■ EDN.366 Submersible Level Pressure Transmitter

- Stainless steel housing & sensor

- Designed for water & oil level measurement

- Accuracy ±0.5%, ±0.25%, ±0.1% F.S

- Atmospheric pressure compensation cable included

■ Product Overview

The EDN.366 series is a submersible pressure transmitter designed for hydrostatic level measurement in liquids such as water and oil.

The measurement principle is based on hydrostatic pressure, where the pressure applied to the sensor corresponds to the liquid level, assuming a specific gravity of 1 for pure water. For liquids with different densities, such as oil, appropriate compensation factors must be applied.

Since hydrostatic level measurement can be affected by atmospheric pressure variations, the EDN.366 is designed with an integrated atmospheric pressure compensation system to ensure accurate measurement.

All housing and sensor components are made of stainless steel, making the transmitter suitable for use in non-corrosive liquids such as water and oil.

The EDN.366 is primarily used for level measurement in open tanks exposed to atmospheric pressure. For closed tanks, where internal air density may vary, the use of differential pressure transmitters is recommended.

In addition, the cable includes a vent tube for atmospheric pressure compensation. Therefore, the cable length cannot be extended after production, and the required total cable length must be specified at the time of order.

■ Pressure Measurement Principle

The EDN.366 measures liquid level based on hydrostatic pressure.

The pressure applied to the sensor is proportional to the height of the liquid column and is calculated according to the following principle:

P = ρ g h+ Po

            Ρ : Density of the liquid

            g : Gravitational acceleration

            h: Height (level) of the liquid

            Po : Pressure applied at the liquid surface (atmospheric pressure)

            (For example, a liquid depth of 100 cm corresponds approximately to 100 mbar (for water))

The sensor detects this pressure and converts it into an electrical signal, which is then amplified and output as a stable analog signal.

■ Materials of Wetted Parts

All wetted parts, including the housing and sensor, are made of stainless steel.

This ensures reliable operation in water and oil applications where no significant chemical corrosion is present.

■ Accuracy Class

The EDN.366 series offers the following accuracy options:

▶ Standard: ±0.5% F.S

▶ Option: ±0.25% F.S

▶ Option: ±0.1% F.S

■ Applications

The EDN.366 is suitable for level measurement in the following applications:

▶ Water tanks

▶ Oil tanks

▶ Open reservoirs

▶ General liquid level monitoring

■ General Specifications