The SM 6000 is a unit manufactured by Telco Sensors company. It is a thru beam that is 1-6 m in measurement. Further, it has a high tolerance to hostile environments. Further, the unit has low current consumption. It has a 10-32 V dc supply voltage and a 5 or 0,5 ms response time.
The unit's transmitter and receiver are protected against reverse polarity of power supplies, control input and output signals. The output is also protected against short circuit and inductive loads.