Connect up to 16 Titan Controls NEW environmental Sensors (Sold Separately) to monitor and track crucial environmental data such as VWC and EC with the Triton Substrate Sensor or VPD, with the Tali VPD Sensor. To connect to Titan Environmental Sensors, each EL3 comes with a Titan Sensor Adaptor Cable, packaged separately. \n \n8-inch touchscreen interface \nControls up to 512 fixtures \nEasily updatable via USB \nSpray feature dims lights to help protect against crop burn during spray applications \nData logging saves setting history for trend and performance data \nThe Gavita Master Controller EL1 and EL2 are entry-level systems for centrally controlling large rooms with e-series fixtures. These controllers feature improved and expanded functionality that raises the bar. \n \nHigh-temperature dimming and safety feature shut-off \nEvent logging \nIndependent sunrise and sunset settings \nIndependent light cycles and Programmable External Contactor Modules (ECMs) on the EL2 \nNote: If using the EL1/2 controller with one of Gavita's LED fixtures (1700e/900e/CT1930e), the purchase of HGC906717 or HGC906716 is required.