CALIBRATED SCULK SENSOR
A sculk sensor with an amethyst shard filter. Accepts a redstone signal input to filter which vibration frequencies it detects. Only triggers on the specified frequency.
Crafting Recipe
1 Sculk Sensor + 3 Amethyst Shards → 1 Calibrated Sculk Sensor
Signal Behavior
Input
InputVibrations matching the calibrated frequency
Output
OutputSignal strength 15 when matching vibration detected
Max Signal Strength
Max Signal Strength15
Delay
DelayVibration travel time + 2 game ticks
Modes
- Filtered by input signal strength (1-15 = frequency)
Overview: what the Calibrated Sculk Sensor is and does
A sculk sensor with an amethyst shard filter. Accepts a redstone signal input to filter which vibration frequencies it detects. Only triggers on the specified frequency.
As a power source it sits at the start of a circuit, generating the signal that everything downstream reacts to. It is the filtered upgrade of the sculk sensor, letting you pick exactly one vibration frequency to react to.
The Calibrated Sculk Sensor was added to Minecraft in 1.20 and everything described here reflects its behaviour in Java Edition 1.21.
How it works: the redstone mechanics
On the input side, vibrations matching the calibrated frequency. On the output side, signal strength 15 when matching vibration detected.
Feeding a redstone signal of strength 1-15 into its side input tells it which single frequency to listen for, and it then fires signal 15 only on a matching vibration within its 9-block range. Every other vibration is ignored, which makes it far quieter than a plain sculk sensor.
Timing-wise, factor in vibration travel time + 2 game ticks when you wire it into a sequenced circuit.
It can output a maximum signal strength of 15, which travels 15 blocks through bare redstone dust before fading to nothing.
It operates in the following modes: filtered by input signal strength (1-15 = frequency).
How to set it up
- 1Craft the Calibrated Sculk Sensor: 1 Sculk Sensor + 3 Amethyst Shards → 1 Calibrated Sculk Sensor.
- 2Decide where the signal needs to start or land, then place the Calibrated Sculk Sensor against a solid surface so it can feed the rest of your circuit.
- 3Run redstone dust away from it toward the component you want to control, remembering the signal will fall by 1 per block.
- 4Test in a creative-mode plot first: trigger the input and confirm the Calibrated Sculk Sensor behaves exactly as the timing above predicts before committing it to a survival build.
Uses & applications
- ▸Frequency-specific detection
- ▸Advanced wireless systems
- ▸Event filtering
- ▸Selective mob detection
Tips & common mistakes
- !Must set input signal to define which frequency to detect
- !Only detects one frequency at a time
- !If you forget to set the input frequency it defaults to listening for nothing useful — always drive the calibration input to the frequency you want.
Calibrated Sculk Sensor FAQ
What is the Calibrated Sculk Sensor used for in Minecraft redstone?
The Calibrated Sculk Sensor is most often used for frequency-specific detection, advanced wireless systems, event filtering, and selective mob detection. As a power source it sits at the start of a circuit, generating the signal that everything downstream reacts to.
What signal strength does the Calibrated Sculk Sensor output?
Signal strength 15 when matching vibration detected. Its maximum signal strength is 15.
How do you craft the Calibrated Sculk Sensor?
1 Sculk Sensor + 3 Amethyst Shards → 1 Calibrated Sculk Sensor. It was introduced in 1.20.
Does the Calibrated Sculk Sensor add any delay to a circuit?
Yes — vibration travel time + 2 game ticks. Account for that timing when chaining it with other components, especially in clocks and fast doors.