Sculk Sensor

Sculk Sensor

Renewable	No
Stackable	Yes (64)
Tool
Blast resistance	1.5
Hardness	1.5
Luminant	Yes (1)
Transparent	Yes
Flammable	No
Catches fire from lava	No

The sculk sensor is a block that can detect vibrations and emit a redstone signal.

Obtaining

Sculk sensors can currently be obtained only from the creative inventory or commands.

Breaking

Sculk sensors can be mined with any tool, but hoes are the quickest.

Block	Sculk Sensor
Hardness	1.5
Tool
Breaking time
Default	2.25
Wooden	1.15
Stone	0.6
Iron	0.4
Diamond	0.3
Netherite	0.25
Golden	0.2

Usage

Light

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.

Vibration detection

The sculk sensor vibration particle.

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.

Redstone emission

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.

Vibration frequencies

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
1	Step	minecraft:step	An entity walks
2	Flap	minecraft:flap	A flying entity (e.g. a bat) flaps its wings
3	Swim	minecraft:swim	Entity swimming
4	Elytra Free Fall	minecraft:elytra_free_fall	Dives down with an elytra
5	Hit Ground	minecraft:hit_ground	An entity falls from a higher place
6	Splash	minecraft:splash	An entity floats up
	Wolf Shaking	minecraft:wolf_shaking	A wolf shakes off water after getting wet
7	Projectile Shoot	minecraft:projectile_shoot	A projectile is fired
8	Projectile Land	minecraft:projectile_land	A projectile hits something
	Eating Finish	minecraft:eating_finish	Player finishes eating
	Entity Hit	minecraft:entity_hit	An entity is damaged
9	Armor Stand Add Item	minecraft:armor_stand_add_item	A piece of equipment is added to an armor stand
10	Block Close	minecraft:block_close	A door, trapdoor, or fence gate closes
	Block Unswitch	minecraft:block_unswitch	A lever is turned off
	Block Unpress	minecraft:block_unpress	A button reverts back to its unpressed state
	Block Detach	minecraft:block_detach	A tripwire is defused
	Dispense Fail	minecraft:dispense_fail	A dispenser fails to dispense an item
11	Block Open	minecraft:block_open	A door, trapdoor, or fence gate opens
	Block Switch	minecraft:block_switch	A lever is turned on
	Block Press	minecraft:block_press	A button is pressed
	Block Attach	minecraft:block_attach	A tripwire is set
12	Block Place	minecraft:block_place	A block is placed
	Fluid Place	minecraft:fluid_place	A fluid is dumped out of a bucket
	Flint And Steel Use	minecraft:flint_and_steel_use	Flint and steel is used
13	Block Destroy	minecraft:block_destroy	A block is destroyed
	Fluid Pickup	minecraft:fluid_pickup	A fluid is scooped up in a bucket
14	Fishing Rod Reel-In	minecraft:fishing_rod_reel_in	A player reels in a fishing rod
	Container Close	minecraft:container_close	A container closes
	Piston Contract	minecraft:piston_contract	A piston contracts
15	Fishing Rod Cast	minecraft:fishing_rod_cast	A player casts a fishing rod
	Container Open	minecraft:container_open	A container (e.g. a chest) opens
	Explode	minecraft:explode	Something explodes
	Lightning Strike	minecraft:lightning_strike	Lightning strikes
	Piston Extend	minecraft:piston_extend	A piston extends

Sounds

Java Edition:

Sound	Subtitle	Source	Description	Namespaced ID	Translation key	Volume	Pitch	Attenuation distance
	Block broken	Blocks	Breaking the block	block.sculk_sensor.break	subtitles.block.generic.break	?	?	?
	Sculk Sensor starts clicking	Blocks	Plays when sculk sensor is activated	block.sculk_sensor.clicking	subtitles.block.sculk_sensor.clicking	?	?	?
	Sculk Sensor stops clicking	Blocks	Plays when sculk sensor is deactivated	block.sculk_sensor.clicking_stop	subtitles.block.sculk_sensor.clicking_stop	?	?	?
	None	Blocks	Falling on the block with fall damage	block.sculk_sensor.fall	None	?	?	?
	Block breaking	Blocks	Mining the block	block.sculk_sensor.hit	subtitles.block.generic.hit	?	?	?
	Block placed	Blocks	Placing the block	block.sculk_sensor.place	subtitles.block.generic.place	?	?	?
	Footsteps	Blocks	Walking on the block	block.sculk_sensor.step	subtitles.block.generic.footsteps	?	?	?

Data values

ID

Java Edition:

Name	Namespaced ID	Translation key
Sculk Sensor	sculk_sensor	block.minecraft.sculk_sensor

Bedrock Edition:

Name	Namespaced ID	Numeric ID	Translation key
Sculk Sensor	sculk_sensor	?	tile.sculk_sensor.name

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	cooldown	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 the sculk sensor.

History

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 1.16.210.56			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.

Issues

Issues relating to "Sculk Sensor" are maintained on the bug tracker. Report issues there.

Trivia

• "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.

Gallery

• 

  Sculk sensor when active.

• 

  Sculk sensor when inactive.

References

Redstone

View at: Template:Redstone/content [edit]

Blocks

View at: Template:Blocks/content [edit]