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Sensors

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Desktop versionConsole version Desktop/Console-Only Content: This information applies only to the Desktop and Console 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.gif
Stack digit 9.pngStack digit 9.pngStack digit 9.png
Statistics
TypeFurnitureMechanism
PlaceableYes
Dimensions1 wide × 1 high
Use time14 Very Fast
RarityRarity Level: 1

A Sensor is a Hardmode mechanism that emits a signal under specific circumstances. Currently, there are 7 different types of sensors. There are 2 sub-categories of sensors. There are Logic Sensors, and there are Liquid Sensors.

There are 3 different Logic Sensors:

  • Logic Sensor(Day) which emits a signal when night turns to day.
  • Logic Sensor(Night) which emits a signal when day turns to night.
  • Logic Sensor(Player Above) which emits a signal when a player enters the area above it, and emits another when the player leaves the area above it.

There are 4 different Liquid Sensors:

  • Liquid Sensor(Water) which emits a signal when submerged in water, deactivates otherwise.
  • Liquid Sensor(Lava) which emits a signal when submerged in lava, deactivates otherwise.
  • Liquid Sensor(Honey) which emits a signal when submerged in honey, deactivates otherwise.
  • Liquid Sensor(Any) which emits a signal when submerged in any liquid, deactivates otherwise.

Crafting[edit | edit source]

Recipes[edit | edit source]

ResultIngredientsCrafting station
Liquid Sensor (Any)Liquid Sensor (Any)Desktop Version
Internal Item ID: 3729
Mythril AnvilMythril Anvil
or
Orichalcum AnvilOrichalcum Anvil
Liquid Sensor (Honey)Liquid Sensor (Honey)Desktop Version
Internal Item ID: 3728
Liquid Sensor (Lava)Liquid Sensor (Lava)Desktop Version
Internal Item ID: 3727
Liquid Sensor (Water)Liquid Sensor (Water)Desktop Version
Internal Item ID: 3726
Logic Sensor (Day)Logic Sensor (Day)Desktop Version
Internal Item ID: 3613
Logic Sensor (Night)Logic Sensor (Night)Desktop Version
Internal Item ID: 3614
Logic Sensor (Player Above)Logic Sensor (Player Above)Desktop Version
Internal Item ID: 3615
total: 7 row(s)

Player Above Sensor[edit | edit source]

It has a 5 blocks wide and 10 blocks tall detection zone, although it is actually about 1-2 pixels bigger than that.

When a player moves into the zone, it sends a signal. When a player exits the zone, it also sends a signal.

Note : In multiplayer, if one player moves into the zone, and then another enters the same zone while the first player is still in the zone, the sensor will not send another signal, making it useful for automatic doors in multiplayer (where multiple players may pass the same door). The Player Above sensor will also trigger on the position of dead players until they respawn, which should be considered during Expert mode planning in particular.

History[edit | edit source]