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Detector Rail

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[edit]Detector Rail
DetectorRail.gif
Detector Rail
Type

Non-Solid Block

Physics

No

Transparency

Yes

Luminance

No

Blast resistance

3.5

Hardness

0.7

Tool

This block can be broken with any tool, but a pickaxe is the quickest

Renewable

Yes

Stackable

Yes (64)

Flammable

No

First appearance

Beta 1.5

Drops

Itself

Data value

dec: 28 hex: 1C bin: 11100

Name

detector_rail

A detector rail is a non-solid block which can transport minecarts and can be used as a switchable redstone power source.

Obtaining[edit]

Detector rails can be broken fairly easily by hand, but can be broken faster by using a pickaxe.

Crafting[edit]

Ingredients Crafting recipe

Iron Ingot +
Stone Pressure Plate +
Redstone

Iron Ingot
Iron Ingot Grid layout Arrow (small).png Detector Rail6
Iron Ingot Stone Pressure Plate Iron Ingot
Iron Ingot Redstone Iron Ingot

Usage[edit]

A detector rail can be used as a rail which can detect when minecarts are on it or how full container minecarts on it are.

Placement
To place a detector rail, use the "Use Item/Place Block" control (right-click, by default) on the face of a block adjacent to the destination space.
A detector rail can be attached to:
A detector rail cannot be attached to the side or bottom of any block, but attempting to make such an attachment may cause the detector rail to attach to the top of a block under the destination space. For example, if a fence is on the ground, attempting to attach a detector rail to the side of the fence will cause the detector rail to be attached to the top of the ground next to the fence instead.
When placed, a detector rail will configure itself to line up with any adjacent rails (including activator rails, powered rails, and other detector rails), as well as adjacent rails one block up. If there are two adjacent rails on non-opposite sides, or three or more adjacent rails, a detector rail will line up in the east-west direction. If there are no adjacent rails, a detector rail will line up in the north-south direction (but if a rail is later placed to the east or west, the detector rail will re-orient itself in the east-west direction even if it is already connected to another rail to the north or south). If a rail it would line up with is one block up, a detector rail will slant upwards towards it (with multiple options to slant upwards to, a detector rail "prefers", in order: west, east, south, and north). Other configurations can be created by placing and removing various rails.
Removal
To remove a detector rail, use the "Attack/Destroy" control (left-click, by default). Removing a detector rail by hand takes 1.05 seconds (or faster with a pickaxe) and it will drop itself as an item. A detector rail will also be removed and drop itself as an item:
  • if its attachment block is moved, removed, or destroyed
  • if water flows into the detector rail's space
  • if a piston tries to move it vertically, or if there is no valid attachment block at the new position after a horizontal move
If lava flows into a detector rail's space, the detector rail will be destroyed without dropping itself as an item.

Mobs will not try to walk across a detector rail (or other rails), but can be pushed onto them.

Rail[edit]

Detector rails (and other rails) act as "roads" for minecarts. A minecart that enters a detector rail's space from either end of the detector rail will continue to move, losing only a little velocity (which can then be increased again with powered rails). A minecart that enters a detector rail's space from the side will turn east or south (depending on the detector rail's orientation), or in the downward direction for a slanted detector rail.

Redstone component[edit]

Example for signal strength of a full minecart (27 stacks) and a half-full one (14 stacks)
See also: Redstone circuit

A detector rail activates when any minecart is on it (even if only a portion of the minecart is on it), and deactivates when no minecarts are on it. While active, a detector rail:

If the minecart on the detector rail is a minecart with chest or minecart with hopper, an adjacent redstone comparator facing away from the detector rail will output a power level proportional to the container's fullness instead, possibly power level 0.

Data values[edit]

A detector rail has the ID name minecraft:detector_rail and is further defined by its block data. A detector rail also has a block state which is expected to replace the functionality of block data in a future version.

Block data[edit]

A detector rail's block data stores its orientation and activation status:

Bits Values
0x1
0x2
0x4

A three-bit field storing a value from 0 to 5:

  • 0: flat track going north-south
  • 1: flat track going west-east
  • 2: sloped track ascending to the east
  • 3: sloped track ascending to the west
  • 4: sloped track ascending to the north
  • 5: sloped track ascending to the south
0x8 Set if rail is active.

Block state[edit]

See also: Block states
Name Value Description

 powered
true
false
True if rail is active.

 shape
north_south
east_west
ascending_north
ascending_south
ascending_east
ascending_west
Specifies the rail's orientation.

Video[edit]

History[edit]

Beta
1.5 Added detector rails.
Official release
1.5 13w10a Added texture for active detector rails.
Console Edition
TU1 Added detector rails.

Issues[edit]

Issues relating to "Detector Rail" are maintained on the issue tracker. Report issues there.