In-Situ RDO PRO-X Optical Dissolved Oxygen Sensor

The In-Situ RDO PRO-X Optical Dissolved Oxygen Sensor uses the latest luminescent technology to measure dissolved oxygen (DO) in demanding environments.


  • Easy sensor configuration - calibration coefficients are loaded into the sensor cap
  • Requires only 8 to 36 VDC power - No external transmitters or controllers needed
  • Includes integral 4-20mA, Modbus RS485, and SDI-12 signal outputs


The In-Situ RDO PRO-X Optical Dissolved Oxygen Sensor is an extremely stable, accurate, low-maintenance optical dissolved oxygen sensor for long-term environmental monitoring. The RDO PRO-X sensor measures dissolved oxygen using the latest dynamic luminescence quenching technology that offers many advantages over Clark-type DO sensors, including stir-independence and insensitivity to interferences such as hydrogen sulfide, chloride, and ammonium. A user-replaceable sensor cap with pre-loaded calibration coefficients is replaced annually, eliminating the need for bi-monthly membrane replacements.

The In-Situ RDO PRO-X Optical Dissolved Oxygen Sensor sensor includes a 10m cable terminating in bare wires for connection to data loggers and PLC's. For custom cable lengths, the sensor is available with a Twist-Lock cable connection. Using the Twist-Lock connection, sensor cables can easily be swapped or extended using a Twist-Lock cable extender, and custom lengths are available up to 4000 feet. The sensor is constructed with inert material and pressure-rated to 500 PSI, making it an ideal solution for highly saline or deep water environments. Common applications include dam discharge monitoring, multi-point dissolved oxygen profiling, and municipal process monitoring.


ImagePart#Product DescriptionQuote
00886900088690RDO PRO-X optical dissolved oxygen sensor, 10m cablequick_quote
00909300090930RDO PRO-X optical dissolved oxygen sensor, Twist-Lock connectorquick_quote