... L, 0.01mg/L, 0.1°C3.Fine degree: ug/L: plus or minus 1.0% FS ... groups of ON/OFF relay contact, divided into high and low alarm signal photoelectric isolation output.6 ... : environmental temperature is 0 ~ 60°C, relative humidity 90% or less9.The output load: load < 500Ω ... biological fermentation, breeding, medicine, Tap water, etc. High quality and cheap disslved oxygen controller for Water and wastewater ...