Calibrated Sculk Sensor
Craftable 1.20 sculk sensor variant that only detects vibrations on the specific frequency set by a comparator input, enabling precise redstone filtering without noise.
Description
This selective detection makes it a powerful tool for complex redstone circuits. A calibrated sensor watching a door will only fire for door-open events (frequency 10), ignoring footsteps from passing players (frequency 1). Combined with observers, comparators, and clock circuits, it enables event-driven automation: alarms that trigger only on explosions (15), doors that open when a player eats (8), or traps keyed to block placement (13). Each Calibrated Sculk Sensor still requires a plain sculk sensor plus three amethyst shards, so plain sculk sensors remain the bottleneck.
Block properties
| Item ID |
minecraft:calibrated_sculk_sensor
|
|---|---|
| /give command |
/give @p minecraft:calibrated_sculk_sensor
|
| Stackable | Yes (64) |
| Best tool | Hoe |
| Renewable | Yes |
| Hardness | 1.5 |
| Blast resistance | 1.5 |
| Light level | 1 |
| Java Edition | 1.20 |
| Bedrock Edition | 1.20.0 |
Java Edition 1.20
How to Use Calibrated Sculk Sensor
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1
Craft the Calibrated Sculk Sensor
Open a 3x3 crafting grid. Place one Sculk Sensor in the center, then put one Amethyst Shard to the left, one to the right, and one above it. The Calibrated Sculk Sensor cannot be found naturally — crafting is the only way to obtain it.
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2
Place and Identify the Input Side
Place the Calibrated Sculk Sensor on any surface. Find the face covered with amethyst crystals — that is the input side where you apply the frequency-setting redstone signal. Every other face emits the output signal when a matching vibration is detected.
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3
Set the Detection Frequency
Connect a redstone signal of strength 1 to 15 to the input side using a lever, comparator, or any redstone source. Each strength value filters a specific vibration frequency: 1 = movement (footsteps, swimming, wing flaps), 2 = projectile landings and splashes, 3 = item interactions, 8 = eating and drinking, 10 = block activation (doors, buttons, note blocks), 13 = block placement, 15 = explosions and deaths.
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4
Wire the Output to Your Circuit
The output emits a redstone signal when a matching vibration occurs within 16 blocks — twice the range of a plain Sculk Sensor. The output strength equals the detected vibration's frequency, not the distance to the source. Connect any non-amethyst face to a comparator, piston, door, or other redstone component.
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5
Dampen Unwanted Vibrations with Wool
Place wool blocks between the sensor and any vibration sources you want to block. Wool absorbs vibrations and prevents the sensor from detecting events in that direction. This lets you create directional filters so only specific pathways trigger the circuit.
Crafting is the only way to obtain a Calibrated Sculk Sensor, but breaking a placed one requires a Silk Touch tool to drop the block — without Silk Touch it yields only 5 experience. Any tool breaks it, hoes fastest. Amethyst Shards come from Amethyst Clusters inside Amethyst Geodes, which generate between Y=-58 and Y=30.
How to craft this block
Frequently asked questions
What is the Calibrated Sculk Sensor used for?
The Calibrated Sculk Sensor filters vibrations by type, allowing redstone circuits to react to only one specific event — such as opening a door, a projectile landing, or an explosion — while ignoring all other noise. It is the primary tool for event-driven redstone automation in Minecraft Java Edition 1.20+.
What is the difference between a Sculk Sensor and a Calibrated Sculk Sensor?
A regular Sculk Sensor reacts to every vibration within 8 blocks, outputting a signal for any game event. The Calibrated Sculk Sensor doubles the range to 16 blocks and adds a redstone input side that sets a frequency (1–15), so it only triggers when the chosen event type occurs. This eliminates false positives from footsteps or ambient noise.
How do you set the detection frequency?
Apply a redstone signal of strength 1 to 15 to the input side (the amethyst-crystal face) of the Calibrated Sculk Sensor using a lever, comparator, or any redstone source. Strength 1 = footsteps, 10 = block activation (doors, buttons, levers), 15 = explosion. Changing the input instantly changes the detected event type.
What vibration events correspond to each frequency?
Frequencies map to: 1 = step, swim, flap; 2 = projectile land, splash; 3 = item interact, projectile shoot, instrument play; 4 = elytra glide, unique mob actions, unequip; 5 = entity dismount, equip; 6 = entity mount, entity interact; 7 = entity damage; 8 = drink, eat; 9 = block deactivate (door close, chest close); 10 = block activate (door open, button press, note block play); 11 = block change; 12 = block destroy; 13 = block place; 14 = entity place, lightning strike, teleport; 15 = entity die, explode.
How far does the Calibrated Sculk Sensor detect vibrations?
The Calibrated Sculk Sensor detects vibrations within a 16-block radius in all directions. The output signal strength equals the frequency of the detected vibration (1 to 15), regardless of distance to the source. Wool blocks placed between the sensor and a source absorb vibrations and block detection from that direction.
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