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Installation
place of transmitters
The Legend of light and heavy
gases.
To
ensure that the transmitter of a gas detection system recognises
hazardous gas concentrations the gas has to enter the sensor element
of the transmitter quickly. The time until the alarm is triggered is
therefore not only determined by the response time of the sensor,
but also by the choice of the installation place.
Often the following rule of thumb is taken into
consideration when selecting theinstallation place:
- Gases lighter than air ascend, therefore the
measuring elements are mounted near the ceiling.
- Gases (or vapours) heavier than air sink,
therefore the measuring elements are mounted near to the
floor.
We
would like to show you why in most of the cases the maximum
potential of protection of the gas detection system is not
completely used or it might even come to dangerous situations when
following this rule of thumb. But we have to look into the
properties of gases and vapours first.
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