The smarTROLL Multiparameter Handheld system allows you to instantly collect data on 14 water quality parameters, all from your Android™ or iOS™ 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
  • The intuitive VuSitu Mobile App for Android and iOS
  • Rechargeable Power Pack for Android & iOS
  • 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 iOS or Android mobile device and avoid buying bulky, expensive meters.
  • Save time in the field — The intuitive mobile app (iSitu App for iOS or VuSitu App for Android) 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

Obsolescence Notification:

In-Situ will cease production of the smarTROLL Multiparameter Handheld, Sept. 1, 2019. Any products purchased before that date will be supported throughout their warranty life.

We urge you to consider the Aqua TROLL 400 or Aqua TROLL 500 as ideal alternatives to the smarTROLL MP. These versatile and cost-effective instruments enable wireless data collection on multiple parameters with the powerful VuSitu mobile app.