ItemSprites.png Heart Monitor

Place this device and anybody can watch it to see if you are online! Or alive. Note: it can't actually tell if you're alive. But it will beep if you are online!
This item can be placed in two directions, depending on the direction you're facing.
This item never drops any seeds.
This item can't be destroyed - smashing it will return it to your backpack if you have room!
TypeItemSprites.png Heart Monitor - Foreground
ChiItemSprites.png Water
Texture TypeTextureTypeSprite.png Single
Collision TypeCollisionTypeSprite.png No Collision
HardnessItemSprites.png 8 Hits
ItemSprites.png 6 Hits
Restores after 3s of inactivity.
Seed ColorSeedSprites.png
Grow TimeTreeSprites.png 1h 0m 0s
Default Gems DropItemSprites.png N/A

The Heart Monitor is an unsplicable non-solid block which was added along with the Surgical Kit. This item can only be obtained from purchasing the Surgical Kit.

When placed, the online/offline status of the player who placed it down will be displayed on it.


  • Heart Monitor's function to detect whether the player is online or not is a reference to actual heart monitors, which are generally used to detect whether a hospital patient is still alive or not.
  • Only up to 32 of these can be placed in a world. A message about "wiring concerns" appears when a player tries placing the 33rd.
  • It takes a while for Heart Monitors to update.


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