Hydrostatic Level Transmitter

hydrostatic level transmitter is an instrument used to measure liquid level in tanks, wells, or reservoirs by sensing the pressure created by the liquid column 

Hydrostatic Level Transmitter

It works based on the principle of Hydrostatic Pressure.The deeper the sensor is in the liquid, the higher the pressure.

This pressure is converted into a **level reading (meters, liters, or %) **.

⚙️ How it Works (Simple)

Sensor is placed at the bottom of the tank or submerged in liquid

Liquid exerts pressure:

P = ρ × g × h

The transmitter measures pressure and converts it into level output (4–20 mA signal)

Types of Hydrostatic Level Transmitter

1. Submersible Type

Placed directly inside liquid

Used in borewells, tanks, rivers

2. External (Bottom Mounted)

Installed outside tank at bottom

Used in closed tanks

3. Differential Pressure Type

Measures difference between top & bottom pressure

Used in pressurized tanks

⚡ Output Signals

4–20 mA (most common)

0–10 V

Digital (HART / Modbus in advanced models)

🏭 Applications

Water tanks & reservoirs

Borewells & groundwater monitoring

Sewage & wastewater plants

Chemical storage tanks

Oil & fuel tanks