... 0 ~ 200.0 ug/L, 0 ~ 20.00 mg/L 2.Resolution: 0.1 ug/L, 0.01mg/L The main ... 0 ~ 200.0 ug/L, 0 ~ 20.00 mg/L 2.Resolution: 0.1 ug/L, 0.01mg/L, 0.1 ... ), load < 750Ω (4-20mA)10.Working voltage: 220 VAC plus or minus 10%,50/60hz11.Feet inches: 96 x 96 ... , breeding, medicine, Tap water, etc. High quality and cheap disslved oxygen controller for Water and wastewater treatment plant measuring/DO probes/DO sensor