Key Specifications

Range of deployment options: 0.72-in (1.83-cm) diameter titanium housing is suitable for harsh environments. The TROLL® Shield Antifouling System extends instrument deployments at high-fouling sites.

Durable design: Titanium

Extended battery life: 5 years or 200,000 readings (1 reading = time and date plus all available parameters polled or logged from the device)

Supported parameters: Actual conductivity, specific conductivity, salinity, total dissolved solids, resistivity, density

Accurate readings
Conductivity sensor: < 80,000 µS/cm ±0.5% of reading + 1 µS/cm; > 80,000 µS/cm ±1.0% of reading
Temperature sensor: ±0.1° C
Pressure sensor: ±0.05% full scale at 15° C

SCADA and telemetry ready: Uses open communication protocols, including Modbus/RS485, SDI-12, and 4-20 mA

Versatile power options: Uses external battery pack or line power



Aqua TROLL 200 Data Logger

The Aqua TROLL® 200 CTD Logger measures and records conductivity, temperature, and water level/pressure.

Conductivity measurements can be used to characterize water quality changes relative to a baseline or to estimate the concentration of contaminants. Plus, you get the highest levels of accuracy when monitoring water level in saline environments.

Rugged Design

  • Titanium housing safeguards against corrosion.
  • Sealed unit withstands pressures up to 500 psi. 

Extended Deployments

  • Typical battery life is 5 years or 200,000 readings. External batteries, solar power, or external 8-36 VDC options are also available.
  • TROLL® Shield Antifouling System reduces biofouling and increases deployment times. 

Accurate Results

  • Dynamic density compensation delivers superior water level accuracy in environments where salinity values vary due to mixing, rainfall, or tides.
  • Instruments are factory-calibrated and validated with NIST®-traceable standards.
















Aqua TROLL 200 Datalogger

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