{"id":10927,"date":"2020-08-03T10:14:00","date_gmt":"2020-08-03T08:14:00","guid":{"rendered":"https:\/\/blog.gsa-messgeraete.de\/gas-in-potentially-explosive-atmospheres-sg350ex-and-sg5100ex\/"},"modified":"2025-04-30T14:52:47","modified_gmt":"2025-04-30T12:52:47","slug":"gas-in-potentially-explosive-atmospheres-sg350ex-and-sg5100ex","status":"publish","type":"post","link":"https:\/\/blog.gsa-messgeraete.de\/en\/gas-in-potentially-explosive-atmospheres-sg350ex-and-sg5100ex\/","title":{"rendered":"Gas in potentially explosive atmospheres – SG350ex and SG5100ex"},"content":{"rendered":"\n

The GSA measuring devices <\/strong>SG350ex<\/a> and SG5100ex<\/a> have been specially developed and certified for use with gas in potentially explosive atmospheres<\/strong> with the suffix “ex” <\/strong>.<\/p>\n\n\n\n

When it comes to measuring occupational safety <\/strong>in such a hazardous environment, it makes sense to use the GSA SG350ex <\/strong>or SG5100ex<\/strong> measuring device <\/strong>if contact with flammable gases<\/strong> is possible. <\/p>\n\n\n\n\n\n\n\n

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Both GSA measuring devices<\/strong> are equipped for both personal<\/strong> and stationary use<\/strong> for measuring hazardous substances <\/strong>such as gas<\/strong> at the workplace.<\/p>\n\n\n\n

What are “gases” and what influence can they have on occupational safety?

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Definition of gas
<\/strong><\/h2>\n\n\n\n

Something is described as a “gas<\/strong>” if the substance is in a gaseous state of aggregation<\/strong> under normal conditions, i.e. 1 bar pressure and 20\u00b0 Celsius<\/strong>. This means that the molecules<\/strong> can spread and move freely in space<\/strong>.<\/p>\n\n\n\n

The basis of thermodynamics<\/strong> is the concept of ideal gases. Under normal conditions (temperature 0\u00b0C, pressure 1.013bar), an ideal gas occupies a space of 22.4 liters per mole. This is known as the molar volume and is part of Avogadro’s law<\/strong>.
The general gas equation<\/strong> can be formulated on this basis: <\/p>\n\n\n\n

p * V = R * n * T<\/p>\n\n\n\n

p:<\/strong> Pressure in Pascal (Pa)
V:<\/strong> Volume in cubic meters (m\u00b3)
R<\/strong>: General gas constant 8.32 J\/(mol*K)
n<\/strong>: Amount of substance in mol (moles)
T<\/strong>: Absolute temperature in Kelvin (K)<\/p>\n\n\n\n

Using the general gas equation<\/strong>, the gas laws<\/strong> (e.g. Gay-Lussac) can be derived and transferred to real gases<\/strong>. For example, the required volume of a gas for a reaction (work process) can be calculated<\/strong>.

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Danger from gases during work
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At the workplace<\/strong>, contact with gases<\/strong> can have various causes. It can be part of the work process <\/strong>or production<\/strong> or arise as a by-product or waste product<\/strong>. <\/p>\n\n\n\n

In both of these cases, the presence of gases is known and requires safety-relevant handling<\/strong>. If pressurized gas cylinders are in use, they may only be used by designated personnel<\/strong>. Proper storage<\/strong> (no direct sunlight, secured against falling over) must also be ensured. <\/p>\n\n\n\n

When using, always open the valve slowly and by hand (no pliers or similar). After the gas has been removed, the gas containers must be closed again. DIN EN 1089-3<\/strong> specifies the color coding of gas containers<\/strong> so that the contents can be identified at first glance. <\/p>\n\n\n\n

Examples:<\/p>\n\n\n\n