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8144327 |
Photoacoustic apparatus, and probe for receiving photoacoustic waves
A photoacoustic apparatus obtains information on a specimen by receiving photoacoustic waves which are generated from the specimen resulting from light irradiated to the specimen. The apparatus...
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8077317 |
Sensor head for a dry powder agent
A sensor head for a dry powder agent according to an exemplary aspect of the present disclosure includes a housing defined along an axis along which light is communicated, the housing defines a...
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8040518 |
Cavity enhanced trace gas detection gradiometer
A method and device for measuring trace levels of particles in an air sample is described. A device operating in a gradiometer configuration with two cavities built from a monolithic structure and...
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7982869 |
Compact, low cost Raman monitor for single substances
Apparatus for performing Raman analysis may include a laser source module, a beam delivery and signal collection module, a spectrum analysis module, and a digital signal processing module. The...
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7932490 |
Size segregated aerosol mass concentration measurement device
An apparatus and method for estimating size segregated aerosol mass concentration in real time and using a single detector. A beam of electromagnetic radiation is passed through a particle stream...
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7903158 |
Image capturing apparatus with adhesion suppressing capabilities
This invention can suppress adhesion of dust to the surface of an optical filter and the cover glass surface of a solid-state image sensor without any optically adverse effect. An image capturing...
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7864323 |
Method for measuring the concentration of a gas component in a measuring gas
There is described a method for measuring a concentration of a gas component in a measuring gas, wherein the light of a wavelength tunable light source is passed along a single optical path through...
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7852469 |
Particle detector
A particle detection device and method wherein a bulk sample of particles is selectively collected based on scattering properties of the particles and fluorescence properties of the particles. The...
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7808620 |
Microchip testing device
A testing device equipped with: a microchip having a receiver for a test fluid, a discharge lamp which emits light into the microchip test fluid receiver, a light source housing in which the...
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7808640 |
Photoacoustic spectroscopy system
A system for providing photoacoustic spectroscopy. A light source having a quantum dot filter may provide a band of infrared light which is to be reflected by a lamellar grating to a photoacoustic...
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7435391 |
Light-mediated micro-chemical reactors
A chemical reactor includes two substrates that are joined along a surface and a chemical reaction chamber formed between the substrates. The chemical reaction chamber has a hollow interior and one...
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7400407 |
Meter for measuring the turbidity of fluids using reflected light
A meter for measuring the turbidity of a fluid includes a light source for directing a light beam through a fluid under test towards a reflective surface and a sensor for detecting light reflected...
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7382459 |
Spectroscopic gas sensor, in particular for detecting at least one gas component in the ambient air, and method for manufacturing a spectroscopic gas sensor of this type
A spectroscopic gas sensor is provided, in particular to detect at least one gas component in the ambient air, and a method for the manufacture of a spectroscopic gas sensor of this type. The gas...
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7354553 |
Method and apparatus for detecting the presence of elemental mercury in a gas sample
An improved elemental mercury analyzer utilizes a fluorescence assembly in combination with a fluorescence quenching reduction mechanism to detect the concentration of elemental mercury within an...
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7352464 |
Oxygen sensor for aircraft fuel inerting systems
An apparatus and method for monitoring oxygen concentrations in fuel tank ullage comprising providing a sensor head comprising an optical cavity, exposing the optical cavity to an ambient gaseous...
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7283243 |
Semiconductor diode laser spectrometer arrangement and method
A method apparatus for sensing gases using a semiconductor diode laser spectrometer, the method comprising: introducing a sample gas into a non-resonant optical cell (17); applying a step function...
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7227642 |
Absorbance monitor
This invention relates to a multi-component absorbance monitor, and the object is to provide a general-purpose and highly accurate compact absorbance monitor. Disclosed is an absorbance monitor...
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7112447 |
Hand held gas analyzer
A lightweight and portable analyzer is provided. At least one component of the analyzer is made from a lightweight material, such as ABS. A manifold can have a plate and gas passages ultrasonically...
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7095501 |
Ethyl alcohol sensor and method of use
An ethanol sensing unit and a method of using, wherein the unit is particularly suitable for use in a confined environment such as the passenger compartment of a passenger vehicle. The sensing unit...
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7016039 |
Purging light beam paths in optical equipment
Purging of a light beam path in an effective manner that minimizes the affect of the purging requirement on system throughput. In one embodiment, the invention is incorporated into a birefringence...
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6989549 |
Optical gas sensor
A robust gas sensor can be manufactured in a simple manner and at low cost, and have no movable optical components. A measured gas cell (3) has a wall defining a cylindrical space with a measured...
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6943886 |
Method for enhanced gas monitoring in high particle density flow streams
A method for conducting laser absorption measurements in high temperature process streams having high levels of particulate matter is disclosed. An impinger is positioned substantially parallel to...
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6885453 |
Gas permeable probe for use in an optical analyzer for an exhaust gas stream flowing through a duct or chimney
A gas permeable probe for use in an optical analyzer for an exhaust gas stream flowing through a duct or chimney has: an elongate hollow structure having first and second ends and a side wall, with...
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6755074 |
Liquid chromatographic method and system
To economically perform preparatory chromatography, a plurality of pumps each having a corresponding one of a plurality of pistons and a corresponding one of a plurality of cylinders are driven by...
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6756906 |
Self-diagnostic smoke detector
A self-contained smoke detector system has internal self-diagnostic capabilities and accepts a replacement smoke intake canopy (14) without a need for recalibration. The system includes a...
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6507013 |
Optical reference element and procedure for the spectral calibration of an optical spectrum analyzer
An optical reference signal with a gas sealed in a space, an optical fiber and a lens collecting the light beam exiting the optical fiber before the front end of the space and a photodetector at...
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6377348 |
Smoke chamber for evaluating foundry sand shapes and its method of use
A smoke chamber for determining the amount of visible smoke emitted by a foundry core/mold resin system is composed of an elongate chamber having a proximal end, a distal end, and sides. The...
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6351999 |
Vortex flow sensor
This sensor for measuring the flow velocity and/or the flow rate of a fluid provides an optical sensor system which is also suitable for use at temperatures higher than 400° C., does not come into ...
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6108072 |
Protection for optical sensors in industrial applications
This invention describes method and apparatus for protecting optical sensors in harsh industrial environments, particularly welding and machining. In a preferred embodiment, a sacrificial window is...
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6067167 |
ILS sensors for drug detection within vehicles
On-board ILS sensors for detecting illegal drugs and based on intracavity laser spectroscopy (ILS) are provided for detecting the presence of drugs and their metabolized by-product vapors in an...
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6050656 |
Optical based opacity and flow monitoring system and method of monitoring opacity and flow
A pollutant emissions monitoring system and a method of measuring pollutant emissions, particularly fly ash, of gas passing through stacks of coal-fired boilers. An all optical-based emission...
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5993743 |
Hand-held vehicle exhaust analyzer
A vehicle gas analyzing system for testing gas content in exhaust emitted from a vehicle is disclosed. The vehicle gas analyzing system is of a size and weight to be held in a user's hands. The...
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5907407 |
ILS sensors for alcohol detection within vehicles
On-board ILS ethyl alcohol sensors based on intracavity laser spectroscopy (ILS) are provided for detecting the presence of ethyl alcohol vapors in a vehicle. The sensor comprises: (a) a laser...
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5854685 |
Holographic gas analyzer utilizing holographic optics
The present invention relates to an analyzer for determining the concentration of substances, such as chemicals, present in a fluid medium, such as gas, vapor or liquid, using holographic optics....
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5852398 |
Apparatus for indicating failure of an air filtration system in a diesel engine
An apparatus is disclosed for continuously sampling, at a point downstream of the air cleaner, the normally clean air entering an air induction system of a diesel engine to produce a signal...
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5844668 |
Protection window for optical sensors in industrial applications
This invention describes a method and apparatus for protecting optical sensors in harsh industrial environments, particularly welding and machining. In a preferred embodiment, a sacrificial window...
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5835230 |
Method for calibration of a spectroscopic sensor
A novel method for calibration of a spectroscopic sensor is provided. In the method, a spectroscopic system is provided. The system includes a measurement cell having one or more walls which at...
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5831730 |
Method for monitoring particulates using beam-steered solid-state light source
An improved method of monitoring particulates in stacks or ducts utilizes transmissometer/particulate monitor of the type which has an optical assembly containing a solid state light source of...
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5751424 |
Scalable non-contact optical backscatter insertion probe
A non-contact optical backscatter insertion probe includes an outer chamber, an electromagnetic energy source positioned within the outer chamber for emitting photons towards a medium to be...
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5742054 |
Ultra-sensitive detection of contaminants in corrosive gas via intracavity laser spectroscopy (ILS)
Contaminants in corrosive gases are detected optically at concentrations below 1 part-per-million (ppm) and extending to a level below 1 part-per-billion (ppb) by using intracavity laser...
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5696592 |
Immersible apparatus for measuring light penetrability of liquids
An apparatus for measuring light penetrability of liquids, including: a water-tight, heat, compression and chemical resistant casing, a light source mounted inside the casing and controlled to...
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5694208 |
Sensor for detecting fine particles such as smoke or dust contained in the air
An LD light-emitting circuit 2 comprises an analog multiplexer MP having a plurality of switches, and resistors R7, R8, R9 and R10 connected to these switches. When the temperature is not higher...
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5621213 |
System and method for monitoring a stack gas
A stack gas monitor system has an optimized gas flow portion which is permanently installed in a fossil fuel burning facility, and to which a spectrophotometric portion can be readily coupled for...
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5600444 |
Detecting analyte light absorption utilizing degenerate four wave mixing
A method and apparatus using either two or three input laser beams in a nonlinear degenerate four-wave mixing arrangement for ultrasensative analytical measurements of an analyte. In accordance...
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5528040 |
Ring-down cavity spectroscopy cell using continuous wave excitation for trace species detection
An apparatus for detection and measurement of trace species in a sample gas. A ring down cavity cell is filled with the sample gas. A continuous wave laser emits radiation, which is directed from...
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5502434 |
Smoke sensor
A separate type photoelectric smoke sensor having a light emitting section for emitting a light beam to a reflecting plate disposed at a certain distance from the light emitting section, a light...
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5452234 |
Process environment monitoring system
A process environment monitoring system collects and tests air samples from a number of different sample locations. Each sample is drawn into a sample test chamber into which a beam of infrared...
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5424842 |
Self-cleaning system for monitoring the opacity of combustion engine exhaust using venturi effect
A self-cleaning smoke-monitoring system that is used in measuring opacity of exhaust from an internal combustion engine. The invention includes a pair of air passages that supply a flow of filtered...
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5418366 |
IR-based nitric oxide sensor having water vapor compensation
A system (10) for detecting nitric oxide (NO) within an exhaust plume (14) includes a source (18) for generating an optical beam (20) and for directing (22, 24) the optical beam through the exhaust...
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5418616 |
Method and apparatus for optically detecting the dimensions of an object and use of the method
Two optical windows serve for the passage of a light beam through a treatment chamber in which a product is disposed whose dimensions are to be detected. Between the treatment chamber and each one...
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