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7466147 |
Fluid quality sensor
A fluid quality sensor includes a first electrode ( 24 ) that has a fluid passageway ( 22 ) that is adapted to be placed in line with at least one fluid conduit ( 30 ). A second electrode ( 40 ) is...
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7392444 |
Non-volatile memory evaluating method and non-volatile memory
The present method generates a greater number of hot holes than those generated by normal write/erase operations, thereby making it possible to evaluate an operation of a non-volatile memory with...
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7304484 |
Method and device for the temperature compensation of a measuring bridge
A method for the temperature compensation of a resistance measuring bridge, such as in particular a Wheatstone bridge, is characterized in that a capacitor positioned between the input circuit and...
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7267002 |
Capacitance type physical quantity detector
A capacitance type physical quantity detector includes a sensor unit of which the capacitance varies depending upon a change in the physical quantity and a C-V converter unit which converts a...
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7176700 |
Moisture sensor device and self-diagnosing method therefor
A moisture sensor device includes a sensor portion having a capacitance that is varied in accordance with surrounding humidity, a signal processor for processing a detection signal of the sensor...
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7100455 |
System and method for pressure measurement
A system and method for pressure measurement may include the ability to readily produce a pressure measurement system. In one general aspect, pressure measurement may include a signal-converting...
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6809528 |
Method and apparatus for measuring water content
A method and apparatus for measuring the water content of a liquid, including a method step for electrically measuring the property of the liquid for one parameter. The properties of the liquid are...
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6750664 |
Apparatus for managing an intergrated circuit
An apparatus for an integrated circuit comprising a thermal sensor ( 41-44 ), an A-D converter ( 58 ) coupled to the thermal sensor, wherein the thermal sensor provides an input to the A-D...
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6690180 |
Process and apparatus for determining ratio of fluid components such as methanol and water for reforming feed
A method and sensor for determining the ratio of two components in a fluid mixture comprising a test cell in open communication with the fluid mixture and a reference cell containing a desired...
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6570395 |
Portable grain moisture meter
A portable grain moisture measurement device has an automatic grain moisture measurement actuation system whenever the compaction of the grain within a test cell of the device is at a preset value...
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6501287 |
Apparatus and method for measuring thickness
Apparatus are provided for measuring coating thickness. The apparatus include first and second inductors, which may be coils, and measuring the impedance of conductors by passing alternating...
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6313645 |
Method of determining the volumetric proportion of liquid water and the density of snow and a device for carrying out the method
In a method and apparatus for determining the volumetric proportion of water in snow and the density of snow, a probe consisting of at least three parallel, but differently spaced, electrical...
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6035004 |
Digital radio receiver
An inexpensive, compact digital radio receiver corrects IQ imbalance, non-orthogonal I and Q phases, and DC offset by a DSP. The digital radio receiver is equipped with an antenna, an RF/IF...
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5764065 |
Remote contamination sensing device for determining contamination on insulation of power lines and substations
A remote contamination sensing device for contamination on insulation of electric power lines and substations includes a data logger and a supporting structure to which a sensing capacitor with at...
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5663650 |
Portable grain moisture meter
A portable grain moisture meter has a large 16 character digital display allowing an alphabetical list of grain selections to be selectably displayed in full text format and subsequently tested for...
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5296819 |
Polymer capacitative moisture sensitive device comprising heating means
A moisture sensitive device includes a polymer capacitive moisture sensitive element and a heater. The polymer capacitive moisture sensitive element is formed by sequentially stacking a lower...
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5012196 |
Capacitance sensor arrangement
A capacitance sensor arrangement is used to determine the distance of an element such as a shearing handpiece from a surface such as the skin of a sheep. The arrangement processes data from one or...
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4952882 |
Capacitance sensor assembly
A capacitance sensor for measuring changes in thickness of a dielectric film, such as plastic film, passed through the sensor, having an upper and lower housing projecting from a back plate, the...
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4855667 |
Parallel plate dielectric analyzer
A parallel plate dielectric analyzer is disclosed including: a distance sensor for accurately measuring the varying distance between the electrodes, such as a linear voltage differential...
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4849687 |
Steam quality monitoring means and method
A steam quality monitor monitoring the quality of steam flowing in the pipe includes capacitance sensing apparatus which senses the capacitance of the flowing steam and provides a capacitance...
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4806847 |
Dielectric liquid level sensor and method
A sensor for sensing the level of oil or transmission fluid under both normal and extreme temperature conditions. The only active components of the sensor have input and leakage currents...
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4801863 |
Apparatus for monitoring the mixing relationship of two liquids
Apparatus for enabling continuous monitoring of a mixture ratio of two different liquids as well as to limit it to those mixture amounts which are drawn off at a particular time for the purpose of...
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4766369 |
Ice detector
An ice detector 11 is provided for the determination of the thickness of ice 22 on the outer surface 12 on an object (e.g., aircraft 10) independently of temperature or the composition of the ice...
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4748400 |
Method for controlling the amount of moisture associated with a web of moving material
A moisture measurement and control system controlling the amount of moisture in paper being manufactured by papermaking machinery, for example, linerboard, utilizes a standard scanning moisture...
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4621228 |
Electric moisture meter
A voltage signal associated with the moisture content of a sample in grain or sand form is converted into a digital signal value by an analog-to-digital converter. A programmable read-only memory...
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4584522 |
Digital direct reading grain moisture tester
A direct measuring digital grain moisture meter comprises a light weight power supply, an oscillator, a two plate capacitor having a receptacle admitting a grain sample acting as the capacitor...
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4580233 |
Method of measuring moisture content of dielectric materials
The present invention is a method for measurement of moisture in dielectric materials. It is particularly useful for lumber. In the preferred version, at least two alternating current signals whose...
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4468609 |
Control system for the detection of leaks in insulated pipes
A control system for the detection of leaks in insulation-jacketed pipes having measuring probes, each with two electrodes, arranged at sectional intervals and connected to an evaluation circuit....
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4468610 |
Radio frequency apparatus for measuring moisture content of materials as a function of dielectric constant
Apparatus for measuring moisture content of gypsum board and like products as a function of dielectric constant comprising an rf signal source, an antenna disposed for rf field coupling to a test...
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4462250 |
Grain moisture meter
A grain moisture meter and/or a meter for measuring grain bin temperatures, comprises a half-wave pulse oscillator with pulses connecting to the outer shell of a grain container. Pulses pass...
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4399404 |
Moisture tester with probe
The tester has a probe to be inserted into granular or fluid materials for measuring instantly permittivity and temperature. The characteristics of materials are measured according to permittivity,...
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4287470 |
Digital humidimeter
This invention relates generally to an apparatus for measuring capacitance and resistance and more particularly to a digital humidimeter, which can be used for determining the moisture content of...
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4282480 |
Apparatus for humidity detection
Apparatus for humidity detection comprises a humidity sensing element, the electrostatic capacitance of which varies in accordance with the ambient humidity, a fixed capacitor, first and second...
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4272718 |
Moisture meter
A moisture meter of an electrostatic type includes resonance circuits, a measuring electrode connected in parallel with the resonance circuits for measuring the capacitance of a sample, and a...
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4181881 |
Electrical impedance measuring apparatus for providing separate measurements of the conductivity and dielectric coefficient of various materials
An oscillator provides an output signal, of frequency f 0 , whose phase is shifted by substantially 45° to obtain a test signal which is coupled by a first cable to a bridge circuit located in...
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4174498 |
Apparatus and method for providing separate conductivity, dielectric coefficient, and moisture measurements of particulate material
A bridge circuit, interconnected with a sample box containing a sample of particulate material, is energized by a test signal and provides a bridge output signal whose phase, relative to the phase...
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4107599 |
Electrode for an impedance measuring apparatus
An electrode, forming a part of an apparatus for measuring the electrical impedance of a variety of sampled materials for the purpose of determining moisture content, is composed of a pair of...
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4058766 |
Multiple-frequency permittivity tester
As in prior testers, a capacitive cell in which material is placed to be tested is connected in a voltage divider circuit. However, signal generating means connected to the voltage divider applies...
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3992665 |
Electrical impedance measuring apparatus
Apparatus for measuring the electrical impedance of a variety of materials including an electrode arrangement providing sample data to an impedance bridge, a frequency generator providing a test...
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3824461 |
ELECTRICAL IMPEDANCE MEASURING APPARATUS
Apparatus for measuring the electrical impedance of a variety of materials including an electrode arrangement providing sample data to an impedance bridge, a frequency generator providing a test...
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3794911 |
WEIGHT RESPONSIVE MOISTURE TESTER HAVING TIME DELAY MEANS AND TEMPERATURE COMPENSATION
A grain sample moisture tester comprises a reference oscillator and a variable oscillator, the latter having a capacitor across its tank circuit that constitutes a test cell such that the...
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3781671 |
IMPEDANCE MEASURING BRIDGE CIRCUIT
Apparatus for measuring the electrical impedance of a variety of materials including an electrode arrangement providing sample data to an impedance bridge, a frequency generator providing a test...
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3781673 |
PACKING ADAPTER FOR TESTING MOIST CHOPPED MATERIALS IN A GRAIN MOISTURE TESTER
An insulating, frustum-shaped adapter is disposed around the inner cylindrical electrode of a grain moisture tester to provide a desirable, repetitive amount of packing of moist, chopped material...
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3761810 |
DIGITAL READING MOISTURE TESTER
A digital reading grain moisture tester is disclosed in which the frequency of an LC oscillator having as one element a capacitive cell containing a measured weight of the material under test is...
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3760267 |
MOISTURE TESTER FOR CONTINUALLY FLOWING GRANULAR MATERIALS
A moisture tester of the type having outer and inner cylindrical electrodes and means for measuring permittivity has an upper extension connected to receive by gravity samples of material from a...
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3743930 |
MOISTURE TESTER HAVING TEMPERATURE CONTROLLED VARIABLE TIME DELAY CIRCUIT
A time delay circuit for use with a grain moisture tester is disclosed including a differentiating circuit operative to delay the taking of a reading until the time rate of change of the output of...
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3739264 |
GRAIN MOISTURE TESTER
To provide a lightweight, portable tester, the bottom of an upper cylindrical aluminum container that is the housing for a test cell fits tightly into a lower cylindrical aluminum container that is...
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3723865 |
ON-LINE ELECTRONIC MOISTURE ANALYSIS SYSTEM
A moisture analysis system is provided to analyze and determine the moisture content of uniformly baked goods according to predetermined standards. The dielectric properties of the goods are tested...
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3691457 |
MOISTURE MEASUREMENT OF GRAIN
Apparatus for the measurement of moisture in grain and other material. It weighs the sample as added, to ensure a constant sample weight; it dumps the sample in a predictable manner into a...
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3681685 |
CAPACITIVE MOISTURE MEASUREMENT
This application discloses apparatus for the measurement of moisture in grain and other materials. It weighs the sample as added, to ensure a constant sample weight; it dumps the sample in a...
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