S&P AIRSENS CO2 Manuel D'instructions page 14

MAINTENANCE
Before maintenance, make sure that the controller is disconnected from the
mains supply even if it is previously been switched off. Prevent the possibility of
anyone else connecting it while it is being inspected.
Regular inspection of the appliance is required, the frequency must be depend of
the working conditions to avoid the accumulation of dirt that could trigger risks
and would reduce the life expectancy. In all maintenance work, safety regulations
in each country must be taken into account.
PUTTING OUT OF SERVICE AND RECYCLING
EEC legislation and our consideration of future generations mean
that we should always recycle materials where possible; please do
not forget to deposit all packaging in the appropriate recycling bins.
If your device is also labeled with this symbol, please take it to the
nearest Waste Management Plant at the end of its servicable life.
Fig. 1: Electronic board
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