Working principle, product types, application scenarios, and selection guide of Submersible Hydraulic Transmitter

NiuBoL Submersible Hydraulic Transmitter Comprehensive Analysis

Submersible hydraulic transmitter is a high-precision measurement device based on the principle that liquid static pressure is proportional to liquid level height. It converts liquid static pressure signals into standard current or digital signals to achieve real-time monitoring of liquid level and hydraulic pressure. NiuBoL submersible hydraulic transmitter adopts diffused silicon pressure sensor or ceramic capacitive sensor, combined with isolation diaphragm and intelligent amplification circuit, enabling stable and precise operation in complex industrial environments.

Submersible hydraulic transmitters are widely used in power engineering, urban water supply and drainage, pharmaceutical and chemical industries, industrial automation, and hydrogeological exploration, making them an ideal choice for liquid level and hydraulic measurement.

Product Types and Features of NiuBoL Submersible Hydraulic Transmitter

NiuBoL submersible hydraulic transmitters are divided into three categories based on structure and function:

1. General-purpose Submersible Hydraulic Transmitter
       Core sensor: Diffused silicon pressure sensitive element
       Installation method: Cable directly submersed into the site, easy installation
       Signal processing: Built-in integrated amplification chip, supports wide voltage power supply
       Protection measures: Anti-clogging, anti-scaling, lightning protection, strong anti-interference capability
       Electrical protection: Reverse connection protection, overvoltage and current limiting protection
       Performance features: Fast response speed, high long-term stability

2. Split Type Submersible Level Transmitter
       Core sensor: Grade A diffused silicon pressure sensitive element
       Installation method: Split cable, convenient for on-site layout
       Signal processing: German imported chip, wide voltage power supply
       Protection measures: Anti-clogging, anti-scaling, lightning protection, strong anti-interference capability
       Electrical protection: Reverse connection protection, overvoltage and current limiting protection
       Performance features: Good stability, fast response speed

3. High Temperature Submersible Level Transmitter
       Core sensor: Imported diffused silicon pressure sensitive element + advanced isolation diaphragm
       Installation method: Stainless steel capillary tube directly submersed into the site
       Signal processing: Integrated chip, wide voltage power supply
       Protection measures: Anti-clogging, anti-scaling, high temperature resistance, lightning protection, strong anti-interference capability
       Electrical protection: Reverse connection protection, overvoltage and current limiting protection (current-limited output)
       Performance features: High temperature resistance, long-term stability, high accuracy

Technical Advantages: NiuBoL submersible hydraulic transmitter adopts stainless steel isolation diaphragm pressure sensing element, combined with laser resistance trimming process to achieve zero point and sensitivity temperature compensation. The output signal is stable and reliable, with minimal long-term drift, suitable for industrial automation and high-demand level monitoring.

Working Principle of Submersible Hydraulic Transmitter

The measurement principle of submersible hydraulic transmitter is based on the proportionality between liquid static pressure and liquid level height:

• The sensor is immersed in the liquid and senses the liquid static pressure

• The pressure signal is converted into an electrical signal by the sensor

• The internal amplification circuit converts the electrical signal into a standard output (4–20 mA or RS485)

• The host computer or monitoring system receives the signal to achieve real-time display and monitoring of liquid level or hydraulic data

This principle enables the submersible hydraulic transmitter to perform non-contact measurement, with strong anti-interference capability and rapid response, suitable for long-term online monitoring.

Technical Parameters of Submersible Hydraulic Transmitter

• Power supply voltage: DC 24V (supports wide voltage)

• Output signal: 4–20 mA / RS485

• Measurement range: Customized according to on-site liquid level height

• Accuracy: ±0.2%FS ~ ±0.5%FS

• Operating temperature: -20°C ~ +80°C (higher for high temperature type)

• Protection grade: IP68

• Material: Stainless steel isolation diaphragm, corrosion resistant

• Long-term stability: ≤±0.2%FS/year

Installation and Calibration Methods for Submersible Hydraulic Transmitter

Unscrew the protective cover, connect standard 24V DC power supply and high-precision digital current meter
Immerse the sensor into the liquid, adjust full-scale output to 20.000 mA
Repeat adjustment 2–3 times to ensure stable output
Verify 25%, 50%, 75% signals to ensure error is within allowable range
For non-water media, calibrate according to density adjustment (e.g., for density 1.3 medium, 1 m range calibrated as 1.3 m water level)
After adjustment, tighten the protective cover
Recommended calibration cycle: once per year

Installation Precautions:

• Ensure good cable shielding and reliable grounding to avoid electromagnetic interference

• Avoid long-term exposure to impact or strong bubble interference areas

• Use high temperature type or isolation diaphragm type in high temperature or corrosive environments

Application Scenarios and Cases of Submersible Hydraulic Transmitter

• Urban water supply and drainage: Online monitoring of pump station and water plant levels

• Power engineering: Hydraulic system pressure measurement and control

• Chemical/pharmaceutical: Storage tank level monitoring, anti-scaling design ensures long-term stability

• Industrial automation: Real-time monitoring of hydraulic systems in mechanical and electrical plants

• Hydrogeological exploration: Groundwater level monitoring, river channel level management

Case Example: A certain water plant uses split type submersible level transmitter to monitor the outlet level of the pump station. Real-time RS485 data is connected to the SCADA system, realizing automatic alarm for water level exceeding limits and effectively preventing overflow accidents.

Level Meter Technology Comparison and Selection Reference

Selection Guide:

• Select material according to liquid medium (stainless steel / isolation diaphragm)

• Select range according to liquid level height

• Consider environmental factors (temperature, corrosion, bubbles, steam)

• Select output interface (analog 4–20 mA or digital RS485)

• Whether high temperature or high precision model is required

FAQ:

Q1. What liquids can the submersible hydraulic transmitter measure?
Water, oil, and liquids that do not corrode stainless steel can be measured.

Q2. Will bubbles or stirring affect the measurement?
Thick bubbles or strong stirring may weaken the signal, requiring careful installation.

Q3. How to calibrate for non-water media?
Calibrate by converting to water level based on medium density.

Q4. Can the output signal be remotely monitored?
Supports 4–20 mA and RS485, can be connected to PLC or SCADA systems.

Q5. Is it suitable for high temperature environments?
High temperature type can withstand high temperature environments, using isolation diaphragm and stainless steel capillary tube.

Q6. What is the maintenance cycle?
Recommended calibration once per year, with low routine maintenance.

Q7. How to prevent scaling and clogging?
Uses stainless steel isolation diaphragm and anti-clogging design.

Q8. Is the response speed fast?
Fast response speed, suitable for real-time online monitoring.

Summary

NiuBoL submersible hydraulic transmitter achieves precise measurement of liquid level and hydraulic pressure through high-precision sensors, isolation diaphragm technology, and intelligent signal processing.

• Strong anti-interference capability

• High long-term stability

• Easy installation and commissioning

• Suitable for various industrial and water utility scenarios

With reasonable selection, installation, and calibration, the submersible hydraulic transmitter can significantly reduce maintenance costs, improve monitoring efficiency, and ensure process safety. It is a reliable choice for liquid level measurement in industrial automation, water utilities, chemical industry, and hydrogeological exploration.