Gas Detection 5
components, typically 30% water and 70% ammonia. The wide boiling range of the mixture gives noticeable efficiency gains when compared to other technologies used in the geothermal generation of electricity.
Water treatment
Chlorine, a halogen, has principal uses in the production of a wide range of industrial and consumer products, in water treatment plants and in disinfectants and bleach. It is also widely used to kill bacteria and other microbes in drinking water supplies and public swimming pools. Sensoric sensors are primarily used in chlorine manufacturing plants and for measuring chlorine dioxide levels in water treatment facilities.
Other industries
which are emerging as a viable alternative to carbon-based generating plants. The Kalina thermodynamic cycle converts thermal energy to mechanical power; it is optimised for use with thermal sources such as geothermal heating that are at a relatively low temperature compared to the ambient temperature. The cycle uses a working fluid with at least 2
Sensoric electrochemical sensors are used to protect against leakage or over-concentration of toxic gases used in other critical industries. Hydrogen fluoride, corrosive and toxic, is widely used in the petrochemical industry as a catalyst in alkylation processes in oil refineries. Hydrogen cyanide, which is extremely flammable and very toxic, is used in the electroplating industry, the mining sector and metallurgy, either in its own right or as a precursor to the production of sodium cyanide and potassium cyanide. Sensoric sensors are also used to monitor potential hydrazine leakage from the reserve fuel tanks on the European Space Agency’s Ariane 5 rockets.
Conclusions
Over the past 20 years Sensoric technology has not only changed the dynamics of the global semiconductor industry, it
has played a large part in the electronic revolution which is transforming the social and industrial landscapes of the developed and developing world.
Sustained investment in R & D, new product innovation and a continual programme of enhancements to existing sensors, are just some of the reasons why Sensoric and City Technology have maintained their pioneering position in the world of toxic gas detection in both established and emerging industries. Close working partnerships with customers are also a central part of the Sensoric philosophy, demonstrated by the fact that the first customers for Sensoric sensors remain major users of the products some 20 years later.
The company’s commitment to advanced manufacturing and outstanding service, will ensure that the developments seen during the last 20 years lay the foundations for Sensoric’s sustained growth in the highly specialised toxic gas sensor market.
Performance Test Approvals for Multi-Gas Detectors GfG (Germany) announce that performance test approval for its’ G450 and G460 multi-gas detectors has been achieved.
It is a legal requirement in EU countries that portable multi-gas detectors used in hazardous locations should have their gas detection performance tested and verified by an independent test authority, and approved to EN European standards. The G450 and G460 are certified to the following standards; EN 60079-29-1 Performance test for combustible gas sensors , EN 50104 Performance test for oxygen, EN 45544-1 Performance test for toxic gases, EN 45544-2 Performance test for toxic gases and finally the EN 50271 Software.
In addition, the flammable gas performance test approval (EN 60079-29-1) for the G450 and G460 includes methane, propane, hexane and n-nonane, so the user is protected against the whole range of combustible gases that may be encountered.
“For many years, users of gas detection instruments have had no sure way of knowing that the product they are using is actually doing the job it was intended for”, said Gavin Boorman, President of GfG Europe. “ATEX approval is essential to ensure electrical safety, but ATEX alone does not tell you if your gas detector is actually detecting gas in compliance with the required standards. These new EN standards for performance testing give users peace of mind that the gas detection performance of the product they choose has been independently tested, and that it complies with the required standards.”
Reader Reply Card No. 13
Stand Alone Gas Detector
The Gas Point from Recom (Italy) is an economical,
microprocessor-based gas detector for continuous monitoring of toxic gases, oxygen
or inflammable gases. Non intrusive calibration and maintenance is performed using a magnetic wand to access the software through the enclosure window – no need to open the enclosure (and obtain special area permits) to perform routine calibrations.
The backlight LCD graphic display shows the gas reading, with wide and visible numbers, together with the measure unit and the gas name.
High sensitivity, long term stability and no false alarms are the hallmark of the new and improved sensors. Fastest response to the target gas combined with minimal interference buy other gases or environmental influences as well as the sensor life-time determine the reliability and the operating cost of a system. Moreover, Gas Point has an analogue 4-20 mA output, for remote control or to transmit the alarm signal. Integrated control on the power supply assures correct working in the case of unstable voltages.
Reader Reply Card No. 14 Reader Reply Card No. 15
IET May / June 2011
www.envirotech-online.com
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