Originally Posted by aka123

"Vaisala has a presence in examining the Martian atmosphere as the Mars Rover Curiosity is equipped with Vaisala BAROCAP® and HUMICAP® pressure and humidity sensors. The sensors are a part of instrumentation designed by the Finnish Meteorological Institute (FMI), and they will be used to gather accurate readings of pressure and humidity in the extreme environmental conditions of the Martian atmosphere."

Mars Rover Curiosity Equipped with Vaisala?s Pressure and Humidity Sensors - Vaisala