Alcohol testers re-calibration lab

Hi there!
I did it a few months ago, but wanted to know your opinion.
Notebook and chairs were not modelled by me (downloaded them from some repository). All the rest is made by me.

I didn’t want to fake some important objects, so there are a few quite complex items. There were some more details (nothing special), but my PC couldn’t manage to render the scene, so I had to simplify it a bit.

Please let me know what you think.