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5866815 |
Fill-level indicator
Proposed is a fill-level indicator designed to indicate the level of the contents of a container or the storage level of a material at a storage place, the indicator having an ultrasonic transducer...
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5862431 |
Toner powder level sensing using element and pulse signal and toner powder presence sensing using piezoelectric film
A toner detecting system includes an image forming apparatus having a toner reservoir. A toner sensor of the system has a toner sensing element of piezoelectric material, the toner sensor carried...
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5856953 |
Processing echoes in ultrasonic liquid gauging systems
Method for processing echoes received in an ultrasonic liquid gauging apparatus includes the steps of transmitting at time t 1 ultrasonic energy from an ultrasonic transducer toward a fixed target...
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5842374 |
Measuring method of a wide range level and an apparatus thereof
A method for measuring the water level of a reservoir, a larger river and an underground water and an apparatus thereof comprises a waveguide tube selected in a predetermined length, on the upper...
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5841028 |
Automated liquid-level vessel apparatus
The invention relates to a vessel apparatus for holding and transferring liquids, in which the level of liquid may be controlled and monitored automatically. A depth sensing device, included in the...
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5836192 |
Device for monitoring a predetermined level of a liquid in a container
For monitoring a predetermined level of a liquid in a container an ultrasonic transducer is fitted on the outer surface of the container wall at a measurement point situated at the height of the...
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5819818 |
Fuel spillage control device and method for using same
A fuel spillage control device and method for using same for qualitatively determining the liquid level inside a fuel tank as it is being filled. The fuel spillage control device includes a...
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5821743 |
Magnetostrictive waveguide position measurement apparatus with piezoceramic element
A magnetostrictive waveguide position measuring apparatus includes a waveguide extending between opposed anchored ends. A magnet is displaceable along the waveguide and generates torsional strain...
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5815079 |
Device for establishing and/or monitoring a predetermined filling level in a container
A description is given of a sturdy device for establishing and/or monitoring a predetermined filling level in a container, which device exhibits a housing (1), two oscillating rods (3, 4)...
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5799534 |
Procedure for measuring the level of a liquid in a tank according to the radar principle
A process for measuring the level of a liquid in a tank according to the radar principle, using a voltage-controlled oscillator determining the radar frequency, and a voltage source controlling the...
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5778726 |
Device for monitoring a predetermined level of a liquid in a container
For monitoring a predetermined level of a liquid in a container an ultrasonic sensor is fitted on the outer surface of the container wall at a measurement point situated at the height of the level...
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5773913 |
Piezoelectric sensors
A piezoelectric sensor probe comprises an elongate insulative support member supporting a plurality of piezoelectric sensing elements spaced along the length of the member, the support member has...
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5768939 |
Method and apparatus for acoustic level measurements
An acoustic ranging system monitors the level of material inside one or more vessels. The system includes an ultrasound transducer mounted in each vessel that is connected to a transmitter and a...
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5761955 |
Removable ultrasonic transducer with integral electrical disconnect
An externally mounted transducer assembly for an ultrasonic liquid level measuring device that utilizes a piezoelectric crystal for generating ultrasonic pulses to be transmitted through a tank or...
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5743134 |
Method and arrangement for determining and/or monitoring a predetermined level of material in a container
The determining and/or monitoring of a predetermined level of material in a container is implemented with the help of a level sensor having a mechanical oscillatory structure, an electromechanical...
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5737963 |
Ultrasonic transducer
A small, compact, easily mountable ultrasonic transducer for measuring the filling level in a container is provided, which transducer transmits virtually no oscillation energy to the container,...
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5735166 |
Ultrasonic micro-sensor for level leak alert and interface detector
An ultrasonic sensor for detecting the presence of a liquid having an elongated body of plastic material with spaced arms at one end defining an air gap between the arms with each arm having a...
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5736855 |
Local buffer circuit for sonic waveguides
A local buffer circuit for use with a magnetostrictive transducer is disclosed wherein the magnetostrictive transducer includes a pickup coil and the local buffer circuit includes two diodes in...
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5734346 |
Method of an apparatus for detecting the displacement of a target
A method of detecting the displacement of a target in a given environment includes storing reference data having data representative of the environment; transmitting a transmit signal towards the...
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5717383 |
Device for determining and/or monitoring a predetermined level of contents in a container
The device for determining and/or monitoring a predetermined level of contents in a container comprises a sensor, which is so mounted on the container at the level of contents to be monitored that...
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5715890 |
Determing fluid levels in wells with flow induced pressure pulses
An acoustic method is disclosed for measuring fluid level in producing wells and other inaccessible cavities. The method uses flow induced pressure phenomena to locate the fluid level. Simplified...
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5703289 |
Microwave transmitter housing
An improved housing assembly is used for a microwave level sensing instrument for sensing level of a process fluid in a vessel. The process vessel includes a vessel flange defining an opening into...
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5697248 |
Liquid level sensor
The level of a liquid is detected by an ultrasonic arrangement comprising a transmitter and a receiver. The transmitter has a vertical array of transmitter segments which transmit sequentially,...
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5693881 |
Sensor-based liquid leveling system for structures
A level measuring system for leveling structures using the principal that water seeks its own level. A plurality of sensor vessels each of which includes ultrasonic transducers for measuring the...
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5689288 |
Ink level sensor
A flexible bar connected to an actuator is suspended within an ink reservoir. The bar is preferably mounted in a cantilever or free-standing mode and vibrates in response to signals from the...
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5680041 |
Magnetostrictive position measurement apparatus with anti-reflection waveguide terminals
A magnetostrictive waveguide type position measuring system wherein the wire waveguide is mounted within a small diameter brass tube which, in turn, is mounted by way of resilient suspension...
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5670710 |
Fluid quantity gauging systems
An ultrasonic fuel gauging system has several ultrasonic transducers mounted on the bottom of a tank, the transducers being unconstrained by any tube or still well so that they each propagate...
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5656774 |
Apparatus and method for sensing fluid level
A method and apparatus (10) for sensing a surface level (24) of fluid (12) in a tank (14) having an electrically conducting pickup tube (20) extending through a wall (16) of the tank (14) and into...
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5651285 |
Liquid level sensor having a plunger core
The liquid level sensor comprises a graduated tape or cable whose free end is fixed to a plunger core that includes a housing and a probe for detecting the presence of a liquid. The probe comprises...
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5651286 |
Microprocessor based apparatus and method for sensing fluid level
A method and apparatus (10) for sensing a surface level (24) of fluid (12) in a tank (14) having an electrically conducting pickup tube (20) extending through a wall (16) of the tank (14) and into...
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5644299 |
Ultrasonic material level measurement
Apparatus for indicating material level that includes a pair of ultrasonic transducers on opposed sides of a space for receiving the material at the level to be detected. A swept frequency...
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5631633 |
Device for determining and/or monitoring a predetermined material level in a container
The determination and/or monitoring of a predetermined material level in a container is effected with the help of a material level sensor which contains a mechanical oscillatory structure, an...
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5625343 |
Device for determining and/or monitoring a predetermined filling level
In devices for determining and/or monitoring a predetermined level with a sensor that is excited to perform mechanical oscillations at its self-resonant frequency by means of an electronic...
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5617757 |
Liquid level monitoring systems for underground storage tanks and method for its installation
A liquid level monitoring system for underground storage tanks includes a submersible monitoring pipe system having telescoping sections that are biased to an extended position enabling the pipe to...
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5614831 |
Method and apparatus for level gauging using radar in floating roof tanks
A device for gauging the level of a fluid in a container includes a floating roof, a transmitter for feeding a first microwave signal downwards in the direction of a fluid surface of the fluid, and...
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5611239 |
Microwave point instrument with self-test circuit
A microwave point level instrument is adapted to detect level or change of products in a storage vessel. The instrument includes a microwave transducer periodically developing a pulse of microwave...
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5610611 |
High accuracy electronic material level sensor
The High Accuracy Electronic Material Level Sensor (electronic dipstick) is a sensor based on time domain reflectometry (TDR) of very short electrical pulses. Pulses are propagated along a...
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5609059 |
Electronic multi-purpose material level sensor
The present electronic multi-purpose material level sensor is based on time domain reflectometry (TDR) of very short electrical pulses. Pulses are propagated along a transmission line that is...
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5600997 |
Carrier frequency sensing of fluids in vessels
A carrier frequency based system employs a capacitive probe which is located at a predetermined desired fluid detection level in a fluid containing vessel. The probe forms one plate of a capacitor...
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5595088 |
Liquid level monitoring system for underground storage tanks and method for its installation
A liquid level monitoring system for underground storage tanks includes a submersible monitoring pipe having telescoping sections that are spring biased to an extended position enabling the pipe to...
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5594352 |
Fuel tank transducer module circuit
A circuit for use with an ultrasonic transducer utilized to measure depths of liquids in tanks is described.
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5586085 |
Container and adaptor for use with fluid volume sensor
A container having affixed thereto an ultrasonic transducer, including a connection for electrically linking the transducer to electronic circuitry located outside the container. Flexible and...
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5578994 |
Liquid level switch
A piezoelectric liquid level switch is provided which can be made immune to standing wave effects and provides an unequivocal response to liquid contact. The switch incorporates an electrical...
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5568449 |
Methods and apparatus for use in ultrasonic ranging
An ultrasonic probe utilized in an ultrasonic ranging system for determining fluid volume and/or fluid leakage in an underground storage tank, as well as monitoring fluid inventory, is provided...
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5531111 |
Structure of a volumetric measuring apparatus
A volumetric measurement apparatus is provided which measures the volume of a liquid material stored within a container. The volumetric measurement apparatus includes a reference enclosure having...
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5524486 |
Device for measuring, controlling and/or detecting the filling level in a container
A fill level indicating device of the rod-in-tube type has a pair of propping struts gusseting the vibratory tube to the membrane and to the membrane support. One strut is arranged above the...
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5507181 |
Non-intrusive mounting system and method for microwave instruments
A non-intrusive mounting system and method for coupling microwave instruments to a container flange having an opening into a container. The mounting system includes a microwave transparent window...
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5483226 |
Ultrasonic detector, detection method for liquid media and ultrasonic transmitter control method
The ultrasonic transmitter (E) is subjected to two different excitation modes, and is mounted on the support (2) which at the same constitutes a waveguide. Excitation of the transmitter at its...
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5471872 |
Acoustic liquid level measuring apparatus
An acoustic liquid level detector system includes, a) a first acoustic wave guide; b) an acoustic wave transmitter and an acoustic wave receiver operably associated with the first acoustic wave...
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5457990 |
Method and apparatus for determining a fluid level in the vicinity of a transmission line
A method and apparatus for detecting fluid level in a tank in the vicinity of a transmission line (1), the fluid level being such as to cause reflection of a signal transmitted along the...
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