The Airpointer housing comes in 3 different sizes: 2D, 4D, and HC. Some housings can hold a PM monitor, others can’t. Some can handle very high outside temperatures, but not all of them. Some can have 2 analyzers in one drawer, but it depends on several parameters…
You are confused? Then go to https://www.airpointer.tech/airpointer-base-unit/, download the excel file, answer the 4 questions, and it will tell you what you need.