Level TROLL 400

Level TROLL 400

Availability: In stock

Code: RB_LT400
Please log in to enter your reservation dates and estimate costs.


The Level TROLL 400 measures and logs water level, water pressure, and temperature in a maintenance-free system ideal for long-term monitoring at flood-prone or high humidity sites. Durable titanium construction guarantees long-lasting performance in fresh or saline groundwater and surface-water environments. Available in non-vented (absolute) pressure ranges up to 1120 ft (341m). Integrate with telemetry systems and HydroVu Data Services for real-time feedback on all of your water monitoring sites.


  • Sub-1 inch diameter for easy fit
  • Non-vented (absolute) pressure ranges up to 1120 ft (341m)
  • Fully sealed, all titanium construction and sensors
  • Flexible communication protocols (4-20 mA, SDI-12, RS-485)
  • Direct-read or periodic data download capable
  • NIST calibration report
  • Rugged twist-lock cable sold separately


  • Zero maintenance – No desiccant required.
  • Convenient real-time data – Open communication protocols integrate easily with existing telemetry systems and HydroVu Data Services, SCADA, or data logger/sampling system.
  • Protect your data and your equipment – Solid titanium construction outlasts specially coated data loggers, even in harsh environments.
  • Reliable data – Advanced accuracy and precision provide high quality results you can trust.
  • Streamline data collection and analysis – Powerful software with special logging modes automates water level corrections, post-processing, report generation and data export.
  • Reduce field time – Low-power loggers last 10+ years.
  • Quick and easy data-sharing – View and share data on the spot using your mobile device. Intuitive VuSitu Mobile App is an all-in-one software package that provides auto-configuration, simplified calibration, directed data analysis, and automated report creation.

Temperature rangesOperational: -20 to 80℃ (-4 to176℉ ) Storage:  -40 to 80 ℃ (-40 to 176 ℉ ) Calibrated:   -5 50℃ (23 to122℉)

Diameter | 1.83 cm (0.72 in.)

Length | 21.6cm(8.5in.)

Weight | 197g

Materials | Titanium body; Delrin ®nose cone

Battery type | 3.6v Lithium; 10 years or 2M readings

Memory | 2.0MB | Data records | 120,000 | Data logs | 50

Fastest logging rate | 2 per second

Log types | Linear, Fast Linear, and Event

Burst pressure | max. 2x range; burst > 3x range

Accuracy - Full Scale | ±0.05% |

Resolution | ±0.005% FS or better

Units of measure | Pressure: psi, kPa, bar, mbar, mmHg, inHg, cmH20, inH20 Level: in., ft, mm, cm, m

Temperature Sensor

Accuracy | ±0.01℃

Resolution | 0.01℃ or better

Units of measure | Celsius or Fahrenheit

Level TROLL 400 spec sheet


  1. Selected instrument
  2. Cable (length varies based on chosen configuration) - Every cable includes patented twist-lock connectors and Kellems grip.
  3. Small desiccant
  4. Your selection of device communication option(s).