|Type of Block||Redstone Blocks|
|Data Values||Hex: ???|
Redstone Comparators are a special redstone block that is similar to redstone repeaters. Redstone comparators have a third torch on them, allowing for complex redstone features. Redstone comparators have three ports, with two being for input, the third for output. Redstone comparators also measure how many things a entity holds or weighs allowing for very interesting adventure maps. They also detect how many items are stored in a container block (such as a chest,hopper, dropper or dispenser).
Here is a tutorial on how to build with a redstone comparator.