Dominik that is, it cannot be ordered anywhere ?
If your camera did not come with an external desiccant barrel, it will have locations inside the sensor chamber to hold the desiccant pills (which is widely available).
Just be careful to open the chamber in a dust-free room.
I usually have a table top fan with a HEPA filter and a hand held vacuum with HEPA filter (https://www.amazon.com/gp/product/B097XRM28M) blowing at the camera across the sensor when I open my cameras.
With the clean air blowing, it is best to hold the camera with the sensor pointing to the floor to let gravity help reducing dust on the sensor. Use lint free gloves.
Hand held bulbs with filters (used by photographers) are marginally OK, but the hand held vacuum cleaners are cheap enough nowadays, and are much more effective than the bulbs -- you will need it often to clear the dust off your camera's protective window and filters, so it pays for itself in no time.
Chen
