Sensors

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Desktop version Console version Mobile version
Desktop/Console/Mobile-Only Content: This information applies only to the Desktop, Console, and Mobile 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.pngStack digit 9.png
Statistics
Type
FurnitureMechanism
Placeable✔️ (1 wide × 1 high)
Use time15 (Very fast)
RarityRarity level: 1
Research5 required
  • Internal Item ID: 3613–3615, 3726–3729 (Desktop, Console and Mobile versions)
  • Internal Tile ID: 423

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

Crafting

Recipes

ResultIngredientsCrafting station
Liquid Sensor (Any)Liquid Sensor (Any)(Desktop, Console and Mobile versions)Mythril AnvilMythril Anvil
or
Orichalcum AnvilOrichalcum Anvil
Liquid Sensor (Honey)Liquid Sensor (Honey)(Desktop, Console and Mobile versions)
Liquid Sensor (Lava)Liquid Sensor (Lava)(Desktop, Console and Mobile versions)
Liquid Sensor (Water)Liquid Sensor (Water)(Desktop, Console and Mobile versions)
Logic Sensor (Day)Logic Sensor (Day)(Desktop, Console and Mobile versions)
Logic Sensor (Night)Logic Sensor (Night)(Desktop, Console and Mobile versions)
Logic Sensor (Player Above)Logic Sensor (Player Above)(Desktop, Console and Mobile versions)

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.
  • The Player Above sensor cannot activate Teleporters; any logic updates which are triggered by a Player Above sensor will not activate teleporters regardless of the mechanisms it passes through. Previously, this could be bypassed using an intermediate Logic Gate.
  • The Water Sensor will also activate when in contact with Shimmer.
  • 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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