18 Gas Detection


DD Scientifi c Launches Combustion Monitoring Sensors


DD Scientifi c, a leading manufacturer of gas sensors for industrial, commercial and residential safety applications, is pleased to announce the fi rst in a new line of products designed to make the measurement of combustion gas simple.


Traditionally, if you wished to measure carbon monoxide gas in the exhaust of a boiler or burner, your choices were limited to a few expensive sensors, available only from a small number of suppliers. With the DD Scientifi c F-range of gas sensors, you can benefi t from the high performance associated with our life safety devices, coupled with a competitive price position and market-leading application support.


Our novel carbon monoxide sensors, available in industry standard 20mm and 32mm diameter packages deliver superb gas response times and are fi tted with innovative fi lter technology ensuring they remain robust even in the most challenging of gas streams. The proprietary catalyst deposition techniques ensure that long working lifetimes are guaranteed which means that you can fi t a DD Scientifi c sensor into your fl ue gas analyser and be certain that it will meet its performance requirements for many years and avoid the annoyance of unplanned and inconvenient sensor replacement.


Commenting on the sensors’ release to the market, Daniel Davies, Managing Director commented, “For too long, there has been a monopoly in the provision of sensors to the emissions monitoring market. The launch of these new products from DD Scientifi c signal our intention to provide real alternatives to the established players and to offer genuine choice to OEMs who want to deliver value and performance to their customers.”


For more information about the new 4COF (20mm carbon monoxide sensor) or 7COF (32mm carbon monoxide sensor), please contact sales@ddscientifi c.com .


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Carbon Dioxide Levels and Safety Considerations in Winemaking


Although, at fi rst sight, winemaking might appear to be one of the most idyllic of occupations, it is an industry with its own serious safety concerns. The fermentation process that produces the highly desirable end product, whether it be a serious earthy, rich, Cabernet Sauvignon or a sweet, slightly decadent, Moscato, also produces a lot of carbon dioxide. In the realm of 40 times the volume of grape juice in fact. That is a lot of carbon dioxide and the health


implications of that amount of fatal gas cannot be ignored.


Dizziness, headaches, shortness of breath and increased heart rate are just some of the symptoms of raised workplace CO2


levels. Asphyxia, convulsions, and coma are the more


serious possibilities, plus of course other accidents related to over exposure can occur – even drowning. This is why accurate and rapid monitoring of CO2


is so important throughout


a winery, acknowledging both how localised areas of high gas concentration can build up and the way that the gas diffuses. Workers with jobs that involve them operating over open fermentation vessels may be particularly at risk thanks to CO2


gas build up and Oxygen


exclusion, but less obvious risks occur such as a night time build up of gas because of decreased ventilation through door openings.


Exposure limits for carbon dioxide in the State of Washington are 30,000 ppm as a short- term exposure limit averaged over any 15-minute work period and 5000 ppm as averaged over an eight-hour work shift. The National Institute for Occupational Safety and Health indicates 40,000 ppm (4%) as being immediately dangerous to life and health.


The Louis M. Martini Winery located in St. Helena, California is one of the original fi ve Napa Valley wineries founded in 1933 after Prohibition was repealed. They produce many of the wines that have made the California vineyards so famous. As such the Louis M. Martini Winery is a very popular stop on the Napa Valley wine tasting circuit. The need to ensure the safety of visitors, and, of course, their own employees, has ensured that the Louis M. Martini Winery has taken CO2


monitoring very seriously. This is why the Louis M. Martini


Winery has invested in Edinburgh Sensor’s Guardian gas monitors. We have supplied six Guardian CO2


levels are the most critical. The Guardian NG monitors provide near-analyser quality with continuous CO2 monitoring units, initially the Guardian Plus units, followed in 2011 by


Guardian NG infrared gas monitors units in the winery barrel rooms and other particularly important places where CO2


sampling,


measurement and display of target gas concentrations for detection level ranges of between 0 – 3000 ppm and 0 – 100% by volume. The Guardian NG wall-mounted monitors are easy to install and can detect gases from sampling points up to 30 metres away. The robust plastic IP54 rated enclosures prevent the ingress of water and particulates in this busy working environment. Graphical display of historic readings is possible for any period the winery may be interested in and data is easily transferred via an on board RS232 interface with optional Ethernet interface with relay outputs for control of external devices.


Like all of our sensor and monitoring ranges these Guardian NG monitors offer a winning combination of low maintenance and long-term stability. These particular units have been in continuous operation since installation and are linked to a comprehensive alarm and door closing system to alert staff and management if CO2


of concern.


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Small in Size, Huge in Performance - Expanded Gas Detector Range


Small in Size, Huge in Performance - The LRM- 202 (TO46 housing) and the LRM-254 (TO39 housing) expand InfraTec’s range of miniaturised multi-channel detectors. In their cap a central window has been added, that can be soldered to the housing to create a complete hermetic seal. The channel fi lters are placed inside the detectors. There, they are shielded from mechanical and physical stress as well as from other strains from harsh environments. While the fi eld of view is signifi cantly wider, more radiation reaches the pyroelectric element and allows a higher signal. Therefore, the whole series proves to


be extremely powerful. Being thermally compensated these detectors are suitable for gas analysis and leakage detection and can be used in stationary and portable devices.


Visit InfraTec at AQE 2017, Stand 40. IET May / June 2017 www.envirotech-online.com


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levels should ever reach levels


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