OTT PLS  – Pressure Level Sensor

The OTT PLS measures water level, depth to water, or pressure by means of an integrated controller and ceramic pressure-measuring cell. Design features such as multiple communication outputs (SDI-12 or 4 … 20 mA), stainless steel housing, and a rugged cable make this sensor ideal for monitoring water level in a variety of applications.

  • Application: Surface water, Groundwater
  • Measurement technology: Vented pressure cell
  • Parameters measured: Water level, Pressure, Temperature
  • Product Highlights: Water level and temperature measurement – for use with external data logger
  • Measurement range: 0 … 4, 10, 20, 40, and 100 m
  • Accuracy: ± 0.05% FS
  • Internal data logger: Yes
  • Interface: SDI-12, RS-485 (using SDI-12), or 4 … 20 mA
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  • The robust ceramic pressure cell offers industry-leading accuracy and does not deform over time like membrane technology, providing long-term measurement stability
  • Rugged design: Ceramic pressure cell resistant to physical force (5 x burst pressure) and enclosure made of high-quality saltwater resistant steel for use in coastal environments
  • Built-in micro controller – compensates for temperature effects and applies correction values for gravitational acceleration and water density
  • Vented pressure probe, automatically compensates for changes in barometric pressure
  • Robust cable with Kevlar core for length stabilization and capillary tube for venting
  • Simple setup and connection to external data loggers using SDI-12 or 4 … 20 mA interfaces
  • Optimized resolution is achieved by assigning the 4 … 20 mA to that part of the measuring range that is actually required
  • Water temperature output in addition to water level (for SDI-12 output
  • Measuring water level in surface and groundwater, including:
  • Stations with sloping bottom, e.g. water banks
  • Small diameter pipes or holes (from 1″ Ø)
  • Dams, weirs, irrigation systems
  • Waterways that occasionally ice over
  • Brackish water, saltwater
  • Waterways that do not contain water throughout the year (e.g. retaining basins)