Zehnder CO2 Sensor Manuel D'utilisation page 20

The device may only be installed and
maintained by a qualified professional.
The responsibility for the correct use of
the device lies with the end user. The
manufacturer cannot be held responsible
for any (consequential) damage caused
by inexpert, incorrect or inadvisable use.
Do not get the device wet. Do not install
it in a damp place.
20 - EN