The Octopus water level sensor is the water level electrical component in the Octopus series. The basic design is from the Octopus electrical bricks, and the outlook setting, PCB mounting hole and connectors are identical.
The 2-channel tracking module integrated two groups of reflective infrared pair diodes that can be used to identify black lines.
This module is usually used to create line tracking smart cars. You can design black tracks at will and make cars follow them through programming