil level and rotates a sensor shaft and the sensor shaft is coupled to an indicator shaft on which a pointer is provided to cooperate with a dial. The gauge also includes a contactless angle encoder operating with a magnetic hub and coupled to the indicator shaft for outputting a signal representing the oil level.