You might thought we were finished, but wait - there the sensor boom, this high-tech futuristic looking piece of proprietary Vaisala measurement know how.

Below the silver coating, which is to prevent light from warming up the boom is an ordinary flex PCB - how boring. That almost makes it feel like a movie prop - just shiny on the outside.

But our mood gets better when taking a look at the ceramic hybrid, which contains not only a capacitive type thin-film humidity sensor, but also a PT1000 temperature sensor and a heating element to keep the sensor at 5 K above ambient to prevent moisture condensing.

what looks like a hook is another PT1000, this time made out of platinum wire, who is as thin as possible to minimize its thermal mass. You better won't hang your sonde on this hook...