Isodaq Technology is now part of Hydro International.

RDO Pro-X Optical Dissolved Oxygen Sensor


  • Fast response to DO and and temperature changes
  • Robust optical sensor requires minimal maintenance
  • Extremely stable sensor holds calibration for up to 12 months
  • Choice of ouputs - 4-20mA, Modbus, RS485 or SDI-12
  • Rugged cable system with TwistLock connectors
  • Factory calibrated to US NIST traceable standards

RDO Pro-X Optical Dissolved Oxygen Sensor

Full Description

Robust and reliable

  • No calibration, conditioning, or membranes required.
  • Stands up to harsh conditions - Inert construction will not corrode in saline samples.
  • Insensitive to common interferences such as hydrogen sulfide, chloride, ammonium, and oils.
  • Sensor health diagnostics ensure peak performance.

Cost effective

  • Includes complete instrument with standard 10-m cable.
  • Includes integral 4-20 mA, Modbus RS485, and SDI-12 signal outputs
  • Eliminates the need for costly external transmitters and controllers.

Stable, reproducible results

  • ±0.1 mg/L accuracy from 0 to 8 mg/L DO
  • ±0.2 mg/L accuracy from 8 to 20 mg/L DO
  • ±10% of reading from 20 to 50 mg/L DO
  • Fast response to DO and temperature changes
  • Consistent, reproducible results (< 0.05 mg/L reproducibility)