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| Number | Title | Issue Date |
| 8091442 | Positive tube retention arrangement A measuring head has a base and extending spaced apart vertical sidewalls that form a slot into which a tube through which a fluid flows is placed and at least one sensor element mounted in at least one of the sidewalls to detect a characteristic of the flowing flui... | 01/10/2012 |
| 8061196 | Bottom up contact type ultrasonic continuous level sensor An ultrasonic sensor for measuring the level of liquid in a vessel has an elongated tubular probe, a tube within the probe, and a transducer that converts electrical energy to ultrasonic energy mounted at or near one end of the tube so as to transmit ultrasonic ener... | 11/22/2011 |
| 7997149 | Apparatus and method for non-invasive measurement of the sound velocity of a fluid flowing in a tubing A method and apparatus for measuring the sound velocity of a flowing fluid includes a cartridge having a hollow interior through which the fluid flows formed by first and second chambers of different diameters that define first and second walls extending toward the ... | 08/16/2011 |
| 7908931 | Non invasive flow rate measuring system and method A system and method for measuring the flow rate of a liquid in a tube non-invasively has a heating element that generates energy that is applied to the liquid to produce a heat marker that is detected by a temperature sensor located at a known distance from the heat... | 03/22/2011 |
| 7694560 | Non-invasive bottom up continuous liquid level transmitter Apparatus for measuring the level of liquid in a container has a substrate on which a plurality of piezoelectric elements are mounted that are to transmit ultrasonic energy upwardly through the bottom of a container placed on and supported by the substrate into the ... | 04/13/2010 |
| 7694570 | Non-invasive dry coupled disposable/reusable ultrasonic sensor A non-invasive dry coupled disposable/reusable ultrasonic sensor has a housing and a piezoelectric element at one end of the housing to which connected signal leads are connected that extend out from the housing. A piece of double-sided adhesive tape has one adhesiv... | 04/13/2010 |
| 7661294 | Non-invasive multi-function sensor system An integrated multi-function sensor system has a head having a slot to accept a tube of a deformable material and a plurality of sensor elements mounted in the walls of the head slot to confront a tube in the slot, each sensor element being for affecting sensing of ... | 02/16/2010 |
| 7661293 | Ultrasonic system for detecting and quantifying of air bubbles/particles in a flowing liquid A system using ultrasonic energy for detecting and quantifying air bubbles and/or particles in a liquid flowing in a tube by a non-invasive and non-destructive technique has an ultrasonic sensor having piezoelectric transmitter and receiver elements placed opposing ... | 02/16/2010 |
| 7617739 | Non-invasive ultrasonic system to determine internal pressure in flexible tubing A system for determining pressure change in a liquid flowing in a tube of an elastic material has a sensor head having a slot and a pair of piezoelectric elements mounted in opposing walls of said slot between which the tube is placed in contact with the opposing el... | 11/17/2009 |
| 6832516 | Integral ultrasonic liquid level continuous transmitter with independent high-level discrete alarm point level An ultrasonic liquid level sensor instrument that combines a continuous transmitter that transmits though the air for measuring the level of liquid in a vessel on a continuous basis and a point level sensor that sets a high level alarm. The continuous level transmit... | 12/21/2004 |
| 6781287 | Non-contacting ultrasonic transducer An ultrasonic transducer for sensing liquid within an article, such as a vassel or pipe, without contacting the liquid has a body, a sealed capsule of a flexible material containing a liquid capable of transmitting ultrasonic energy carried by the body from which a ... | 08/24/2004 |
| 6631639 | System and method of non-invasive discreet, continuous and multi-point level liquid sensing using flexural waves A non-invasive system and method for measuring liquid level in a vessel utilizes a pair of ultrasonic transducers mounted spaced apart externally on the vessel wall. One of the transducers excites a single pulse of sonic energy that produces a flexural, o... | 10/14/2003 |
| 5880364 | Non-contact ultrasonic micromeasurement system A non-contact ultrasonic system for measuring the volume of liquid in a container in which an ultrasonic sensor is disposed opposite the top of the container. A circuit provides pulses of ultrasonic energy for transmission through the air to the air-liqui... | 03/09/1999 |
| 5808200 | Ultrasonic sensor with continous and demand self-test for liquid and dry product level measurement An ultrasonic sensor having a support structure of first and second walls with a gap of fixed distance therebetween. A piezoelectric element for transmitting and receiving ultrasonic energy is bonded to the inner face of one of the walls and the energy tr... | 09/15/1998 |
| 5757876 | Object counter and identification system A system for counting the number of objects of known thickness in a stack and identifying the objects by their color in which an ultrasonic sensor is mounted at a known distance from a reference point that defines the beginning of the stack. The ultrasoni... | 05/26/1998 |
| 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 piezoelectric element at its inner face. The body houses a cir... | 04/07/1998 |
| 5663503 | Invasive and non-invasive ultrasonic sensor with continuous and demand self-test An ultrasonic sensor of either the invasive or non-invasive type having a piezoelectric element for transmitting and receiving ultrasonic energy bonded by an adhesive to the inner face of the wall of a support. When operated in an energy transmitting mode... | 09/02/1997 |
| 5507178 | Liquid presence and identification sensor A sensor for determining both the presence of a liquid in a container or conduit, and identifying its type has a sensor housing body containing both a pair of piezoelectric elements used as the transmitter and receiver of ultrasonic waves directed across ... | 04/16/1996 |
