... temperature, output current, alarm point shows , intuitive and easy to read, and a range transfinite tip.3. Screen display alarm state ... Output: 4-20mA7. Can restore factory settings.Main technical parameters1.Measuring range: 0 ~ 200.0 ug/L, 0 ~ 20.00 ... , medicine, Tap water, etc. High quality and cheap disslved oxygen controller for Water and wastewater treatment plant measuring/DO probes/DO sensor