******** The Model smarTROLL Handheld with RDO Probe HAS BEEN REPLACED ********
SensorPros recommends the "
In-Situ - RDO Blue Dissolved Oxygen Probe " product line as the replacement sensor.

smarTROLL Handheld with RDO Probe - OVERVIEW
Manufactured by:  In-Situ


  • Real-time data
  • Auto-calibration functions
  • Site tagging with photos and GPS coordinates
  • Replaceable Battery Pack (iOS) or rechargeable Power Pack (Android)
  • Field-replaceable sensor cap
  • Instant data-sharing
  • NIST calibration report for guaranteed accuracy


  • Reduce costs — Use your existing iOS or Android mobile device and never have to purchase bulky, expensive meters again.
  • Smart, easy monitoring — Sensor is pre-calibrated at the factory, and the mobile app eliminates training and setup (iSitu App for iOS or VuSitu App for Android).
  • 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.