Sculk Sensor

Sculk Sensor
Renewable	Yes
Stackable	Yes (64)
Tool
Blast resistance	1.5
Hardness	1.5
Luminous	Yes (1)
Transparent	Yes
Waterloggable	Yes
Flammable	No
Catches fire; from lava	No
Map color (JE)	; 23 COLOR_CYAN

The sculk sensor is a block in the sculk family. It detects vibrations caused by actions and events in a radius around it and emits a redstone signal, and, if it was triggered by a player, also activates nearby sculk shriekers. Players can sneak to avoid making vibrations and wool can be used to occlude and block them.

Obtaining

Breaking

A sculk sensor can be mined with any tool, but hoes are the quickest. It drops itself only if mined with any tool enchanted with Silk Touch. If mined with a non-Silk Touch tool, it drops 5 experience instead.

Block
Hardness	1.5
Tool
Breaking time (sec)^[A]
Default	2.25
Wooden	1.15
Stone	0.6
Copper	0.45
Iron	0.4
Diamond	0.3
Netherite	0.25
Golden	0.2
Options
Efficiency	000
Haste	001 1JEBE

Legend

incorrect tool, drops nothing
correct tool, drops nothing or something other than the block itself
correct tool, drops the block itself
italicized can be instant mined

↑ These durations ignore other influential factors (e.g. Mining Fatigue), and are measured in seconds. For more information, see Breaking § Speed.

Natural generation

Sculk sensors generate within the deep dark biome and ancient cities.

Generated loot

Item	Structure	Container	Quantity	Chance
Java Edition and Bedrock Edition
	Ancient City	Chest	1–3	23.2% { "item": "Sculk Sensor", "stacksize": "1–3", "chance": 0.23238142813184637, "structure": "Ancient City", "container": "Chest" }

Post-generation

A sculk catalyst has a 9% chance of generating a sculk sensor on top of a sculk block.

Usage

Crafting ingredient

Sculk sensors can be used to craft calibrated sculk sensors.

Name	Ingredients	Crafting recipe
Calibrated Sculk Sensor	Amethyst Shard +

Light

A sculk sensor has a light level of 1. When active, it changes to a lighter block state without a change to the light level.

Vibration detection

Sculk sensors detect vibrations in an 8 block spherical radius around it. Vibrations are caused by various events, such as players and mobs walking, placing or breaking blocks (except wool or carpet, gliding with elytra, items falling on the ground, shooting projectiles, a piston extending or a wet wolf shaking itself off). Vibrations have an associated frequency; different events create vibrations of different frequencies.

When a vibration is made within the range of a sculk sensor, a signal travels from the vibration source to the sensor at a speed of one block per game tick (20 blocks per second). When the signal arrives, the sensor is activated for 30 game ticks (1.5 seconds). The sensor cannot detect any other vibrations while activated or while a signal is traveling to it.

Sculk sensors have a cooldown period of 10 game ticks (0.5 seconds) after being placed or after deactivating. During this cooldown period, they cannot detect vibrations. This prevents a sensor from reactivating when a contraption it is powering (such as a piston) becomes unpowered.

Sculk sensors don't detect vibrations from other sculk sources or the warden in Java Edition.

Sneaking

While sneaking, a player is not detected while performing most actions corresponding to vibration frequencies 1, 2, or 3, such as moving, hitting the ground without taking damage, interacting with items, and shooting projectiles (although the projectile itself creates a vibration when it hits the ground).

Wool occlusion

Wool and carpets have a special interaction with sculk sensors. If a wool block is placed between a sensor and a vibration source, the sensor is not able to detect the placed wool nor vibrations behind it. Specifically, if the ray joining the cube centers of the sensor block and the vibration source passes through any wool blocks, the vibration is occluded. If the ray passes diagonally through the edge between two blocks, either one or the other block may occlude it but not both. Sculk sensors are not able to detect footsteps or dropped items on wool or carpet, placement or breaking of wool or carpet, or wool or carpets dropping as items.

Sculk shriekers

Sculk sensors pass on the vibrations made by players to sculk shriekers within 8 blocks of the sensor. For example, an item dropped by a player triggers the shrieker, but an item dropped by a dispenser or from a broken block does not; a player flying around with elytra triggers the shrieker, but a bat flying around does not. Alarms can be blocked by wool placed in between the sensor and shrieker, similar to how wool can block vibrations from reaching the sensor itself.

Redstone emission

An activated Sculk Sensor. Only the block *below* the sensor is strongly powered. All other sides react as though the sensor itself were strongly powered.

Sculk sensors emit a redstone signal in every direction (including top and bottom) when they are activated. The redstone signal emitted from the bottom powers the block below the sensor strongly, whereas in all other directions it appears as though the sensor itself is the strongly powered block.

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. The distance is measured from the block at which the vibration occurred; moving within a block never results in a different strength.

redstone_strength = max(1, 15 - floor(15 / detection_range * distance))

Vibration frequencies

This section needs expansion.

You can help by expanding it.
Instructions: Bedrock Edition values

Each vibration in the game falls under a certain frequency value. This value can be measured with a comparator. With the right contraption, the player could detect if a certain action has occurred or is occurring nearby.

Output	Vibration type	Game event	Description
1	Step	`minecraft:step`	Player or entity steps
	Swim	`minecraft:swim`	Player or entity swims, boat paddles
	Flap	`minecraft:flap`	Entity flaps (bat)
	Resonate 1	`minecraft:resonate_1`
2	Projectile Land	`minecraft:projectile_land`	Projectile lands (snowball)
	Hit Ground	`minecraft:hit_ground`	Player or entity hits ground post-jump or fall
	Splash	`minecraft:splash`	Player or entity splashes. Entity enters water or bubble column
	Resonate 2	`minecraft:resonate_2`
3	Item Interact Finish	`minecraft:item_interact_finish`	Item interaction (shield, spyglass, bone meal)
	Projectile Shoot	`minecraft:projectile_shoot`	Projectile shoots (arrow, firework, etc.)
	Instrument Play	`minecraft:instrument_play`	Goat horn plays
	Resonate 3	`minecraft:resonate_3`
4	Entity Action	`minecraft:entity_action`	Entity roars (ravager), entity shakes (wolf after swimming), villager holds item, sniffer digs, armadillo rolls up or unrolls, creaking stops or starts moving
	Elytra Glide	`minecraft:elytra_glide`	Player glides
	Unequip	`minecraft:unequip`	Armor unequip in armor slot or stand
	Resonate 4	`minecraft:resonate_4`
5	Entity Dismount	`minecraft:entity_dismount`	Player dismounts
	Equip	`minecraft:equip`	Armor equipped in armor slot or stand
	Resonate 5	`minecraft:resonate_5`
6	Entity Mount	`minecraft:entity_mount`	Player mounts (horse)
	Entity Interact	`minecraft:entity_interact`	Player interaction with entity (breeding)
	Shear	`minecraft:shear`	A sheep, mooshroom, or bogged being sheared
	Resonate 6	`minecraft:resonate_6`
7	Entity Damage	`minecraft:entity_damage`	Damage to entities
7	Resonate 7	`minecraft:resonate_7`
8	Drink	`minecraft:drink`	Entity drinks
	Eat	`minecraft:eat`	Entity eats
	Resonate 8	`minecraft:resonate_8`
9	Container Close	`minecraft:container_close`	Container (chest, shulker box, hopper) closes
	Block Close	`minecraft:block_close`	Door, trapdoor, or fence gate closes
	Block Deactivate	`minecraft:block_deactivate`	Block deactivation (piston, button, lever, pressure plate)
	Block Detach	`minecraft:block_detach`	Tripwire detachment
	Resonate 9	`minecraft:resonate_9`
10	Container Open	`minecraft:container_open`	Container opens
	Block Open	`minecraft:block_open`	Door opens
	Block Activate	`minecraft:block_activate`	Block activation
	Block Attach	`minecraft:block_attach`	Attachment of tripwire hook
	Prime Fuse	`minecraft:prime_fuse`	TNT or creeper activates
	Note Block Play	`minecraft:note_block_play`	Note block sounds
	Resonate 10	`minecraft:resonate_10`
11	Block Change	`minecraft:block_change`	Block change (chiseled bookshelf, lectern, composter, decorated pot, etc.)
11	Resonate 11	`minecraft:resonate_11`
12	Block Destroy	`minecraft:block_destroy`	Block destruction
	Fluid Pickup	`minecraft:fluid_pickup`	Gathered fluid (water, honey bottle, powder snow)
	Resonate 12	`minecraft:resonate_12`
13	Block Place	`minecraft:block_place`	Block placement
	Fluid Place	`minecraft:fluid_place`	Fluid placement
	Resonate 13	`minecraft:resonate_13`
14	Entity Place	`minecraft:entity_place`	Entity placement via spawn-egg, mob spawner, or evoker magic
	Lightning Strike	`minecraft:lightning_strike`	Lightning strikes
	Teleport	`minecraft:teleport`	Endermen, chorus fruit, shulker teleportation
	Resonate 14	`minecraft:resonate_14`
15	Entity Die	`minecraft:entity_die`	Entity dies, firework finishes
	Explode	`minecraft:explode`	TNT, end crystal, bed/respawn anchor, or creeper explodes
	Resonate 15	`minecraft:resonate_15`

Vibration resonance

When a sculk sensor detects a vibration, any adjacent block of amethyst re-emits a vibration on the same frequency that the sculk sensor detected.

Things which are not detected

The following occurrences, despite presumably causing physical motion, do not produce vibrations and therefore cannot be detected:

Blocks destroyed by a fluid flowing into their space^[1]
Several blocks being destroyed due to their supporting block being removed:^[2]
- Rails
- Powered rails
- Detector rails
- Activator rails
- Redstone wire
- Redstone repeaters
- Redstone comparators
Several cases where a dispenser fails to perform an action:^[3]
- Flint and steel not creating fire
- Bone meal not growing something
- Heads and carved pumpkins, if not equipped on something or placed
- Shulker boxes, if not placed
- Shears, if there's nothing to shear
- Glowstone, if it doesn't charge a respawn anchor
Inserting an eye of ender into an end portal frame^[4]^[5]
Eyes of ender breaking^[6]
Silverfish entering blocks^[7]
Water and lava flowing into existing spaces, or drying up^[8]
Changing the mode of a redstone comparator^[9]
Changing the delay on a redstone repeater^[10]
Changing the shape of a single unit of redstone wire^[11]
Fire extinguished by rain^[12]

The following cases have been confirmed to be intentional:

Axolotls being bred via tropical fish buckets^[13]
Moss blocks replacing existing blocks^[14]

Piston interactivity

Sculk sensors are immovable. Pistons cannot push them, and sticky pistons cannot push or pull them. Slime blocks and honey blocks do not stick to sculk sensors and have no effect whether the slime block or honey block is being pushed or pulled.

Sounds

A sculk sensor is silent if waterlogged. It can still detect vibration, but does not produce sounds itself.

Generic

Java Edition:

v t e `sculk_sensor` sound type
Sound	Subtitles	Source	Description	Resource location	Translation key	Volume	Pitch	Attenuation distance
	Block broken	Blocks	Once the block has broken	`block.sculk_sensor.break`	`subtitles.block.generic.break`	0.9	0.96	16
	Block placed	Blocks	When the block is placed	`block.sculk_sensor.place`	`subtitles.block.generic.place`	0.8	0.96	16
	Block breaking	Blocks	While the block is in the process of being broken	`block.sculk_sensor.hit`	`subtitles.block.generic.hit`	0.25	0.5	16
	Something falls on a block	Entity-Dependent	Falling on the block with fall damage	`block.sculk_sensor.fall`	`subtitles.block.generic.fall`	0.5	0.75	16
	Footsteps	Entity-Dependent	Walking on the block	`block.sculk_sensor.step`	`subtitles.block.generic.footsteps`	0.15	1.0	16

Bedrock Edition:

v t e `sculk_sensor` sound type
Sound	Source	Description	Resource location	Volume	Pitch
	Blocks	Once the block has broken	`break.sculk_sensor`	0.8	0.8-1.0
	Blocks	When the block is placed	`place.sculk_sensor`	0.8	0.8-1.0
	Blocks	While the block is in the process of being broken	`hit.sculk_sensor`	0.35	0.5
	Players	Falling on the block with fall damage	`fall.sculk_sensor`	0.4	1.0
	Players	Walking on the block	`step.sculk_sensor`	0.17	1.0
	Players	Jumping from the block	`jump.sculk_sensor`	0.12	1.0
	Players	Falling on the block without fall damage	`land.sculk_sensor`	0.14	1.0

Unique

Java Edition:

v t e Sounds
Sound	Subtitles	Source	Description	Resource location	Translation key	Volume	Pitch	Attenuation distance
	Sculk Sensor clicks	Blocks	When a sculk sensor detects a vibration	`block.sculk_sensor.clicking`	`subtitles.block.sculk_sensor.clicking`	0.73	0.8-1.0	16
	Sculk Sensor stops clicking	Blocks	When a sculk sensor deactivates	`block.sculk_sensor.clicking_stop`	`subtitles.block.sculk_sensor.clicking_stop`	0.62	0.8-1.0	16
	Amethyst resonates	Blocks	When an amethyst block re-emits a vibration	`block.amethyst_block.resonate`	`subtitles.block.amethyst_block.resonate`	1.0	varies^{[sound 1]}	48

↑ Picks number from 0, 0, 2, 4, 6, 7, 9, 10, 12, 14, 15, 18, 19, 21, 22, or 24 using the vibration's signal strength, and applies $2^{\frac{n - 12}{12}}$ . It uses the same equation that note blocks do.

Bedrock Edition:

v t e Sounds
Sound	Source	Description	Resource location	Volume	Pitch
	Blocks	When a sculk sensor detects a vibration	`power.on.sculk_sensor`	0.73	0.8-1.2
	Blocks	When a sculk sensor deactivates	`power.off.sculk_sensor`	0.62	0.8-1.2
	Blocks	When an amethyst block re-emits a vibration	`resonate.amethyst_block`	3.0	varies^{[sound 1]}
None	None	Undefined sound event	`block.sculk_sensor.clicking`	1.0	0.73
None	None	Undefined sound event	`block.sculk_sensor.clicking_stop`	1.0	0.62

↑ Uses the same system as Java Edition.

Data values

ID

Java Edition:

Name	Identifier	Form	Translation key
Sculk Sensor	`sculk_sensor`	Block & Item	`block.minecraft.sculk_sensor`

Name	Identifier
Block entity	`sculk_sensor`

Bedrock Edition:

Name	Identifier	Numeric ID	Form	Item ID^{[i 1]}	Translation key
Sculk Sensor	`sculk_sensor`	`562`	Block & Giveable Item^{[i 2]}	Identical^{[i 3]}	`tile.sculk_sensor.name`

↑ ID of block's direct item form, which is used in savegame files and addons.
↑ Available with /give command.
↑ The block's direct item form has the same ID as the block.

Name	Savegame ID
Block entity	`SculkSensor`

Block states

Java Edition:

Name	Default value	Allowed values	Description
power	`0`	`0` `1` `2` `3` `4` `5` `6` `7` `8` `9` `10` `11` `12` `13` `14` `15`	The sculk sensor's current power level.
sculk_sensor_phase	`inactive`	`active` `cooldown` `inactive`	Whether or not the sculk sensor is active.
waterlogged	`false`	`false` `true`	Whether or not there's water in the same place as this sculk sensor.

Bedrock Edition:

Name	Metadata Bits	Default value	Allowed values	Values for Metadata Bits	Description
sculk_sensor_phase	Not Supported	`0`	`0` `1` `2`	`Unsupported`	The sculk sensor phase.

Block data

A sculk sensor has a block entity associated with it that holds additional data about the block.

Java Edition:

[NBT Compound / JSON Object]: Block entity data.
- Tags common to all block entities see Template:Nbt inherit/blockentity/template
- [Int] last_vibration_frequency: The frequency of the last vibration.
- [NBT Compound / JSON Object] listener: The vibration event listener for this sculk shrieker, sculk sensor, or calibrated sculk sensor.
  - [NBT Compound / JSON Object] event: Exists only if there is an incoming vibration.
    - [Float] distance: The distance between this vibration's source and the block.
    - [String] game_event: The resource location of the vibration event that caused the current incoming vibration.
    - [NBT List / JSON Array] pos: The coordinates of the source of this vibration.
      - [Double]: X coordinate.
      - [Double]: Y coordinate.
      - [Double]: Z coordinate.
    - [Int Array] projectile_owner: If the vibration was caused by a projectile, this is the UUID of the entity that launched the projectile. Does not exist if vibration was not caused by a projectile.
    - [Int Array] source: The UUID of the entity that caused the vibration. Does not exist if vibration was not caused by an entity.
  - [Int] event_delay: How many ticks remain until triggered by the vibration. Set to 0 if there is no incoming vibration
  - [NBT Compound / JSON Object] selector: The data of the vibration selector.
    - [Long] tick: The game time when the vibration occurs, or -1 if there is no vibration to choose from.
    - [NBT Compound / JSON Object] event: Candidate game event, with the same structure as the [NBT Compound / JSON Object] event tag above.

Bedrock Edition:

See Bedrock Edition level format/Block entity format.

Achievements


Icon		Achievement	In-game description	Actual requirements (if different)	Gamerscore earned	Trophy type (PS)
PS4	Other	Achievement	In-game description	Actual requirements (if different)	Gamerscore earned	Trophy type (PS)
		Sneak 100	Sneak next to a without triggering it	Sneak next to a Sculk Sensor or Warden without triggering or aggravating it.	10	Bronze

Advancements

Icon	Advancement	In-game description	Actual requirements (if different)
	Sneak 100	Sneak near a Sculk Sensor or Warden to prevent it from detecting you	Sneak within 8 blocks from a sculk sensor, or 16 blocks from a warden.

Video

History

2020 Prototypes for the sculk sensor are made, previously simply stepping on sculk would produce noise and alert the warden.

The sculk sensors were originally going to emit a redstone signal only after being triggered four times, visually shown by markings on its top that would light up each time.

October 3, 2020 The sculk sensor is shown off at Minecraft Live 2020.

Item model was without tendrils since they were an entity, similar to the book on the enchanting table.

November 13, 2020 The sculk sensor has a new texture and clicking animation in a tweet from Brandon Pearce.

Tendrils are no longer entities and merged to block model.

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.

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.

21w05a

Added the following game events:

Output	Vibration type
6	Minecart Moving, Ring Bell, Block Change
7	Drinking Finish, Prime Fuse
8	Mob Interact
9	Equip, Shear, Ravager Roar
12	Entity Place
13	Entity Killed
14	Shulker Close
15	Shulker Open

21w13a The two unused textures of the calibrated sculk sensor top and side have been removed.

21w19a Sculk sensors are now accessible only through commands.

1.18 Experimental Snapshot 1 Sculk sensors are now available in the Creative inventory.

21w37a Sculk sensors are once again accessible only through commands.

1.19 Deep Dark Experimental Snapshot 1 Sculk sensors now generate in the deep dark biome.

Sculk sensors now drop experience when mined without Silk Touch.

Sculk sensors now always activate when stepped on, even when sneaking.

Sculk sensors have been re-added to the Creative inventory.

22w15a Carpets, like wool blocks, now dampen the vibrations caused by their placing, breaking or dropping as items.

Carpets now also dampen the vibrations caused by running and jumping over them.

1.19.4

23w06a

Sculk sensors are now able to detect more actions included in several existing and new game events, such as:

block_change:
- Using shears on cave vines, kelp, twisting vines, and weeping vines.
- Picking an item from a cave vine or a lectern.
- Interacting with items placed on both types of item frames.
- Trampling farmland into regular dirt.
- Charging up a respawn anchor.
- Interacting with a composter.
block_place:
- Turtle and frogs laying eggs.
container_close:
- Closing a minecart with chest or a boat with chest.
entity_dismount (new game event, with signal 6):
- Dismount any passenger from any vehicle.
entity_interact:
- Dyeing a sheep.
- Attaching or removing a lead from an entity.
entity_mount (new game event, with signal 7):
- Mount any passenger to any vehicle.

1.19.4 Pre-release 1 The item_interact_finish event now has a vibration frequency of 2 instead of 14.

1.19.4 Pre-release 4 Sculk sensors are now activated upon breaking shulker bullets.

1.20 23w12a Sculk sensors can now be used to craft calibrated sculk sensors.

Vibration frequencies of many actions in the game have been tweaked and greatly simplified to prevent unwanted interference, as following:

Old output	Vibration type	Game event	Description
1	Step	`minecraft:step`	An entity walks on the ground or a minecart rolls^{[note 1]}
2	Flap	`minecraft:flap`	A flying entity (e.g. a bat) flaps its wings
2	Item Interact Finish	`minecraft:item_interact_finish`	A player reels in a fishing rod, stops blocking with a shield, finishes pulling back a bow or crossbow, throws a trident, or retracts a spyglass^{[note 1]}
3	Swim	`minecraft:swim`	Entity swimming^{[note 1]}
4	Elytra Glide	`minecraft:elytra_glide`	Glides with elytra
5	Hit Ground	`minecraft:hit_ground`	An entity or an item falls^{[note 1]}
5	Teleport	`minecraft:teleport`	An entity (e.g. an enderman) teleports
6	Block Change	`minecraft:block_change`	A book is placed on a lectern, a music disc is inserted into or ejected from a jukebox, an item is added to or removed from a flower pot, a campfire is filled with food^{[note 2]}, a candle is placed on a cake, a big dripleaf is tilted, a bell is rung, a daylight detector switches mode, a bee enters or exits a beehive, wax is added to or removed from a copper block, a log is stripped of its bark, grass is converted into farmland or a path, a berry bush is harvested, a candle or campfire is lit or extinguished
	Minecart Moving	`minecraft:minecart_moving`	Does not function currently^[15]
	Splash	`minecraft:splash`	An entity splashes in water, a boat is above a bubble column, or a boat paddles^{[note 3]}
	Entity Shake	`minecraft:entity_shake`	A wolf shakes off water after getting wet
	Note Block Play	`minecraft:note_block_play`	A note block emits a sound
7	Drink	`minecraft:drink`	A potion is finished drinking^{[note 4]}
	Prime Fuse	`minecraft:prime_fuse`	A TNT or a creeper begins exploding
	Projectile Shoot	`minecraft:projectile_shoot`	A projectile is fired^{[note 1]}
8	Entity Interact	`minecraft:entity_interact`	Giving a golden apple to a zombie villager with Weakness, healing a tamed wolf, healing an iron golem, a panda is given a food item, or most instances of successfully feeding an animal.
	Projectile Land	`minecraft:projectile_land`	A projectile hits something
	Eat	`minecraft:eat`	A slice of cake is eaten, a horse eats,^[17] a panda eats, an animal eats grass, or a player eats food.^{[note 5]}
	Entity Damage	`minecraft:entity_damage`	An entity is damaged or any entity except an armor stand is killed
9	Equip	`minecraft:equip`	An item is put on an armor stand, or armor is equipped (either through the use button, or from the inventory).
	Shear	`minecraft:shear`	Use shears to disarm a tripwire, carve a pumpkin, harvest honeycomb,^{[note 2]} remove a snow golem's pumpkin,^{[note 2]} remove wool from a sheep^{[note 2]}, or convert a mooshroom into a cow^{[note 2]}
	Entity Roar	`minecraft:entity_roar`	A ravager roars
10	Block Close	`minecraft:block_close`	A door, trapdoor, or fence gate closes
	Block Deactivate	`minecraft:block_deactivate`	A lever is turned off, or a button, tripwire, or pressure plate reverts to its unpressed state
	Block Detach	`minecraft:block_detach`	A tripwire is detached
	Dispense Fail	`minecraft:dispense_fail`	A dispenser fails to dispense an item. Does not work with droppers.
11	Block Open	`minecraft:block_open`	A door, trapdoor, or fence gate opens
	Block Activate	`minecraft:block_activate`	A lever is turned on, or a button, tripwire or pressure plate is activated
	Block Attach	`minecraft:block_attach`	A tripwire is set
12	Block Place	`minecraft:block_place`	A block is placed or powder snow is placed on the ground^{[note 6]}. Flint and steel or a fire charge is used to place fire on top of a flammable block
	Entity Place	`minecraft:entity_place`	An entity is spawned with an item, for example, a painting or a spawn egg^{[note 2]}
	Fluid Place	`minecraft:fluid_place`	Increasing the fluid level in a cauldron, including through weather and stalactites;^{[note 2]} placing a fluid using a bucket, not including powder snow^[18]^{[note 2]}^{[note 7]}^{[note 8]}
13	Block Destroy	`minecraft:block_destroy`	A block is destroyed^{[note 2]}, an enderman picks up a block^{[note 9]}, one of several turtle eggs on a block cracks
	Entity Die	`minecraft:entity_die`	An armor stand is killed^[19]
	Fluid Pickup	`minecraft:fluid_pickup`	Honey is harvested with a bottle, a fluid is picked up in a bucket,^{[note 2]} powder snow is picked up in a bucket,^{[note 2]} a glass bottle is filled with water or dragon's breath,^{[note 2]} or a fluid is removed from a cauldron^{[note 2]}
14	Container Close	`minecraft:container_close`	A chest, trapped chest, ender chest, barrel, shulker box, or shulker closes^{[note 10]}
14	Piston Contract	`minecraft:piston_contract`	A piston contracts
15	Container Open	`minecraft:container_open`	A chest, trapped chest, ender chest, barrel, shulker box, shulker, a minecart with a chest or hopper opens
	Piston Extend	`minecraft:piston_extend`	A piston extends
	Instrument Play	`minecraft:instrument_play`	A goat horn is played
	Explode	`minecraft:explode`	TNT, a creeper, or a firework rocket explodes
	Lightning Strike	`minecraft:lightning_strike`	Lightning strikes

Action	New frequency value
Movement in any medium (land, water, and air)	1
Landing on any surface (land or water)	2
Item interactions	3
Gliding with an elytra or unique mob actions (ravager roar, wolf shaking, etc)	4
Dismounting a mob or equipping gear	5
Mounting a mob or interacting with a mob	6
Mobs and players getting damaged	7
Consuming items (drinking and eating)	8
Blocks 'deactivating' (door close, chest close, button unpress, etc)	9
Blocks 'activating' (door open, chest open, button press, etc)	10
Blocks changing (cauldron water level rising, adding food to campfire, etc)	11
Blocks being destroyed	12
Blocks being placed	13
Mobs and players teleporting or spawning	14
Mobs and players dying or an explosion	15

↑ ^a ^b ^c ^d ^e Is ignored when sneaking.
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Also works with dispensers.
↑ Despite being an occurrence of splashing, sculk sensors do not detect fishing bobbers hooking a fish; this has been confirmed by Mojang to be intentional.^[16]
↑ Milk does not trigger any vibration, and honey and stews trigger the eating event. See MC-213937.
↑ Honey bottles and stews count as food for this case.
↑ This includes blocks placed by a dispenser or enderman.
↑ Using fish buckets to breed axolotls does not cause this vibration. This inconsistency is intentional.^[13]
↑ Replacing an existing fluid, in and out of a cauldron, does not trigger the event. See MC-213965.
↑ This does not include blocks broken by flowing water (MC-207410), nor redstone dust, redstone repeaters, redstone comparators or any type of rail being broken due to its supporting block being removed (MC-207411), nor the last slice of cake being eaten (MC-213968).
↑ Closing a minecart with a chest or with a hopper does not trigger this event. See MC-210707.

Sculk sensors now resonate their vibrations through amethyst.

23w14a The default redstone output for sculk sensors has been modified to be more reliable for distance calculations.

Sculk sensors now strongly power the block they are placed on.

Removed the cooldown state of sculk_sensor_phase block state.

23w16a If a vibration is scheduled to be received by a sculk sensor, it stays queued until all adjacent chunks are loaded and ticking. This prevents vibration resonance setups from breaking when unloading their chunks from a distance.

23w17a Sculk sensors now last 30 game ticks when in Active phase instead of 40.

Sculk sensors now last 10 game ticks when in Cooldown phase instead of 1.

23w18a Landing or jumping on the edge of wool no longer triggers sculk sensors.^[20]

Walking on the edge of blocks now properly triggers sculk sensors.^[21]

1.20.2 23w31a Witches drinking potions emit an entity_action vibration of frequency 4.

Turtles clearing away sand emit an entity_action vibration of frequency 4.

Camels dashing, standing up, or sitting down emit an entity_action vibration of frequency 4.

Totems of undying activating emit an entity_damage vibration of frequency 7.

23w32a Vibrations no longer risk being lost on simulation distance limit.

Unequipping items emits a new unequip vibration of frequency 4.

Chiseled bookshelves emit a block_change vibration of frequency 11 when receiving books from hoppers.

Turtle eggs cracking emit a block_change vibration of frequency 11.

Turtle eggs hatching emit a block_destroy vibration of frequency 12.

Using bone meal emits an item_interact_finish vibration of frequency 3.

Fire being doused by splash water bottles emits a block_destroy vibration of frequency 12.

Evokers evoking vexes or fangs emit an entity_place vibration of frequency 14.

Carrots being eaten by rabbits emit a block_change vibration of frequency 11.

Sweet berries being eaten by foxes emit a block_change vibration of frequency 11.

Camels eating cactus emit an eat vibration of frequency 8.

1.21 24w19a Frosted ice being placed by Frost Walker emits a block_place vibration of frequency 13.

1.21.4 24w45a Resin clump being placed by creaking heart emits a block_place vibration of frequency 13.

1.21.5 25w02a Attacking a creaking spawned by a creaking heart emits an entity_action vibration of frequency 4.

Bedrock Edition

1.16.210

Experiment

Caves and Cliffs

beta 1.16.210.56

Added the sculk sensor. It uses a different texture from the one in Java Edition.

sculk_sensor_redstone_signal particles are also different from the ones in Java Edition.

1.17.0

Experiment

Caves and Cliffs

beta 1.17.0.50

Sculk sensors can now detect walking vibrations below y=0.

1.17.10

Experiment

Caves and Cliffs

beta 1.17.10.20

Texture changed to match Java Edition. But not the animation.

1.18.0 beta 1.18.0.20 Sculk sensors are now available outside experimental gameplay.

1.18.0

Experiment

Vanilla Experiments

beta 1.18.0.22

Sculk sensors have been moved behind the "Vanilla Experiments" Experimental Gameplay toggle.

Sculk sensors are now broken faster with a hoe.

1.18.10

Experiment

Wild Update

beta 1.18.10.21

Sculk sensors have been moved behind the "Wild Update" Experimental Gameplay toggle.

1.18.30

Experiment

Wild Update

Preview 1.18.30.23

Added wool occlusion to sculk sensors.

Sculk sensors no longer make clicking sounds if they are waterlogged.

Preview 1.18.30.29 Sculk sensors now generate in the deep dark biome.

1.19.0 Preview 1.19.0.21 Added more game events to match Java Edition.

Sculk sensors now always activate when stepped on, even when sneaking.

Sculk sensors are now available without enabling experimental gameplay again.

Preview 1.19.0.25 Sculk sensors now drop experience when mined without Silk Touch.

1.20.10

Preview 1.20.10.20

Sculk sensors can now detect the following events:

Placing, rotating, or removing an item in an item frame or a glow item frame.
Charging a respawn anchor.
Scraping or applying wax to blocks of the copper block set.
Switching a daylight detector to an inverted daylight detector or vice-versa.
Adding food to a campfire.
Adding or removing a music disc to a jukebox.
Mud turning into clay.
Harvesting sweet berries.
Placing an eye of ender in an end portal frame.
Bees entering or exiting a beehive or a bee nest.
Interacting with composter.
Attaching or detaching a lead from a fence.
Attaching or detaching a lead from a mob.
Dying a sheep.
Picking glow berries.
Farmland turning into dirt.
Using a spawn egg on a monster spawner.
Silverfish merging with blocks.
Using a hoe on rooted dirt.
Using a shovel to create dirt paths.
Placing a door.
Planting seeds in farmland.

1.20.30

Preview 1.20.30.20

Sculk sensors can now detect the following events:

Throwing an eye of ender.
Minecarts, consistently when moving on rails while empty.
Collecting fish, axolotls, and tadpoles with buckets.
Cleaning items in cauldrons.
Dying leather armor in cauldrons.
Tipping arrows in cauldrons.
Using dyes to change cauldrons' water color.
Non-player actors event when equipping shields in their off-hand slot.

Preview 1.20.30.21

Sculk sensors can now detect the following events:

Applying a name tag.
Evokers summoning vexes or fangs.
Chickens, frogs, and turtles laying eggs.
Using bone meal.
Chiseled bookshelves when books are inserted into them using hoppers.
Extinguishing fire.
Mounting or dismounting a vehicle.
Rabbits eating carrot crops.
Foxes eating sweet berry bushes.
Unequipping armor.
Placing a banner, bamboo sapling, lily pad, or a head.
Placing frogspawns.
Placing or adding sea pickles.
Adding/destroying a turtle egg.
Turtle eggs cracking.

1.21.60 Preview 1.21.60.21 Resin clump being placed by creaking heart emits a block_place vibration of frequency 13.

Issues

Issues relating to "Sculk Sensor" are maintained on the bug tracker. Issues should be reported and viewed there.

Trivia

"Sculk" is derived from "skulk", meaning "keep out of sight, typically with a sinister or cowardly motive".^[22]
In one of the early "hollowed" concepts of the sculk sensor, it used to require 4 vibrations before it would emit a redstone signal, indicated by the markings on the top texture, which would light up for each vibration received and would slowly go down over time.^[23]