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Level TROLL 500 Data Logger


The Level TROLL 500 is In-Situ’s most popular water level data logger. A cost-effective option suited to a wide variety of projects, the Level TROLL 500 logs continuous measurements of water level, water pressure, and temperature. Titanium construction offers durability and long-lasting performance in fresh or saline groundwater environments. Available in vented (gauged) pressure ranges up to 1153 ft (351 m). Integrate with telemetry systems and HydroVu Data Services for real-time feedback on all of your water monitoring sites.


  • Sub-1 inch diameter

  • Vented (gauged) pressure measurement for automatic atmospheric compensation

  • Fully sealed, all titanium construction and sensors

  • NIST calibration report

  • Flexible native communication protocols (4-20 mA, SDI-12, RS-485)

  • Customizable Rugged Twist-lock Kevlar woven cable (sold separately) suitable for use in high solvents


  • Use data immediately – Vented configuration doesn’t require corrections for barometric pressure changes.

  • Protect your data and your equipment – Solid titanium construction outlasts specially coated data loggers, even in harsh environments.

  • Simplify project setup and control – Open communications protocols easily integrate with existing telemetry systems and HydroVu Data Services, plus get 24/7 data and automatic event alerts.

  • Streamline data collection and analysis – User-friendly software minimizes setup time, with special logging modes for groundwater applications and automated graphing, reports and data export.

  • Reduce field time – Low-power loggers last 10+ years.

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