The Submersible Hydrostatic Level Transmitter is an essential field instrument for continuous liquid level measurement in municipal and industrial water treatment plants, reservoirs, sumps, and open channels. Designed specifically to integrate with SCADA automation systems, these transmitters provide real‑time, accurate level data that enable sophisticated control logic, automatic pump sequencing, and alarm management for process safety and operational efficiency.
Hydrostatic level transmitters operate on the principle that liquid pressure increases with depth: a pressure sensor submerged at the bottom of the tank or channel measures the hydrostatic pressure exerted by the liquid column above it. This measured pressure is converted into an electrical signal proportional to fluid level — typically 4–20 mA analog output with optional digital communication via Modbus RTU/RS‑485 or HART — allowing seamless integration with PLCs, RTUs, or SCADA host software. The simple physics behind hydrostatic measurement ensures high accuracy and reliability, making these transmitters ideal for critical water process control.
Field units are built for harsh operating environments, featuring robust 316 stainless steel housings, high IP68 protection, and corrosion‑resistant components suited for long‑term submersion in water, wastewater, and sludge. Such protection ensures minimal maintenance, reduced downtime, and reliable performance even in wet, humid, or chemically exposed environments typical of treatment plants. Some models also include temperature compensation and onboard diagnostics, which further improve measurement stability and signal integrity in fluctuating conditions. In a typical SCADA automation architecture, hydrostatic level transmitters are strategically installed in raw water reservoir tanks, clarifiers, intermediate process tanks, effluent collection basins, and pump sumps. Continuous level feedback allows the SCADA system to manage processes such as automatic pump starts/stops, overflow prevention, interlocks, and cascading alarms for high/low levels. Operators can view real‑time level trends, set configurable thresholds, and analyze historical data for process optimization and reporting. With accurate level measurement, water treatment plants improve operational efficiency, energy usage, and regulatory compliance, while reducing manual monitoring efforts.
Hydrostatic Level Transmitter Series Catalog – LEEG (English PDF) https://pdf.directindustry.com/pdf/shanghai-leeg-instruments-co-ltd/leeg-hydrostatic-level-sensor-transmitter-series/66713-632215.html