Liquid Update Detector
Updated Dec 28, 2025
Alias: LUD
Definition
A Liquid Update Detector (LUD) is a device that uses liquids to detect a special set of updates, some of which can be detected with a Block Update Detector, with a Comparator Update Detector or with an observer, but some of which are exclusively detected by LUDs. After detecting the update and triggering, it usually resets the liquid to a state where it can detect an update again.