Great tip! I haven’t noticed noise issues in our data but we never used AEM widebands. A lot of people do and it’s probably not just AEM so definitely something to watch for.
Doubt it's the aem. I've run an AEM for 7+ years. But, I use shielded twisted pair cable for all my analog data inputs. Shield grounded at the data logger end, only.
Single ended sensors with chassis ground are a recipe for noise coupling.