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Air Monitoring Remote Imaging Chemical Sensing System
The new Hyperspectral Imaging System HI 90 from Bruker Optics (USA) is an imaging remote chemical sensing system based on the combination of a Michelson interferometer with a focal plane array detector. Each pixel of the array records an interferogram from the corresponding field of view. A spectrum at each pixel is obtained by Fourier transformation and contains the infrared signature of the image at each point. The HI 90 system allows fast identification, quantification and visualization of potentially hazardous gases remotely from long distances.
Due to its array detector, the HI 90 hyperspectral imager can measure all pixels simultaneously up to 1000 times faster than traditional scanning systems which record the spectra at each pixel sequentially. The new HI 90 represents a new ultra-high performance hyperspectral imaging system in Bruker’s broad remote sensing product line, which
also consists of the Scanning Infrared Gas Imaging System SIGIS 2 for homeland security and scientific applications, the mil-spec 360 degree scanning stand-off detector RAPID, as well as the ultra-high spectral resolution FTIR spectrometer IFS 125 for scientific applications in atmospheric research.
The new Hyperspectral Imaging system HI 90 has been developed for a wide range of applications. The method of infrared remote sensing allows the detection, identification, and quantification of a wide range of important organic molecules in the atmosphere. Applications of the HI 90 range from atmospheric research, environmental research and volcanology, to industrial safety and QC applications, to public safety and security applications.
A major field of applications of the HI 90 system is homeland security. If hazardous compounds are released into the atmosphere, e.g. in a potential terrorist attack or during a chemical accident, then emergency response teams require rapid and precise information about the identification and location of released compounds in order to take appropriate measures to protect workers, residents and the environment. The HI 90 system allows very quick identification and visualisation of such hazardous clouds from long distances of several kilometers. The image of a chemical gas cloud allows an assessment of the dimensions, dispersion and direction of travel of the released chemicals. In addition, the source of a cloud can be located in many cases.
These HI 90 gas cloud imaging capabilities also lead to new possibilities in industrial safety and leak detection applications. The system identifies the released gas and the image allows to pinpoint the location of the leak, allowing accelerated repair, saving money and stopping the potential impact on the environment. In industrial safety applications, several HI 90 systems can be the basis for a network of surveillance systems, increasing safety at industrial sites with early warnings about released chemicals in case of an accident.
In addition to gas sensing, the new HI 90 is perfectly suited for remote sensing of solids and liquids. Applications range from geological and environmental applications to homeland security: liquids such as traces of chemical warfare agents on a surface may be detected and mapped using the new HI 90 hyperspectral imager.
Reader Reply Card No. 167
Oxygen Sensors With Long Working Lives
The new electrochemical oxygen sensors from MST Intertrade GmbH (Germany) use a new type of electrolyte material, whose electrochemical reaction does not result in the passivation of the electrode. The working
life quoted by the manufacturer is therefore at least 10 years (20.8% O2 at 20 °C). The sensitivity is reduced within three years by less than 15%, and after 10 years by a maximum of 30%. The sensors are available in two
versions, with measuring ranges from 0 % to 30% O2 or 0% to 100% O2. They can be sued in a very wide working temperature range from -35 °C to +50 °C. The sensors show no cross-sensitivity with most gases. At a
temperature of 20 °C for example, 10% CO, 30% CO2 and 30% H2 do not interfere with the measurement. The company also offers microsensors, which are used particularly in the area of work safety for portable gas measuring devices. These sensors are used for example in the mining industry, in order to warn miners of too low oxygen concentrations or dangerous methane concentrations. With a working life of at least three years, these sensors are also extremely durable.
Reader Reply Card No. 169
Process Pumps for Special Applications
As an engineer you rely on precise measurement and control to assure that your process performs consistently. Reliable transfer of process media is dependent upon specialised pumps that operate continuously in critical environments without contaminating the liquid or gas used in the process.
KNF (UK) manufacture specialised pumps for exhaust emission and stack gas sampling, explosion proof pumps for hazardous locations, double safety diaphragm pump for rare and dangerous gases, and high flow sample pumps and compressors for durable, corrosion-free performance.
Reader Reply Card No. 168 Heated Gas Sampling Probe with Cut-off Valve
The heated gas sampling probe JES 301E1SVZ from JCT Analysentechnik (Austria) is designed for continuous use with extractive sampling systems in Zone 1 or 2. It comprises a cut-off valve which allows to shut off the gas flow on the raw-gas side. So this heated gas sample probe can also be installed for over pressure processes or where the sample contains dust and aerosols. JCT´s heated hose series JH can be easily connected to the JES 301E1SVZ by a movable PG42 fastening screw.
The operating temperature of 120°C is regulated by a maintenance free PTC heater. A ceramic filter element with a filter porosity of 2 micron ensures that the gas passes the heated hose free of dust particles. The filter can be replaced easily without any tools while the heated hose stays connected.
The heated gas sampling probe JES 301E1SVZ is extremely robust to provide many years of operation in harsh environment. Typical applications can be found in chemical and petrochemical industry.
A broad range of different materials for In-situ probe tubes and large In-situ-pre filters make the JES 301E1SVZ versatile in application. Reader Reply Card No. 170
Mobile CEMS Heads to Morocco
The Moroccan Ministry of the Environment recently purchased one of Environment S.A’s (France) fully equipped mobile Continuous Emission Monitoring System for the
continuous measurement of SO2-HCl-HF-CO-CO2-O2 (MIR-IS analyser)- flow rate, temperature and pressure + NO-NO2 (TOPAZE32M analyser) + total VOC (GRAPHITE52M analyser) and the WEX supervising software.
The mobile CEMS van, which has already been already delivered to the end user, will soon begin measuring industrial "on stack" emissions (Principal stationary pollution sources). It will be connected via heated sampling lines to the industrial stacks (one stack at time, during a defined period of time).
This mobile CEMS laboratory will complete the existing ambient air monitoring stations ( also from Environnement S.A ) and will be used by the National Laboratory of Studies and Monitoring of the Air Quality. This project was financed by the International Cooperation Office of the Monegasque Government.
Reader Reply Card No. 171 IET May / June 2012
www.envirotech-online.com Reader Reply Card No. 172
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