This set of OPTO sensors (transmitter + receiver) is universal and suitable for use in practical control. This receiver is equipped with LED indication so that the status of the OPTO sensors is easy to read. The transmitter is equipped with a 6,500mm cable with a 3-pin MOLEX plug and the receiver is equipped with a 500mm cable with a 3-pin MOLEX plug. This set is supplied with a set of reducing sleeves (22 > 11mm) so that this set can be used in various types of bottom rubber.