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The smarTROLL Rugged Dissolved Oxygen Handheld system merges smartphone mobility with an innovative optical RDO sensor.

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Ideal for water quality testing spot checks, the probe measures and records dissolved oxygen, barometric pressure, air and water temperature, sending data wirelessly to your smartphone or tablet.


  • Real-time data
  • Auto-calibration functions
  • Site tagging with photos and GPS coordinates
  • Replaceable battery pack
  • Field-replaceable sensor cap
  • Instant data-sharing
  • NIST calibration report for guaranteed accuracy


  • Reduce costs — Use your existing mobile device and never have to purchase bulky, expensive meters again.
  • Start monitoring ASAP — Sensor is pre-calibrated at the factory, and iSitu app (sold separately) eliminates training and setup.
  • Faster spot checks — Device automatically recognizes calibration solutions and corrects for barometric pressure.
  • Streamline data sharing — Get instant results and email them on the spot.