I did an illustration of a scientific laboratory facility. It was meant to demonstrate the capabilities of the lab. The various structures and equipment are not necessarily to perfect scale. We adjusted things to make sure equipment stood out. Walls and doors were lowered to provide better visibility in the rooms. Below is a detail of one of the laboratories.
In order to render the pieces of laboratory equipment, the client gave me a PDF with pictures of all of them. Many were of very poor quality. I went to various manufactures, distributors and resellers websites to find better reference. I downloaded User Manuals and in one case contacted a manufacture to resolve an issue with the accuracy of one of the product photos the client provided. (the rep was nice enough to tell me that the client had provided a photo of an older model. He then directed me to some images on their website and I was able to render the image more accurately.)