Rochester Gauges, Inc.

Texas Lfp, LLC

Other

Rochester Sensors, LLC

Calisto Medical, Inc.

Gagik Farmanyan

Herbert G Ross, Jr

Chester Wildey

Jorge Manuel Prieto

Carl A Taylor

Robert E Hrncir

Vahram Mouradian

Minas Hambardzumyan

Maksim Malkin

Valeri Armenakyan

Chester Roy Wildey

A time domain reflectometer (TDR) transducer () for determining a level () of liquid () in a container () includes a first electrode () and a second electrode portion () with a measuring volume () therebetween for receiving material () to be measured. The second electrode portion () has a shielded electrode section (A) isolated from the first electrode () and an unshielded electrode section (B), such that an energy pulse propagates along the shielded electrode section (A) without signal loss, and boomerangs along a second opposite direction across the first conductive electrode portion (), the measuring volume () and the unshielded electrode section (B) where partial reflection of the pulse occurs at least at the interface () of the material () to create a return echo that travels in reverse direction, boomeranging back through the shielded electrode section (A) for analysis by an electronic assembly ().

TDR transducer with boomerang waveguide

A Time Domain Return measurement system for measuring liquid level, linear movement or other measurements which includes a first and second electrode, the second electrode spaced from the first electrode to define a gap, and an electronics assembly connected to the first and second electrodes equipped with a generator for transmitting an electromagnetic signal for propagation along the electrodes. The signal generator has a first analog timing circuit for actuating a slow-rising function of voltage versus time, a second analog timing circuit associated with the first analog timing circuit for actuating a fast-rising function of voltage versus time, and a receive circuit electrically connected to the electrodes, the receive circuit being activated for receiving return echo data associated with the electromagnetic signal transmitted when the fast-rising function is equal or greater than the slow-rising function to determine the position of the second medium with respect to the electrodes.

Low-cost measurement system using time domain reflectometry

A liquid level transducer includes a mounting head connectable to a tank, a probe assembly extending into the tank, and a hose connecting assembly positioned on the mounting head outside of the tank. The probe assembly can include liquid withdrawal and return tubes and a sensor tube for determining the level of liquid within the tank. Bores are formed in the mounting head in alignment with the liquid withdrawal, return, and sensor tubes. First retaining features at least partially surround the withdrawal/return bores. The hose connecting assembly includes hose connectors with bases that have second retaining features that cooperate with the first retaining features so that the hose connectors can be aligned with the bores and adjusted to different angular positions about the central axes of the bores during assembly.

Universal mounting head construction for liquid level transducers and the like

A liquid level transducer includes a mounting head for connection to the wall of a tank and a housing extending into the tank from the mounting head. A float rod is pivotally connected to the housing and a float is connected to the float rod for pivotal movement upon a change of liquid level in the tank. A proximal end of the float rod is connected to an actuator portion and constrained for pivotal movement about two parallel axes so that the actuator portion moves in a linear direction with respect to the housing. The interior of the housing includes a sensor assembly responsive to the linear movement of the actuator portion to thereby determine the level of liquid within the tank.

Liquid level transducer with pivoting and linear motion

A liquid level transducer for a tank, such as a railroad tank car or the like, includes a mounting head connected to the tank and a sensor assembly extending into the tank from the mounting head. The sensor assembly includes a sensor tube located in the tank and a gauging rod assembly positioned in the sensor tube. The gauging rod assembly can be pulled out of the tank until it magnetically couples with a magnetic float that surrounds the sensor tube. The float moves in response to a change in liquid level and the magnetic coupling provides the user with a visual indication of the liquid level. A sensor board extends along a length of the gauging rod assembly and is responsive to movement of the float for electronically determining the liquid level without the need to magnetically couple the gauging rod assembly to the float.

Dual measurement liquid level transducer

A transducer for determining the level of liquid within a container includes a mounting head adapted for connection to the container and a sensor assembly adapted to extend into the container. A housing of the sensor assembly has a hollow interior that is isolated from liquid within the container. A plurality of sensor elements are located within the interior. A float rod is pivotally connected to the housing and a float is connected to a distal end of the float rod. An actuator located outside the housing is operatively associated with the float rod for pivotal movement therewith. The actuator is operative to change an electrical state of at least one of the sensor elements to thereby indicate a level condition of the liquid within the container. A snap-fit assembly of the mounting head and sensor assembly is also disclosed.

Liquid level transducer with isolated sensors

A method of determining level of a liquid between empty and full conditions within a container includes: providing first and second elongate capacitors, each capacitor being independently capable of measuring the liquid level at least between the empty and full conditions within the container, with the second capacitor being longer than the first capacitor; determining first and second capacitance values for the first and second capacitors, respectively, based on the liquid level height; and dividing the first capacitance value by a difference between the second and first capacitance values to thereby obtain a liquid level value independent of the dielectric constant.

Self-calibrating capacitive liquid level sensor assembly and method

A transducer for determining the level of liquid within a container includes a mounting head adapted for connection to the container and a sensor assembly adapted to extend into the container from the mounting head. The sensor assembly includes a housing having an upper portion connected to the mounting head and a lower portion that extends from the upper portion. The lower portion has a hollow interior that is isolated from liquid within the container. A plurality of sensor elements are located within the hollow interior. A float rod is pivotally connected to the housing and a float is connected to a distal end of the float rod to thereby cause pivoting movement of the float rod in response to a change in liquid level within the container. An actuator is located outside of the housing and is operatively associated with the float rod for pivotal movement therewith. The actuator is operative to change an electrical state of at least one of the sensor elements to thereby indicate a level condition of the liquid within the container.

Liquid level gauge

A capacitive sensor assembly for measuring a level of fluent material in a container includes an electronics section for receiving and processing signals and an antenna probe operably associated with the electronics section. The antenna probe has an electrical conductor and an insulating layer that covers at least a portion of the electrical conductor. The electrical conductor is connected to the electronics section. An enlarged measurement portion is in turn connected to the electrical conductor for detecting the presence or absence of the fluent material. The enlarged measurement portion has a surface area that is larger than a surface area of the electrical conductor over an equivalent height or length to function as a first plate of the capacitive sensor assembly, with the fluent material to be measured functioning as a second capacitive plate. In this manner, a change in detected capacitance of the antenna probe is reflective of a level condition of the fluent material.

Capacitive sensor assembly for determining level of fluent materials

Disclosed are systems and methods of determining the amount of a substance in a living organism. In one embodiment, the method comprises: applying an electrical signature signal to the living organism, wherein the electrical signature signal corresponds to a predetermined amount of the substance; measuring the response of the living organism to the applied signature signal; and determining whether an elevated response has resulted from applying the electrical signature signal, if so, then determining the amount of the substance in the living organism from the predetermined amount of the substance.

Growing community of inventors

Plano, TX, United States of America

Gagik Farmanyan