Emf 5s actually have a specific timing element to them - when a ghost performs any valid interaction, there's a precise 25% chance window for the reading to trigger. Watch for those critical ghost interactions like object throws or manifestations, and start scanning immediately since the emf signal decays quickly. The optimal positioning is to maintain line of sight with the interaction point while staying mobile, as readings can occur anywhere the ghost touches stuff not just the ghost room. During intense activity phases when multiple interactions happen rapidly, focus your emf reader sweeps on fresh disturbances, and remember to check doorways and hallways where the ghost paths through.

At high activity thresholds when the ghost starts chain-interacting, you'll need quick reflexes to catch those emf 5 windows, especially if you're using basic tier equipment that updates slower. Maybe interesting - the ghost's interaction points create a sort of breadcrumb trail you can follow to predict where emf 5s might pop up next.