A Hydrostatic Level Transmitter is an instrument used to measure the level of liquids in tanks, reservoirs, wells, and open channels by sensing the hydrostatic pressure exerted by the liquid column above the sensor.
The transmitter operates on the principle that the pressure at a given depth in a liquid is directly proportional to the height of the liquid above it.
P = \rho g h
Where:
The pressure sensor measures this hydrostatic pressure and converts it into an electrical output signal proportional to the liquid level.
A typical hydrostatic level transmitter consists of:
A hydrostatic level transmitter measures liquid level by detecting the pressure created by the liquid column above the sensor. It is widely used for continuous level measurement in water, wastewater, chemical, and industrial storage applications because of its simplicity, reliability, and cost-effectiveness.
A Hydrostatic Level Transmitter is an industrial measurement device used to determine the level of liquid in a tank or reservoir by measuring the pressure exerted by the liquid column.
It is widely used in water treatment plants, chemical industries, and storage tanks because it provides continuous, accurate, and reliable level measurement.
The transmitter works on hydrostatic pressure theory, where pressure increases with liquid height:
P = \rho g h
The sensor measures pressure and converts it into an electrical signal proportional to level.
A hydrostatic level transmitter typically includes:
A hydrostatic level transmitter is a pressure-based instrument that converts liquid head pressure into level measurement. It is widely used due to its simplicity, durability, and suitability for continuous industrial monitoring.
| Specification | Typical Value |
|---|---|
| Measuring Principle | Hydrostatic pressure sensing |
| Sensor Type | Piezoresistive / Capacitive |
| Measuring Range | 0–1 m to 0–100 m (or up to 0–10 bar) |
| Accuracy | ±0.1% to ±0.5% FS |
| Repeatability | ±0.1% FS |
| Output Signal | 4–20 mA (2-wire), HART optional |
| Power Supply | 12–30 VDC (typically 24 VDC) |
| Operating Temperature (Electronics) | -10°C to +70°C |
| Process Temperature | -20°C to +80°C (higher on special versions) |
| Pressure Overload | 2× to 4× full scale |
| Protection Class | IP68 (submersible type), IP65/IP67 (non-submersible) |
| Housing Material | SS316L stainless steel |
| Diaphragm Material | SS316L / Hastelloy / Ceramic |
| Cable Type | PUR / PE cable with vent tube (gauge type) |
| Signal Damping | Adjustable (0–30 sec typical) |
| Long-term Stability | ±0.2% FS per year |
| Installation Type | Submersible / flange / threaded mounting |
| Media Compatibility | Water, wastewater, chemicals (based on material selection) |
| Calibration | Factory calibrated, field adjustable |
