The Entity Detector is a block that emits a redstone signal if it detects a certain type of entity in a configurable radius around it. If you right click on the block it will open a gui in where you can change the radius & the type of entity the detector is supposed to react to. You can also invert the filter (If you invert "Players" the detector will emit a redstone signal if any entity that is NOT a player is inside of its radius). If you set the Filter to Custom the block will use the entity filter in its inventory slot as its filter.


Screenshot Entity Detector.png

Entity Detector.png