The Level TROLL 500 is In-Situ's most popular water level data logger — a cost-effective, sub-1-inch instrument suited to a wide range of groundwater and surface water projects. It continuously logs water level, water pressure, and temperature, with vented (gauged) pressure ranges up to 500 psig for automatic atmospheric compensation, so there's no need to correct for barometric pressure changes after the fact.

Solid titanium construction stands up to fresh, saline, and even contaminated water, and sensors are calibrated across the full pressure and temperature range for accurate, reliable data. Smart Addressing keeps every parameter mapped to the same Modbus address across In-Situ equipment, so you can swap devices without reprogramming. Integrates with VuLink telemetry and HydroVu Data Services for remote data access and automatic event alerts, and typically runs 10+ years on its internal battery.

Note: Twist-Lock Backshell/Hanger sold separately.