The ChlorKing Sentry Aqua Guard UV adds an additional layer of protection to the pool and spa.  With systems available in both Supplemental and Secondary designs, our UV employs high output amalgam technology for better chloramine control and inactivation of chlorine resistant pathogens. Sentry’s Secondary line has been third party validated by NSF to confirm a minimum inactivation equivalent of 3 log (99.9%) cryptosporidium parvum in accordance with NSF 50 and the US EPA UV DGM. Adding Sentry Low Pressure, High Output UV will decrease chemical usage and increase air quality satisfaction.