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7359804 |
System and method for calibrating remote emissions sensing instruments
A system and method is provided for obtaining calibration curves for CO and CO 2 during laboratory calibration of one or more remote emissions sensing (RES) instruments, and for self-calibration...
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7187178 |
Method for determining the voltage sensitivity of the distance between the mirrors of a fabry-perot interferometer
A method for determining the voltage sensitivity of the distance between the mirrors of a Fabry-Perot interferometer in a measuring device, which is intended to measure a predefined gas (CO2), of...
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7167098 |
Testing equipment for a fire alarm
The present invention relates to testing equipment 20 for a fire alarm 1. It includes a testing pole ( 21 ), a range spacer ( 23 ) connected to the testing pole ( 21 ), and a reflective means...
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7062954 |
Leak detector
A leak detector comprises a high vacuum envelope connected with a vacuum pump to bring the vacuum envelope to a pressure sensibly lower than ambient pressure. At least a portion of the envelope is...
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7043958 |
Gas analyzer automated purge/zero process
An apparatus and method for purging and zeroing an analyzer. At times, for good analysis of a gas sample or taking a live reading, the analyzer needs to be zero out and/or purge of contaminants....
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6964187 |
Vacuum sensor
An apparatus and method for measuring the vapor or gas content of a vacuum chamber ( 1 ) by a vapor sensor ( 21 ) located in the fore-line of a vacuum system is provide. The gas or vapor content is...
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6675629 |
Method of and instrument for analyzing a gas
An instrument provides a quantitative measurement of an analyte in a gas. It includes a detection cell that provides an indication of an amount of analyte present in the gas, and a valve having a...
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6568240 |
Method and apparatus using a gas concentration sensor for accurately controlling an air fuel ratio in an internal combustion engine
The present invention provides a method and apparatus using a gas concentration sensor for accurately controlling an air fuel ratio in an internal combustion engine, featuring in that before the...
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6330819 |
Method and apparatus for calibrating a dissolved oxygen analyzer
A method and an apparatus for calibrating a dissolved oxygen analyzer are disclosed. In the method, a zero point is first determined and set on the analyzer by filling into the analyzer a saturated...
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6279372 |
Method of correcting the characteristic curve of a linear lambda probe
In order to correct the characteristic of a linear lambda probe which is arranged in an emission control system of an internal combustion engine upstream of a catalytic converter, in an overrun...
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6205989 |
Control device for air-fuel radio sensor
A control device for an air-fuel ratio sensor for detecting, from an oxygen concentration detecting device, a current corresponding to a concentration of oxygen contained in a gas by applying a...
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6203502 |
Respiratory function monitor
A respiratory function monitoring device comprising a flow sensor and a conversion device is herein disclosed. Also disclosed are structures for carrying out an auto-zero calibration, a purging...
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6192310 |
Device and method for diagnosing the condition of a probe upstream from a catalytic converter
An apparatus and method for diagnosing the condition of a sensor in an internal combustion engine upstream from the catalytic converter. The diagnosis utilizes a signal from a second non-linear...
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6155096 |
Light transmission type powder and granular material measuring apparatus
A light transmission powder and granular material measuring apparatus for a continuous production line assembly is provided. A conduit line is capable of being connected to the production line to...
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5980834 |
Sample storage devices
A sample storage device comprises a vial provided with an opening, a permion tube arranged within the vial, permeable to a fluid contained in the vial or the permeation tube, and having a first...
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5942672 |
Automated particle monitor operation for a thin film process
A method of calibrating a particle monitor prior to applying DC power to a cathode in the processing chamber by first, initiating a flow of gas to the processing chamber. Next, the operation of the...
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5847261 |
Polarity discriminating method and signal processing circuit for a vapor sensor in a microwave oven
A polarity discriminating method and signal processing circuit for a vapor sensor in a microwave oven is disclosed. The control section operates a fan motor so as to discriminate the polarity of a...
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5804695 |
Gas dividing method and apparatus
A gas dividing and blending system including a gas divider for generating a mid-span gas for more than one analyzer at the same time so that the analyzers can run their mid-span checks at the same...
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5761952 |
Electrochemical gas sensor
An electrochemical gas sensor having a housing in which components of the sensor are mounted. A number of electrical connectors are secured to the housing and coupled to respective sensor...
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5753508 |
Method of testing a function of a detector at an inspection station and apparatus therefor
In a method of testing a function of at least one detector at an inspection station (S) for containers, particularly in an inspection unit (R) for multi-trip bottles, a test gas is fed from a...
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5659125 |
Automatic calibration method for carbon monoxide monitors
A method and apparatus to automatically calibrate a carbon monoxide detector placed in an environment having a known concentration of carbon monoxide. The monitor is placed in a calibration mode in...
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5597535 |
Apparatus for detecting mercury
Mercury Detection Method and Apparatus utilizes cartridges including gold for adsorbing mercury as an amalgam. The adsorbed mercury is desorbed by heating and passed through a Cold Vapour Atomic...
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5524472 |
Evaluating arrangement for the signal of an oxygen probe
The invention is directed to an evaluating arrangement 10 for the probe signal of a heated amperometric oxygen probe 11 which is mounted in the flow of the exhaust gas from an internal combustion...
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5522250 |
Aged exhaust gas oxygen sensor simulator
An aged exhaust gas oxygen sensor (EGO) simulator is inserted between an exhaust gas oxygen sensor and an electronic control module for testing the response of fuel control and emission systems to...
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5495744 |
Method of correcting componential concentration in expiration and expiration analyzer
A first sample measuring passage provided between a collection port and a suction pump has a sample gas measurer for measuring expiration components, while a second sample measuring passage which...
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5360743 |
Method for measuring a sample sorption and a sample cell void volume and wall adsorption using an adsorbate gas
A sorption analyzer for performing surface measurement analysis on sample material. The sorption analyzer calibrates the instrument and the sample cell using the adsorbate gas.
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5335534 |
Functional testing method for toxic gas sensors
The proper operation of an NDIR toxic gas sensor can be checked by using a non-toxic gas that has an absorption band that overlaps the absorption band used for measuring the toxic gas. The NDIR...
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5329804 |
Calibration system and method for calibrating a blood gas sensor
A calibration system and method for calibrating a medical sensor (16) that monitors chemical blood gases. A calibrator (12) is used in connection with a tray (14) in which the medical sensor is...
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5295386 |
Apparatus for detecting acceleration and method for testing this apparatus
A sensor comprises a semiconductor pellet (10) including a working portion (11) adapted to undergo action of a force, a fixed portion (13) fixed on the sensor body, and a flexible portion (13)...
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5270009 |
Method of and apparatus for measuring oxygen concentration with limiting current oxygen sensor
Relation of the degree of interference to interference concentration is previously stored with respect to at least one interference gas influencing an oxygen indicated value of a sample gas, so...
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5239492 |
Automatic internal calibration circuit and method
Apparatus for calibrating the gas detector of a gas analyzer includes a gas source circuit for providing a standard sample gas at a substantially constant, predetermined pressure. The gas source...
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5147561 |
Device for sampling and stripping volatile chemicals within wells
A sampling device for sealed positioning within the casing of a well contains a stripping chamber for stripping a ground water sample of its volatile compounds at or near the point of collection....
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5090232 |
Method and apparatus for detecting odors
The invention involves the detection of odors using an odor detector including an n-type semiconductor sensor having an electric resistance responsive to odor molecules adsorbed thereonto. An...
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5061631 |
Method, apparatus and solution for calibration of partial pressure value
Electrodes for the measurement of pCO2 and/or pO2 are calibrated with an exposed aliquot of a calibration liquid. A constituent such as a ferrioxalate salt in the calibration liquid is converted to...
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5053200 |
Flammable vapor analyzer
An apparatus is provided for the analysis of flammable vapors in an industrial application, such as a solvent drying operation or the like. The apparatus continuously withdraws and returns a sample...
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5009099 |
Background correction method for use in gas chromatography
A method of correcting for background changes in a plasma emission detector comprising a photodetector array is disclosed. In the photodetector array a plurality of sensors are used to detect the...
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5007283 |
Method and device for processing measured values
In connection with a method and a device for processing measured values, where resistance variations are evaluated as a measure for the variation of the gas concentration to be measured, it is...
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4985123 |
In situ polarographic sensor calibration
A coated polarographic sensor is calibrated by exposing the sensor to calibration media having known temperatures and species chemical potentials. The sensor is allowed to equilibrate with respect...
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4930095 |
Output correction system for analog sensor
This invention is directed to an output correction system for an analog sensor which outputs an analog signal corresponding to a quantity of state. The output correction system for the analog...
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4918311 |
Set point control circuit for an infrared gas analyzer
An arrangement for ensuring the stability of the set point for a gas analyzer is disclosed. The set point control circuit utilizes an amplifier which is alternately switched between a reference...
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4914424 |
Oxygen concentration monitor using galvanic cell type oxygen sensor
The invention discloses an oxygen concentration monitor using a Galvanic cell type oxygen sensor. An automatic calibration circuit always calibrates the maximum output of the sensor as the value...
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4896526 |
Continuous monitoring of a gas mixture
A method and an apparatus for the continuous monitoring of a gas mixture which contains explosive gases, for example in drying furnaces of painting or coating plants, with the concentration of the...
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4878380 |
Method of testing catalytic converters and oxygen sensors
A method for testing catalytic converters is disclosed that uses optimum engine settings to determine the operational efficiency of catalytic converters. The method consists of the steps of:...
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4864229 |
Method and apparatus for testing chemical and ionic sensors
A method and apparatus for automatically testing chemical and ionic sensing electronic circuits is provided. A fluid used in testing is placed in a hollow pipette with at least one open end. The...
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4852384 |
Automatic calibration and control system for a combined oxygen and combustibles analyzer
An automatic calibration and control system for a combined oxygen and combustibles analyzer comprises a process control computer which automatically calibrates a combined oxygen and combustibles...
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4779446 |
Oxygen monitor
The present invention is an improved method and apparatus for condition sensing and displaying a numeric value associated with the sensed condition wherein the improvement comprises (1) circuitry...
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4726216 |
Sensitivity-calibration circuit for an HC analyzer
A sensitivity-calibration circuit for an HC analyzer includes a scale factor adjuster for setting a scale factor in the analyzer for determining an n-hexane reduced gas concentration value of...
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4722219 |
Method and apparatus for zero drift compensation in a leak detector using a trace gas detector circuit
A method and apparatus are disclosed for automatically compensating for the effects of variations in ambient trace gas levels or other causes of drift in trace gas leak detection testing, by...
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4713618 |
On-line calibration system for chemical monitors
An on-line calibration system for calibrating chemical monitors which monitor a selected chemical characteristics of a fluid sample stream, including a conditioning system for conditioning an...
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4704607 |
System for remotely adjusting a parameter of an electrical circuit within an enclosure
Gas sensors 1 are mounted on respective explosion proof housings 2 that contain microprocessor circuitry 11 for operating signals from the sensors. Signals from the circuitry 11 are transmitted...
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