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.