



RYB200 Hydrostatic Level Transmitter | 0-400m | 4-20mA RS485 Output
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A. Product Overview
The RYB200 Hydrostatic Level Transmitter is used for continuous liquid level measurement by detecting the hydrostatic pressure generated by the liquid column. It is suitable for measuring water level and liquid level in wells, lakes, water tanks, wastewater plants, reservoirs and industrial process tanks.
This transmitter uses diffused silicon sensing technology as the sensitive element and all-digital circuits for stable and reliable performance. The stainless steel body makes it easy to install and suitable for demanding industrial environments. It is designed with strong anti-interference performance, impact resistance and long-distance signal transmission capability.
The QYB200 supports multiple output options such as 4-20mA, RS485, 0-5V, 0-10V and 4-20mA with HART, making it suitable for PLC, SCADA, data logger and automation system integration. The product offers a measuring range up to 0–400m, IP68 protection, 10–30VDC power supply, and accuracy options of 0.5 percent F.S., 0.2 percent F.S. and 0.1 percent F.S.
B. Working Principle
The RYB200 Hydrostatic Level Transmitter works on the hydrostatic pressure principle. When the transmitter is submerged into a liquid, the liquid height above the sensing diaphragm creates pressure. This pressure is directly proportional to the liquid level.
The internal diffused silicon pressure sensor detects this pressure and converts it into an electrical signal. The all-digital circuit then processes and compensates the signal before transmitting it as a standard output such as 4-20mA, RS485, 0-5V, 0-10V or HART.
In simple terms:
Liquid height creates pressure.
The sensor detects the pressure.
The transmitter converts the pressure into a level signal.
The control system displays or monitors the liquid level.
Because hydrostatic measurement depends on liquid pressure, the transmitter is widely used for tanks, borewells, reservoirs and other applications where continuous liquid level monitoring is required.
C. Why It Is Used
The RYB200 Hydrostatic Level Transmitter is used when continuous, accurate and reliable liquid level monitoring is required. It helps users avoid overflow, dry running, manual level checking and process interruptions.
It is commonly used because it provides:
Accurate liquid level measurement for water and industrial liquids
Reliable performance in submerged applications
Long-distance signal transmission for automation systems
Multiple output options for PLC, SCADA and data acquisition systems
IP68 protection for underwater installation
High stability and repeatable measurement
Reverse polarity protection and current limiting protection
Lightning strike resistance and impact resistance
Compact stainless steel design for easy installation
Cost-effective solution for tanks, wells, lakes and reservoirs
This transmitter is especially useful where the liquid level cannot be checked manually or where real-time level monitoring is required for process control, water management or storage tank safety.
D. Suitable Buyers
The RYB200 Hydrostatic Level Transmitter is suitable for buyers and industries that need continuous liquid level measurement.
Suitable Buyers:
Water treatment plant operators
Wastewater treatment contractors
Industrial automation companies
System integrators
PLC and SCADA panel manufacturers
Tank manufacturers
Pump automation suppliers
Chemical processing plants
Water supply and irrigation projects
Reservoir and dam monitoring contractors
OEM machine builders
Maintenance and utility departments
Environmental monitoring companies
Industrial instrumentation distributors
EPC contractors and project consultants
Suitable Applications:
Water tank level monitoring
Chemical tank level monitoring
Well water level measurement
Lake water level measurement
Reservoir level monitoring
Wastewater tank level measurement
Groundwater monitoring
Storage tank level measurement
Pump control systems
Industrial liquid level automation
Water treatment and sewage treatment plants
Smart agriculture and irrigation systems
FAQ
1. What is the RYB200 Hydrostatic Level Transmitter used for?
The RYB200 Hydrostatic Level Transmitter is used for continuous liquid level measurement in water tanks, wells, lakes, reservoirs, wastewater tanks, chemical tanks and industrial storage tanks.
2. How does a hydrostatic level transmitter measure liquid level?
A hydrostatic level transmitter measures the pressure created by the liquid height above the sensor. The higher the liquid level, the higher the pressure. The transmitter converts this pressure into a standard output signal for level monitoring.
3. Can the RYB200 be used inside water tanks?
Yes, the RYB200 is designed for submerged installation and has IP68 protection, making it suitable for water tanks, wells, lakes and similar liquid level applications.
4. What output signals are available in the RYB200 Hydrostatic Level Transmitter?
The RYB200 supports output options such as 4-20mA, RS485, 0-5V, 0-10V and 4-20mA with HART, depending on the selected model and application requirement.
5. What is the measuring range of the RYB200?
The measuring range is available up to 0–400m, allowing it to be used for different tank depths and water level measurement applications.
6. Is the RYB200 suitable for chemical tanks?
Yes, it can be used for chemical tank level measurement when the selected wetted material, sealing material and cable material are compatible with the liquid. Stainless steel, sealing rubber and optional cable materials should be selected as per the chemical application.
7. What material is used in the RYB200 Hydrostatic Level Transmitter?
The transmitter is available with stainless steel interface material such as SS304 and SS316L, with sealing material options such as nitrile rubber and fluorine rubber.
8. Can the RYB200 be connected to PLC and SCADA systems?
Yes, the RYB200 can be connected to PLC, SCADA, indicator, controller, data logger and automation systems using standard output signals like 4-20mA, RS485 and HART.
9. What power supply is required for the RYB200?
The RYB200 works on a 10–30VDC power supply, making it suitable for industrial control panels and automation systems.
10. Why choose a hydrostatic level transmitter instead of manual level checking?
A hydrostatic level transmitter provides continuous and real-time level measurement. It reduces manual inspection, improves tank safety, helps prevent overflow and supports automatic pump control and process monitoring.




