- Measured Parameters: Absolute water pressure, calculated water level, and temperature.
- Durable Construction: 0.72-inch (1.83 cm) solid titanium body; corrosion-resistant in fresh, salt, and contaminated water.
- Low Maintenance: Non-vented (absolute) design; no desiccants required, ideal for long-term deployments in high-humidity or flood-prone sites.
- High Accuracy & Anti-Drift: Piezoresistive titanium pressure sensors with 3D factory calibration and anti-drift system for long-term stability.
- Long Battery Life: 3.6V lithium battery, typically 10 years of operation or 2 million readings.
- Flexible Communication: Supports 4-20 mA, SDI-12, RS-485/Modbus for integration with telemetry, SCADA, or data loggers.
- Data Management & Telemetry: Compatible with VuSitu Mobile App for on-site viewing/export; integrates with VuLink telemetry and HydroVu Data Services for real-time monitoring and alerts.
- Memory Capacity: 2 MB, storing up to 130,000 records (date/time plus two parameters).
- Logging Modes: Linear, Fast Linear, and Event logging for flexible data collection.
Level TROLL 400 Data Logger
Unless you require vented level data, the Level TROLL 400 is for you. This low-maintenance data logger measures and logs water level, water pressure, and temperature. Ideal for long-term monitoring at flood-prone or high-humidity sites, the Level TROLL 400 is available in non-vented (absolute) pressure ranges. 3D factory calibration and our unique anti-drift system ensure accuracy, and durable titanium construction is designed to withstand harsh conditions in fresh or saltwater, in either groundwater or surface water environments.
As part of In-Situ’s shared ecosystem, this versatile instrument easily integrates with accessories and in-well telemetry. Pair with In-Situ’s VuLink telemetry and HydroVu Data Services for powerful remote data access and management. Smart addressing enables you to connect any device to the same data logger without reprogramming to monitor the same parameter.
- Groundwater Monitoring: Aquifer characterization, water table fluctuation tracking, and remediation support.
- Surface Water Monitoring: Monitoring rivers, lakes, and streams for water levels, quality trends, and flood management.
- Coastal & Estuarine Studies: Tracking tides, wetlands, and estuaries for baseline data and event response.
- Mining Applications: Monitoring dewatering operations, pit lake water levels, and mine drainage.
- Hydrologic Events: Assessing storm surges, flood control systems, and crest stage gauging.
- Pressure Sensor: Piezoresistive, non-vented (absolute), range up to 341 m (1120 ft), ±0.05 % FS accuracy.
- Temperature Sensor: Silicon, ±0.1 °C accuracy, operational range -20 °C to 80 °C.
- Physical Specifications: Titanium body, 1.83 cm (0.72 in) diameter, 21.6 cm (8.5 in) length, 197 g weight, Delrin® nose cone.
- Data Logging: 2 MB memory (~130,000 readings), Linear/Fast Linear/Event logging modes, up to 4 logs/sec.
- Power & Communication: 3.6 V lithium battery (10+ years), 8–36 VDC external power, outputs include Modbus/RS485, SDI-12, 4–20 mA, integrates with HydroVu Data Services.
- Calibration: 3D factory calibration, NIST traceable.
