Submersible Pressure Transducers for Liquid Pressure and Level Measurement

Submersible Pressure Transducers for Liquid Pressure and Level Measurement

Submersible Pressure Transducers are a special type of pressure transmitter. Equipped with a sturdy, durable and airtight stainless steel casing with a protection level of up to IP68. The probe measures static pressure. This allows conclusions to be drawn about the current liquid level, i.e. the height of the liquid column above. Commonly used for underwater pressure and level measurement in water tanks, wells, shafts and boreholes.

Sino-Inst manufactures and supplies various types of Submersible Pressure Transducers. Supports customization of material, installation method, measuring range, output signal and other parameters to meet your specific needs.

Featured Submersible Pressure Transducers

Principle of liquid level measurement by Submersible pressure transducer

The pressure level transmitter is made of advanced isolated diffused silicon sensitive components. Simply put it into a container or body of water to accurately measure the height from the end of the water level gauge to the water surface. And the water level value is output through 4-20mA current or RS485 signal.

Using static pressure measurement principle:
When the liquid level transmitter is put into a certain depth of the liquid to be measured, the pressure formula on the liquid surface of the sensor is: Ρ = ρ .g.H + Po

In the formula:
P: Pressure on the liquid surface of the transmitter
ρ: Density of measured liquid
g: local gravity acceleration
Po: Atmospheric pressure on the liquid surface
H: Depth of the transmitter into the liquid

At the same time, the pressure of the liquid is introduced into the positive pressure chamber of the sensor through the gas-guiding stainless steel. Then connect the atmospheric pressure Po on the liquid surface to the negative pressure chamber of the sensor. to offset Po on the back of the sensor. Let the pressure measured by the sensor be: ρ.g.H. Obviously, by measuring the pressure P, the liquid level depth can be obtained.

Submersible pressure transducer measures water level

Submersible pressure transducer measures water level

Submersible pressure transducers are commonly used in the water and wastewater industries. This is the simplest, most effective, and low-cost way to measure water level. With IP68 protection grade and stainless steel material, the submersible pressure transmitter is used in the widest range of different media.


  • Wastewater treatment and biogas production;
  • Alkaline water and fuel tank level measurement for shipbuilding;
  • oil and fuel storage tanks;
  • Mining and Gas Extraction;
  • Water level measurement in rivers and lakes;
  • deep well and groundwater monitoring;
  • Level measurement in containers and storage systems;
  • Sewage lift pump and pumping station control;
  • sewage, sediment and flood drainage system monitoring;

Submersible pressure transmitter for corrosive liquids

Submersible pressure transmitter for corrosive liquids

Submersible anti-corrosion pressure transmitter is a fully sealed submersible structure. An anti-corrosion ceramic capacitive pressure sensor is used.

The probe put into the measured medium is made of corrosion-resistant materials such as PVC, PP or PVDF. The gas cable uses special anti-corrosion liquid level wire made of PTFE. Mainly used in liquid level measurement of corrosive media such as acids and alkalis.

This product has multiple designs for reliable sealing in the connections of the shell, wires and other links. The interior adopts a full potting process. This ensures that the product has a long service life. It is widely used in chemical industry, environmental protection, medicine, industrial process control and many other occasions.

Temperature and pressure integrated Submersible sensor

The Submersible pressure + temperature integrated transmitter is composed of an isolated liquid level sensor, a temperature sensor and a dedicated circuit for the instrument. It converts the liquid level (pressure) and temperature of the measured medium into 4~20A standard electrical signals respectively.

The product adopts an integrated design and can detect the liquid level and temperature at a certain point at the same time. It is suitable for places where liquid level and medium temperature are measured at the same time.


Temperature and pressure integrated Submersible sensor
  • Liquid level (pressure) + temperature multi-function measurement
  • Dual 4~20mA signal output
  • High precision, all stainless steel structure
  • Strong anti-interference and good long-term stability
  • Gas cable transmission
  • Anti-condensation and anti-lightning strike design
  • Intrinsically safe explosion-proof

More Featured Pressure and Level Measurement Solutions

Submersible Pressure Transducers, also called waterproof pressure transmitters, are specially designed for pressure monitoring of outdoor open pipelines and submersible pipelines. It can work stably underwater, regardless of harsh environmental conditions or rapidly changing pressure values. With IP68 protection rating, it can demonstrate excellent long-term stability and accurate reliability.

Submersible Pressure Transducers can measure underwater pressure, water level, or the level of other liquids. In conjunction with controllers, solenoid valves, etc., it can be used as a liquid level control system for tanks.

Sino-Inst produces and supplies various types of Submersible Pressure Transducers and supports customization. If you need to measure underwater pressure or liquid level, please contact our engineers!

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