LTL Controls Element 1 - Environmental ControllerThe Element 1 by LTL Controls is an accurate and budget conscious solution for maintaining temperature and humidity within the growing area, and can also operate a CO2 device and a nighttime device. The Element 1 features a highly accurate solid state temperature and humidity sensor which is designed to resist EMI EFI from electronic digital ballasts, a superiorly engineered circuit board, heavy duty internal construction, and high quality UL CE