Online Optical Do Transmitter RS485 Water Dissolved Oxygen Sensor with 316L Fluorescent Cap

Unlike polarographic DO sensors, the fluorescence principle measures oxygen without consuming it, eliminating electrolyte maintenance and membrane fouling issues common in electrochemical alternatives

By comparing the phase difference with the internal calibration value, it has a faster response speed, stronger anti-interference ability, and higher accuracy than the polarographic method.

Available in separate freshwater and seawater versions, with salinity compensation built in, since higher salinity directly reduces dissolved oxygen concentration at the same saturation percentage.

Fully submersible to IP68 with 0.6MPa pressure tolerance, supporting deployment at significant water depths in rivers, aquaculture tanks, reservoirs, and coastal seawater monitoring stations.

Measures from 0 to 20mg/L with 0.01mg/L resolution and 0.1% saturation resolution, capturing fine dissolved oxygen fluctuations critical for aquaculture and wastewater treatment control.

Integrated temperature measurement at plus or minus 0.5 degrees C accuracy enables real-time automatic temperature compensation, since DO saturation concentration changes significantly with water temp

Draws only 0.2W across a wide DC 10 to 30V supply range, enabling solar or battery-powered deployment in remote fish ponds, wetlands, and off-grid water quality monitoring stations.

Uses imported premium fluorescent membrane rated for 1 year of normal use. Only the membrane cap requires periodic replacement, keeping long-term consumable costs extremely low.

Electrode features NPT 3/4 threading compatible with Renke waterproof pipes, allowing the cable to be routed through the pipe for a clean, protected installation in harsh aquatic environments.

Supports zero oxygen and 100% saturation two-point calibration through free PC configuration software, with step-by-step in-software guidance.