Part Number: RDOPRO

The RDO PRO-X Probe continuously monitors dissolved oxygen and temperature in ponds, tanks, and raceways. With accuracy up to ±0.1 mg/L, it’s the most accurate DO probe available for aquaculture management, with flexible communications that link easily to telemetry and SCADA/PLS systems for 24/7 monitoring.

This durable probe requires no calibration, conditioning, or membranes. The sensor cap has a 24-month operating life, storing calibration coefficients, and serial number. To replace cap, simply snap off the old one and pop on a new one.


  • Most accurate DO probe on the market
  • Flexible communication protocols (4-20 mA, Modbus/RS485, SDI-12)
  • Available in standard 10m cable or twist-lock in custom lengths
  • Doesn’t corrode in saline environments
  • Hydrogen sulfide, chloride, ammonium, and oils don’t cause interference
  • Automated sensor cap diagnostic alerts
  • Requires only 8 to 36 VDC


  • Prevent fish kills – Easily connects to most controllers, SCADA, or PLCs for 24/7 monitoring and alarms.
  • Increase yields – High-accuracy probe lets you optimize DO for maximum growth.
  • Accurate, reliable data – Resists abrasion and photobleaching, with automated calibration that prevents long-term drift.
  • Easy maintenance – Cap lasts 24 months, automatically alerting you when it’s time to replace.

Product Images


  • RDO PRO-X probe (option of 10 m stripped-and-tinned cable or twist-lock connector)
  • RDO-X sensor cap
  • Calibration cup
  • Manual