The disclosure provides a direction sensor, including a transmission device and a reception device, wherein the transmission device contains an encoding chip for encoding the equipment ID of local equipment into a binary signal, a transmission circuit for adjusting the binary signal to a pulse electric signal and an electromagnetic wave generator for sending the pulse electric signal in the form of electromagnetic wave; and the reception device contains a photoelectric converter for receiving the electromagnetic wave and converting the electromagnetic wave to a pulse electric signal, a reception circuit for converting the pulse electric signal to a binary signal and sending the binary signal to a decoding chip and the decoding chip for reading equipment IDs of other equipment from the binary signal, obtaining the equipment ID of the local equipment, and sending the read equipment ID and a sensor code of the sensor itself when determining that a read equipment ID is different from the equipment ID of the local equipment. The disclosure also provides a device, equipment and method for data transmission by touch. Application of the device, equipment and method provided by the disclosure enables a simple and explicit data transmission procedure and provides convenience for user operation.