The new housing is designed and is going to be sent into production. As we measure light intensity a high-sophisticated design to keep as much light from the surrounding away from the sensor is crucial for the project success.
The old housing got to small and also the plastic used was not sufficient to keep all the light out. In contrast to the old housing the new one takes advantage of screwed lids, which are sealed with o-rings from a local company (Dione in Uppsala). Moreover everything is supposed to be accessible easily since every side can be opened.