In-Situ Aqua TROLL 400 Multiparameter Probe

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The Aqua TROLL 400 Multiparameter Probe is an all-in-one multiparameter probe that measures 12 water parameters. The probe contains six water quality sensors housed in a sub-2 inch unit, measuring actual and specific conductivity, salinity, total dissolved solids, resistivity, density, dissolved oxygen, ORP, pH, temperature, water level and water pressure.


  • 12 parameters from six sensors.
  • DO readings automatically compensate for salinity.
  • Modbus/RS485 or SDI-12 protocols.
  • Compact instrument.
  • Durable materials.
  • Versatile power options (no internal battery).
  • Real-time readings (data storage unavailable).


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