Dissolved Oxygen Optical Sensor Designed for Process Applications

The new Rugged Dissolved Oxygen (RDO) PRO sensor from In-Situ (USA) is designed for demanding process applications and features an abrasion-resistant foil that withstands fouling, high sediment loads, and rapid flow rates. The sensor cap is preloaded with calibration coefficients to speed set up and eliminate programming errors. The RDO PRO sensor offers open-architecture communication protocols, including Modbus over RS485, SDI-12 (version 1.3), or 4-20 mA signal outputs. The RDO PRO eliminates the need for costly external transmitters or controllers and operates on a 8 to 36 VDC input or 4-20 mA three wire current loop. Corrosion-resistant construction and durable sensing foil design provide consistent, reproducible results (<0.05 mg/L reproducibility) in demanding environments. The RDO PRO offers reliable, low-maintenance to water quality specialists in municipal or industrial water and wastewater treatment plants, aquaculture settings, dam discharge applications, and food/beverage process control environments.
The In-Situ RDO sensor measure Dissolved Oxygen using the principle of "dynamic luminescene quenching" according to ASTM Method D888-05, Test Method C. Compared to Clark-cell type sensors, the RDO PRO sensor can lower the total cost of acquiring consistent, high-quality data. Th In-Situ RDO sensor significantly reduces instrument checks and recalibration. The RDO PRO sensor is factory-calibrated and requires a quick two-point calibration upon deployment. The calibration can last for several months if sensor fouling is minimal and if the foil is not mechanically damaged or removed. If fouling is high, the sensor can typically be cleaned and redeployed without recalibration. Field-replaceable caps streamline maintenance, reduces costs, and eliminate programming errors.