The Mars Rover Curiosity is
equipped with customised
Vaisala Barocap and standard
Vaisala Humicap pressure
and humidity sensors.

The HMP155 has a new
generation Vaisala Humicap
180R sensor. It is said to have
excellent stability even in
harsh environments due to
its solid probe structure.

The pressure measurement
of the PTB330 Barocap digital
barometer is based on the
Vaisala Barocap silicon
capacitive, absolute pressure
sensor that is said to
provide high
measurement
accuracy and good
long-term stability.

These are part of
instrumentation
designed by the
Finnish Meteorological
Institute (FMI), and will be
used to gather accurate
readings of pressure and
humidity in the extreme
conditions of the Martian
atmosphere.

Vaisala’s technology will be
used to compile time series on
pressure and humidity for the
duration of the entire Mars
Science Laboratory program,
which is one Mars year, 686
Earth days.