Sculk Sensor

The sculk sensor is a block that detects vibrations caused by actions and events, and emits 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.

Usage
Detecting movement from an entity nearby.

Light
An inactive sculk sensor has an inconspicuous light level of 1. However, when active, it emits a brighter yellowish light that illuminates its surroundings.

Vibration detection
Sculk sensors can detect vibrations in an 8 block radius around it. A vibration is caused by many noisy events, such as a player gliding with elytra, a piston extending or a wet wolf shaking itself off. While sneaking, a player is not detected when walking, falling, or shooting a projectile.

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 40 game tick. The sensor cannot detect any other vibrations while a signal is traveling to it, nor while activated.

Sculk sensors have a cooldown period of 1 tick after being placed or after deactivating. During this short cooldown period, they cannot detect vibrations. This prevents them from activating when a contraption it is powering is being unpowered.

Sculk sensors don't detect vibrations from other sculk sources.

Wool has a special interaction with sculk sensors. If a wool block is between a sensor and a vibration source, then that sensor is not able to detect the vibration. In addition, sensors are not able to detect walking on wool or throwing wool on the ground.

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.

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

ID




Trivia

 * "Sculk" is derived from "skulk," meaning "keep out of sight, typically with a sinister or cowardly motive".