You can find electronic sensors lying around in buildings, but particularly apartmentsInfinity WardAnd in certain containersInfinity WardYou can also search PCs for themInfinity WardI got all ten of mine in Hanrim Village in the north, but any packed area of buildings should workInfinity WardYou'll need electronic sensors in Modern Warfare 4's DMZ mode to upgrade your starting stash, which quickly runs out of space after the first couple of matches. Unlike rigid synthetics, the other material you need, you likely won't find enough electronic sensors without looking in the right place.The best places to get electronic sensors are:Inside buildings, but particularly apartments and apartment blocks. I found quite a few as loose items or inside bags.Inside computers. If you spot a computer, open it up and take a look.While there are residential buildings all over the map, I had the most luck in Hanrin Village in the north, where one run south along the road gave me all ten sensors I needed.The good thing about apartment buildings is that they also usually have a lot of rigid synthetics, so you can kill two birds with one stone. So, search buildings, computers, and make sure to bring a blue, medium backpack so you can secure slot what you do find, and still progress to that upgrade even if you don't manage to exfil.2026 games: All the upcoming gamesBest PC games: Our all-time favoritesFree PC games: Freebie festBest FPS games: Finest gunplayBest RPGs: Grand adventuresBest co-op games: Better together