Abstract—We present an environmental monitoring system
based on wireless sensor network for air quality measurement
and natural gas leakages. The system is based on catalytic offthe-self
available gas sensors and on a novel strategy of sampling
and processing which permits to reduce the energy consumption
of one order of magnitude. The characteristic of the sensing
device has been extracted both with the standard utilization
and the new proposed approach, to compare and validate our
results. Moreover the importance of the humidity present in
the environment has been taken into account and included in
the model, because it severely affects the measurements. The
wireless sensor network developed has been also extended using
a smartphone to enable data sharing over internet and to enhance
portability of the overall system.