Product description
The pipes inside are considered to be technically leak-tight. Due to the way they are constructed, some
sensors can only be used with plug connections which are secured with spring terminals. As an additional
safety measure, the high-quality methane sensor that is integrated in the gas analysis system is used to
track down possible leaks. In case of a leakage, the first valve will cut off the supply of measuring gas.
Each measuring channel is filled for a maximum of 120 s with measuring gas and is subsequently flushed
with air for at least 60 s . As the air for flushing is sucked out of the inside of the gas analysis system, the
composition of the air inside the device casing can be measured every 2 minutes . Fresh air flows from
outside into the device casing via a sintered metal frit (air filter). Upon detection of > 1.0% of methane(=
20% LEL),all actuators will be shut down and the valve V1 cuts off the supply of measuring gas. Optionally,
a potential-free contact is opened. Additionally, an error message is shown at the display. A potentially
explosive atmosphere could thus be prevented behind valve V1 despite leakages. The gas path up to V1
is made with pressure-resistant pipes and clamp ring screw connections in a technically permanently leak-
tight manner as described above.
For devices without methane sensor or with continuous methane measurement, safety is ensured by other
means (e.g. reduced number of potential leakage points, see risk assessment).
4.5.6
Release of Potentially Toxic and Harmful Gases
The device itself releases no gases, only the gases contained in the measuring gas can be released. In
accordance with its intended use, the device is used for the analysis of biogas and upgraded biogas and
the gases contained therein may be released correspondingly.
In normal operation and when used as intended, these gases are not released. The risk of exposure
hazards arising from release due to leaks is considered sufficiently low according to risk assessment.
19
