... 240-260nm, which is the most effective sterilizer band, band's strongest point it the ... .7nm.Maintenance:1. the best working condition-water temperature: 5-50 centidegree-ralative temperature: no ... FRP tank, Stainless steel tank, water softener, household water purifier, industrial water filter, RO and UF membrane housing ... of corporation management authentication. Ultraviolet Water Sterilizer 0.5-1GPM