OCL - CO2 SensorOCL CO2 SENSOR With the Dual Beam CO2 sensor the CO2 value in a given space can be measured and managed very precisely. The sensor can control a CO2 generator or CO2 cold system. The Dual Beam CO2 sensor with light sensor should be plugged into the power supply with led indicator supplied and subsequently into a mains socket using the UTP cable supplied. The UTP cable is plugged into the OCL DLC1. 1 port of the lighting controller marked CO2.