optical detection instrument Articles

  • Detection of moisture in ammonia gas

    Problem Statement As technologies advance, so does the request for ultra high purity ammonia. Ultra high purity (UHP) ammonia is used in the semiconductor industries, production of flat panel displays, and a number of other applications. Due to this rising interest in UHP ammonia, manufacturers are having to battle ammonia’s most prominent and damaging impurity--moisture. For ...


    By CIC Photonics, Inc.

  • Estimation of stand productivity from multi-angular optical remote sensing

    Global modeling of gross primary production (GPP) is a critical component of climate change research. On local scales, GPP can be assessed from measuring CO2 exchange above the plant canopy using tower-based eddy covariance (EC) systems. The limited footprint inherent to this method however, restricts observations to relatively few discrete areas making continuous predictions of global CO2 fluxes ...


    By PP Systems

  • Optical DO Sensors Opening Doors to Online Aeration Control

    BACKGROUNDThe benefits of using online, automated control of aeration systems using dissolved oxygen (DO) sensors are well known in the industry and have been widely documented (e.g. Olsson et al, 2005). In most wastewater treatment facilities using activated sludge, the electricity provided to the aeration system is one of the most significant operating costs and a good control system can help ...

  • Leak detection in semiconductor fab gas processes

    Problem Statement Often times in semiconductor fabs moisture levels are monitored to ensure that products aren’t damaged by excess moisture in the process. If there are above normal levels of moisture, pinpointing the source of that moisture can be difficult. The moisture could be evolving from impurities in gas tanks or leaks in the sampling lines. One way to avoid downtime ...


    By CIC Photonics, Inc.

  • Detection and measurement of toxic gases from destructive testing of batteries

    Problem Statement New formulations of organic-compound-based batteries for vehicle use must be tested for release of potentially harmful and toxic gases if crushed in accidents. Potential gases include hydrocarbons, fluorocarbons, and hydrogen fluoride, released within seconds of an incident. Actual time-resolved and quantitative data are required from destructive testing to ascertain ...


    By CIC Photonics, Inc.

  • Advanced gas detection technology supports arctic greenhouse gas research

    Enormous quantities of greenhouse gases (GHG) exist within Arctic ice and frozen soils, so with the threat of global warming, a clear understanding of the relationship between GHG in the atmosphere and in the ice/soil is vital because melting of permafrost could cause a dangerous climate tipping point. There can be few more challenging environments for monitoring gases, but PhD researcher Martin ...


    By Quantitech Ltd

  • Advanced Gas Detection Technology supports Arctic Greenhouse Gas Research

    Enormous quantities of greenhouse gases (GHG) exist within Arctic ice and frozen soils, so with the threat of global warming, a clear understanding of the relationship between GHG in the atmosphere and in the ice/soil is vital because melting of permafrost could cause a dangerous climate tipping point. There can be few more challenging environments for monitoring gases, but PhD researcher Martin ...


    By Gasmet Technologies Oy

  • Fire and Gas Protection Systems as Part of Safety Instrumented Systems and Risk Management

    Garth Watkins, Director Europe, Middle East, Africa, Detector Electronics Corporation, Presented at HazardEx International Conference 2008 Process-systems operators today face increasing demands for lower costs and higher safety standards in an increasingly regulated environment. In addition, companies desire to provide a working environment that is as safe as possible. As a result, plant owners ...

  • The determination of major and minor elements in air filters and urine for hazard assessment, using a new CCD DUAL-VIEWED ICP optical emission spectrometer

    This article describes the application of a new type of CCD-based, dualviewed ICP optical emission spectrometer for the analyses of industrial hygiene types of samples. Several trace elements in air filter media are determined by ICP-OES. Urinary electrolytes and trace elements are determined in a single dilution automatically in both the axial and radial plasma viewing orientations. Results of ...


    By PerkinElmer, Inc.

  • The importance of background in the Detection and Identification of Gas Plumes using Emissive Infrared Hyperspectral Sensing

    Abstract Using a Fourier transform infrared field spectrometer, spectral infrared radiance measurements were made of several generated gas plumes against both a uniform sky and terrestrial background. Background temperature, spectral complexity, and physical homogeneity each influenced the success of emissive infrared spectral sensing technology in detecting and identifying the presence of a ...


    By D&P Instruments

  • GE Leakwise Application Notes: Oil Sheen Detection -- An Alternative to On-Line PPM Analyzers

    Introduction Discharge of hydrocarbons in industrial water is restricted by environmental authorities in most countries to a few parts per million (ppm). Environmental authorities currently monitor wastewater, stormwater, and cooling water discharges from ...


    By GE Analytical Instruments

  • Construction of a low–cost laser–based multiplexed spectrometer: a potential probe for environmental pollution monitoring

    A low–cost, sensitive, laser–based (Helium Neon; He–Ne) optical Fourier–transformed (multiplexed) spectrometer has been constructed for the quantification of suspended particulates in the air. The optomechanical features of the spectrometer are presented together with a theoretical framework of its operation. The apparatus is calibrated by using a standard commercial spectrophotometer and has ...


    By Inderscience Publishers

  • PetroSense Hydrocarbon Sensors and Their Applications

    The increasing concern about hydrocarbon contamination of process water andproduced water has created an increasing need for in-situ, real time, and accurate low costinstrumentation that can provide rapid detection and easily usable in the field. PetroSense sensors [1,2] represents “best in breed” technology for the detectionof total petroleum hydrocarbons (TPH). PetroSense sensors ...


    By PetroSense, Inc

  • Confocal Micro X-ray Fluorescence 3D Elemental Imaging For Materials Characterization

    Confocal micro X-ray fluorescence is a new instrumental method for materials characterization. In a confocal geometry, the excitation and detection regions are bound by the same foci and therefore, share the same focal spot. This confocal arrangement is achieved by using two monolithic polycapillaries; one focuces the x-rays to a focal spot and the second optic is oriented on the dector side for ...


    By HORIBA Europe GmbH

  • Analysis of Whole Blood for Trace Lead (Pb) by Graphite Furnace AAS

    Toxic effects from heavy metals (Pb, As, Se, Cd, Bi, Sn, Tl, and Hg) have been characterized in medical literature for decades. Originally, complex extractions were performed to isolate the poisonous components from the complex biological matrices: blood, serum, urine and tissues. Recently, optical emission and atomic absorption spectroscopy techniques were developed to determine these toxic ...


    By Buck Scientific Inc

  • Capacitance Technologies have a real sense for the environment

    In the world of technology stars, capacitance has been type-casted. For over 100 years, capacitance has performed in countless applications for industrial control and automation. It is routinely used for high and low level alarm, continuous level monitoring, interface transmitters, plugged chute detection and even dry pump control. As new technologies have been introduced, ...


    By Arjay Engineering Ltd.

  • The World’s Most Sensitive Spectrofluorometers

    HORIBA Jobin Yvon manufactures a large range of fluorescence spectrofluorometers, including bench top models that make steady-state measurement to advance modular systems that can also measure fluorescence anisotropies and lifetimes of your samples. Introduction By virtue of its emission nature, fluorescence is an extremely sensitive technique, as compared, for example, to instrumentation ...


    By HORIBA Europe GmbH

  • A Raman-based endoscopic strategy for multiplexed molecular imaging

    Endoscopic imaging is an invaluable diagnostic tool allowing minimally invasive access to tissues deep within the body. It has played a key role in screening colon cancer and is credited with preventing deaths through the detection and removal of precancerous polyps. However, conventional white-light endoscopy offers physicians structural information without the biochemical information that would ...


    By AcuTech Scientific Inc.

  • Plume Sensing Direction Considerations

    Abstract Remote sensing using midwave and longwave spectroscopy has been shown to be capable of detecting gaseous effluents from a stack plume release. In general, measurements have been made through the plume cross-section. This paper discusses experiments and measurements conducted to examine the relative merits of viewing the plume's cross-section or viewing the plume along the axis of ...


    By D&P Instruments

  • Smart LDAR — more cost-effective?

    On December 19, 2008, EPA issued a final rule establishing a voluntary Alternative Work Practice (AWP) to detect leaks of volatile organic compounds (VOC) and hazardous air pollutants (HAP) from process equipment (FR Vol. 73, Number 246), thereby providing the regulated community additional flexibility in complying with leak detection and repair (LDAR) requirements. The AWP allows owners or ...


    By Trinity Consultants

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