|Catches fire from lava||
The sculk sensor is a block that can detect vibrations and emit a redstone signal.
Sculk sensors can be mined with any tool, but hoes are the quickest.
- Times are for unenchanted tools as wielded by players with no status effects, measured in seconds. For more information, see Breaking § Speed.
Sculk sensors have a light level of 1, which is very inconspicuous. However, when active it visually shows a brighter yellowish light illuminating the surroundings.
Sculk sensors can detect vibrations in an 8 block radius around it. A vibration is anything that causes physical motion, although there are some motions that are undetectable to sensors by sneaking; these sneak-friendly vibrations include walking, falling to the ground or throwing/shooting projectiles.
Wool has a special interaction with sculk sensors. If a wool block is in the way of a vibration source, the sensor will not be able to detect it. In addition, sensors will not be able to detect walking on wool or throwing wool on the ground.
When a vibration is detected, a signal is sent from the source location to the sensor at a speed of one block per game tick (20 blocks per second). Other vibrations cannot be detected by a sensor when a signal is already travelling to it. When the signal has arrived, the sensor is activated for 40 game ticks (2 seconds). While activated, the sensor cannot detect other vibrations.
Sculk sensors have a cooldown period of 1 tick after being placed or after deactivating. During this short cooldown period, it cannot detect vibrations. This is to prevent it from activating itself when a contraption it is powering is being unpowered.
Sculk sensors don't listen to vibrations that are directly created by other sculk sources.
Sculk sensors can be silent if waterlogged, meaning that it can still detect vibration but don't make a sound while doing so.
Sculk sensors emit a redstone signal when they are activated. The strength of the redstone signal is inversely proportional to the distance the vibration signal traveled – the closer the vibration is to the sculk sensor, the stronger the redstone signal is, so it reaches the maximum redstone signal strength when the vibration is directly on top of the sensor.
Sculk sensors have a unique interaction with comparators. Each vibration in the game falls under a certain frequency value, and this value can be measured with a comparator as redstone output. With the right contraption, this allows the player to detect when a certain action has occurred nearby.
|Output||Vibration type||Game event||Description|
||An entity walks[note 1]|
||A flying entity (e.g. a bat) flaps its wings|
|4||Elytra Free Fall||
||Dives down with an elytra|
||An entity falls from a higher place[note 1]|
||An entity floats up[note 2]|
||A wolf shakes off water after getting wet|
||A projectile is fired[note 1]|
||A projectile hits something|
||Player finishes eating|
||An entity is damaged|
|9||Armor Stand Add Item||
||A piece of equipment is added to an armor stand|
||A door, trapdoor, or fence gate closes|
||A lever is turned off|
||A button reverts back to its unpressed state|
||A tripwire is defused|
||A dispenser fails to dispense an item|
||A door, trapdoor, or fence gate opens|
||A lever is turned on|
||A button is pressed|
||A tripwire is set|
||A block is placed|
||A fluid is dumped out of a bucket[note 3]|
|Flint And Steel Use||
||Flint and steel is used[note 4]|
||A block is destroyed[note 5]|
||A fluid is scooped up in a bucket|
|14||Fishing Rod Reel-In||
||A player reels in a fishing rod|
||A container closes|
||A piston contracts|
|15||Fishing Rod Cast||
||A player casts a fishing rod|
||A container (e.g. a chest) opens|
||A piston extends|
- Is ignored when crouching.
- Despite being an occurrence of splashing, sculk sensors will not detect the sounds of fishing bobbers hooking a fish; this has been confirmed by Mojang to be intentional.
- Using fish buckets to breed axolotls does not cause this vibration. This inconsistency is intentional.
- Using it to ignite TNT ( ) or creepers ( ) does not yet cause vibrations.
- This does not include blocks broken by flowing water (Creative mode, bee nests and beehives will not cause vibrations ( ). ), nor redstone dust, redstone repeaters, redstone comparators or any type of rail being broken due to its supporting block being removed ( ). Fire also does not seem to trigger this when a player puts it out ( ). If broken in
|Sound||Subtitle||Source||Description||Namespaced ID||Translation key||Volume||Pitch||Attenuation|
|Block broken||Blocks||Breaking the block||?||?||?|
|Sculk Sensor starts clicking||Blocks||Plays when sculk sensor is activated||?||?||?|
|Sculk Sensor stops clicking||Blocks||Plays when sculk sensor is deactivated||?||?||?|
|None[sound 1]||Blocks||Falling on the block with fall damage||None[sound 1]||?||?||?|
|Block breaking||Blocks||Mining the block||?||?||?|
|Block placed||Blocks||Placing the block||?||?||?|
|Footsteps||Blocks||Walking on the block||?||?||?|
|Name||Namespaced ID||Translation key|
|Name||Namespaced ID||Numeric ID||Translation key|
|Name||Default value||Allowed values||Description|
|power||The sculk sensor's current power level.|
|sculk_sensor_phase||Whether or not the sculk sensor is active.|
|waterlogged||Whether or not there's water in the same place as the sculk sensor.|
|October 3, 2020||The sculk sensor is shown off at Minecraft Live 2020.|
|November 13, 2020||The sculk sensor has a new texture and clicking animation in a tweet from Brandon Pearce.|
|November 23, 2020||The sculk sensor has a new clicking animation in a tweet from Brandon Pearce.|
|November 27, 2020||The sculk sensor has a new final texture in a tweet from Brandon Pearce.|
|Upcoming Java Edition|
|1.17||20w49a||Added sculk sensor with a new inactive and clicking animation.|
|20w51a||Eating Start has been removed as an event.|
|Entity Hit's frequency value has changed from 9 to 8.|
|Container Close's frequency value has changed from 10 to 14.|
|Container Open's frequency value has changed from 11 to 15.|
|Walking on wool no longer causes vibrations.|
|Throwing wool as an item onto the ground no longer causes vibrations.|
|Sculk sensors are now silent while waterlogged.|
|Upcoming Bedrock Edition|
|1.16.210||beta 126.96.36.199||Added sculk sensor. It is using a different texture then the one in Java edition.|
|Wool Occlusion has not yet been implemented to the sculk sensors.|
- "Sculk" is derived from "skulk," meaning "keep out of sight, typically with a sinister or cowardly motive".
- There are two unused textures, "calibrated_sculk_sensor_top.png" and "calibrated_sculk_sensor_side.png," which were added in 20w49a. Notably, these are derivatives of the block of amethyst texture, potentially implying a planned connection; these could however be placeholder textures.
- Many of the sounds, most notably the "Block Broken", "Starts Clicking", and "Stops Clicking" noises have a similar sound to the noises made by Soul Sand and Soul Soil.
- – Works As Intended
- "While not related, Sculk name was inspired by Jeb's process with naming the Shulkers - he liked the word "Lurker", but changed it around a bit to feel new. Sculk is only one letter changed of Skulk, meaning 'keep out of sight, typically with a sinister or cowardly motive'" – @kingbdogz