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Desktop/Console/Mobile/Switch/tModLoader-Only Content: This information applies only to the Desktop, Console, Mobile, Switch, and tModLoader versions of Terraria.
Sensors
  • Logic Sensor (Day).png Logic Sensor (Night).png Logic Sensor (Player Above).png

    Liquid Sensor (Water).png Liquid Sensor (Lava).png Liquid Sensor (Honey).png Liquid Sensor (Any).png

  • Sensors placed
Auto-use
Stack digit 9.pngStack digit 9.pngStack digit 9.png
Statistics
Type
Placeable✔️ (1 wide × 1 high)
Use time15 (Very fast)
RarityRarity level: 1
Research5 required

Sensors are Hardmode mechanisms that emit a signal under specific circumstances. There are 7 different types of sensors, split into 2 sub-categories: Logic Sensors and Liquid Sensors.

Types[]

Sensor Tooltip
Logic Sensor (Day) Logic Sensor (Day)
Internal Item ID: 3613
Activates once day starts
Logic Sensor (Night) Logic Sensor (Night)
Internal Item ID: 3614
Activates once night starts
Logic Sensor (Player Above) Logic Sensor (Player Above)
Internal Item ID: 3615
Activates whenever players are over it, deactivates otherwise
Liquid Sensor (Water) Liquid Sensor (Water)
Internal Item ID: 3726
Activates whenever occupied by water, deactivates otherwise
Liquid Sensor (Lava) Liquid Sensor (Lava)
Internal Item ID: 3727
Activates whenever occupied by lava, deactivates otherwise
Liquid Sensor (Honey) Liquid Sensor (Honey)
Internal Item ID: 3728
Activates whenever occupied by honey, deactivates otherwise
Liquid Sensor (Any) Liquid Sensor (Any)
Internal Item ID: 3729
Activates whenever occupied by liquid, deactivates otherwise

Crafting[]

Recipes[]

ResultIngredientsCrafting station
Liquid Sensor (Any)Liquid Sensor (Any)Mythril AnvilMythril Anvil
or
Orichalcum AnvilOrichalcum Anvil
Liquid Sensor (Honey)Liquid Sensor (Honey)
Liquid Sensor (Lava)Liquid Sensor (Lava)
Liquid Sensor (Water)Liquid Sensor (Water)
Logic Sensor (Day)Logic Sensor (Day)
Logic Sensor (Night)Logic Sensor (Night)
Logic Sensor (Player Above)Logic Sensor (Player Above)
total: 7 row(s)

Notes[]

  • The Player Above sensor detects players in a 5×10-tile area above the sensor, which is outlined while placing it. In multiplayer, it will not send another signal if a player enters the detection zone while another player is already in it.
    • Due to this, it is a viable and multiplayer-friendly alternative to Pressure Plate powered automatic doors.
    • It will not trigger if placed while the player is inside the detection area. Instead, it will trigger upon leaving the detection zone.
    • Dead players or Hardcore Ghosts will trigger the detector.
  • Rain can not trigger Water Sensors.

History[]

  • Desktop 1.4.2: Dead players and Hardcore ghosts will no longer trigger Player Above sensors.

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