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.
Surface water, Groundwater
Vented pressure cell
Water level, Pressure, Temperature
Water level and temperature measurement – for use with external data logger
0 … 4, 10, 20, 40, and 100 m
± 0.05% FS
No
SDI-12, RS-485 (using SDI-12), or 4 … 20 mA
Advantages
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 microcontroller – 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 dataloggers 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)
Examples of Use
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)
Resources
White Paper – OTT ecoLog Guidance: Remote communication via mobile networks
