Exposure limits for carbon dioxide in the State of Washington (USA) 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located in St. Helena, (CA USA) is one of the original five Napa Valley wineries founded in 1933 after Prohibition was repealed.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. They have supplied six Guardian 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 levels are the most critical.
The Guardian NG monitors provide near-analyser quality with continuous 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.
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 levels should ever reach levels of concern.
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