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The smarTROLL Multiparameter Handheld system allows you to instantly collect data on 14 water quality parameters, all from your mobile device. Our reliable water quality sensors record conductivity, pH, ORP, dissolved oxygen, water level/pressure, salinity, total dissolved solids, resistivity, density, air and water temperature, and barometric pressure, sending data wirelessly to your smartphone or tablet.


  • Real-time data
  • Instant data-sharing
  • Replaceable battery pack
  • Site tagging with photos and GPS coordinates
  • Auto-calibration functions
  • Field-replaceable sensor
  • Compatible with low-flow kit (sold separately)


  • Reduce costs – Use your existing mobile device and avoid buying bulky, expensive meters.
  • Save time in the field — The iSitu App simplifies data collection, with calibrations that last for months. No training required, and no waiting for warmup or setup.
  • Easy data-sharing – Probe gives you instant results that can be emailed on the spot.
  • Get built-in support — access free, 24/7 tech support right from the app.

Product Images

Bundle includes:

  • smarTROLL MP Probe
  • Bluetooth-enabled battery pack with 4 1.5 V AA batteries
  • Cable, available in 4 different lengths: 5 ft, 15 ft, 30 ft, 100 ft (1.5 m, 4.6 m, 9.1 m, 30.5 m)
  • Weighted restrictor
  • Calibration cup
  • Storage cup
  • Quick Start Guide and NIST-traceable certificate of analysis

An iOS device (such as an iPod touch) is required for use and must be purchased separately. The iSitu App must be downloaded through the Apple iTunes store.