Chest Reader

The Chest Reader is a block added by Expanded Redstone. It will output a redstone signal depending on whether the chest in front of it is empty or full. The front is indicated by a green triangle on the top texture.

It has two modes that can be cycled between one another by right clicking the block. When the top texture has a cross, it outputs a signal when the inventory is empty, otherwise it will output a signal when the inventory is completely full.

Unlike the name suggests, it works for all inventory blocks.