Sculk Sensor — Minecraft block

Sculk Sensor

Sculk Sensor detects vibrations within 8 blocks and outputs a redstone signal — wireless redstone, mufflable with wool.

Block ID minecraft:sculk_sensor
Mod Vanilla
Game versions
1.21

Description

Sculk Sensor introduced wireless redstone to vanilla Minecraft for the first time. The block listens for vibration events — footsteps, block breaking and placing, doors opening, projectile impacts, mobs swimming, and dozens more — within an eight-block spherical radius, then emits a redstone signal whose strength varies by event type. Walking nearby produces a small signal of three or four; breaking a glass block produces a larger one. Each detection registers visibly with a brief cyan glow ring around the sensor.

Wool blocks are the universal countermeasure: any wool placed between the source of a vibration and the sensor blocks the signal entirely, allowing players to construct silent corridors near deep dark biomes. The block is craftable from one calibrated recipe (sculk sensor surrounded by amethyst shards on a crafter), allowing inputs to be filtered to specific frequencies in the calibrated variant. In the deep dark biome itself, sculk sensors trigger nearby sculk shriekers — and that chain summons the warden after enough activations.

Java & Bedrock Guide

How to find and use a Sculk Sensor in Minecraft

  1. 1

    Locate the deep dark

    Sculk Sensor generates only in the deep dark biome, usually found deep underground below Y=0 and inside ancient cities. Travel down a cave or ravine until the walls turn dark blue with sculk growth.

  2. 2

    Mine it with Silk Touch

    Break the Sculk Sensor with a Silk Touch tool to collect the block itself; a hoe is the fastest tool. Without Silk Touch the sensor drops 5 experience instead of the block.

  3. 3

    Place and read the redstone output

    Put the Sculk Sensor down and connect redstone dust to it. When a vibration occurs within 8 blocks, the Sculk Sensor emits a signal whose strength (1-15) depends on the vibration frequency, then enters a short cooldown.

  4. 4

    Muffle unwanted vibrations with wool

    Place wool or carpet around or between the source and the Sculk Sensor to block specific vibrations, so the sensor only reacts to the events you want.

  5. 5

    Upgrade to a Calibrated Sculk Sensor

    Surround one Sculk Sensor with 3 amethyst shards on a crafting table to make a Calibrated Sculk Sensor, which filters detection to a single frequency set by a redstone input on its back.

Version note

Sculk Sensor was added in Minecraft 1.19 (The Wild Update) after an experimental 1.17 release, and works the same in Java and Bedrock Edition.

Used in crafts

Related blocks

Frequently asked questions

Can you craft a Sculk Sensor in Minecraft?

No. The Sculk Sensor has no crafting recipe — it only generates naturally in the deep dark biome. Mine it with a Silk Touch tool to collect the block itself.

How far does a Sculk Sensor detect vibrations?

A Sculk Sensor detects vibrations within an 8-block spherical radius and outputs a redstone signal of 1-15 depending on the vibration frequency.

How do you stop a Sculk Sensor from detecting?

Place wool or carpet between the vibration source and the Sculk Sensor. Wool absorbs vibrations completely, letting you create silent zones nearby.

Does a Sculk Sensor summon the Warden?

Not directly. The Sculk Sensor triggers nearby sculk shriekers, and after enough shrieks in the deep dark those shriekers summon the Warden.

What version added the Sculk Sensor?

The Sculk Sensor was added in Minecraft 1.19 (The Wild Update), after first appearing experimentally in the 1.17 Caves & Cliffs update. It works in both Java and Bedrock Edition.

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