High Pressure Rotameter for Liquids/gas-Upto 25 Mpa

High pressure rotameter is suitable for flow measurement of high pressure liquid and gas.
Standard type rotameter: DN15-DN50, can withstand 4.0MPa. High pressure rotameter: DN15-DN50, can withstand 25MPa. The pressure level of the jacket is 1.6MPa, and the special type should be negotiated with our engineers before selecting and ordering.
High temperature metal tube rotameter can be applied to temperature range: 100℃~450℃
The high-pressure rotameter adopts an advanced magnetic sensor that detects the change of the magnetic field angle without contact. And with a microprocessor system. It can realize liquid crystal indication, accumulation, and remote transmission (4-20Ma). Pulse output, upper and lower limit alarm output and other functions. This type of intelligent signal transmitter has high precision and reliability.

High Pressure Rotameter

The working principle of High Pressure Rotameter:

The high-pressure metal tube rotameter is the force that the upper and lower ends of the float generate differential pressure to form a rising force when the measured medium passes through the conical measuring tube from bottom to top.

When the lifting force on the float is greater than the weight of the float immersed in the fluid, the float will rise. The area of ​​the annulus will increase accordingly. The fluid velocity at the annulus will drop immediately. The differential pressure at the upper and lower ends of the float will decrease. The float is stabilized at a certain height until the lift force is equal to the weight of the float immersed in the fluid.

The height of the float position corresponds to the flow rate of the measured medium.

The float has a built-in magnet. When the float moves up and down with the medium, the magnetic field changes with the movement of the float.

a. For the local type, the rotating magnet in the local indicator is coupled with the magnetic steel in the float to rotate. At the same time, the pointer is driven to indicate the flow rate at this time through the dial.

b. For the intelligent type, the change of the magnetic field is converted into an electrical signal by a solid-state magnetic sensor in the intelligent indicator. After A/D conversion, microprocessor. D/A output, LCD liquid crystal display, to display the flow rate size and cumulative flow.

Extended reading: High Pressure Flow Meters for Liquids-Steam-Gas

High Pressure Rotameter Features:

  1. All-metal structure design. Sturdy, simple, high pressure resistance, high temperature resistance, anti-corrosion, long service life;
  2. Short stroke, total height 250mm, easy installation;
  3. The mechanical pointer indicates the instantaneous flow on the spot. LCD liquid crystal displays the instantaneous flow and cumulative flow;
  4. Intelligent indicator. Using signal acquisition and processing chip, modular design, no magnetic lag;
  5. With data recovery, data backup, power failure protection and error self-diagnosis functions;
  6. HART type indicator, two-wire 24VDC power supply. 4-20mA standard current signal output superimposed with HART protocol;
  7. Parameter configuration and on-site adjustment can be performed through the HART communication hand-held communicator;
  8. Connect with the PC serial port. Through the Windows program, the instrument can be calibrated on site;
  9. Can be used in flammable and explosive hazardous situations;
  10. Various installation forms such as vertical, horizontal, top in and bottom out, bottom in and side out, side in and side out. Flange or threaded connection.

High Pressure Rotameter Applications:

The metal tube rotameter has a simple structure, reliable operation, high accuracy and wide application range. Can withstand higher pressures than glass rotameters.

LZ series flowmeters have local indication, electric remote transmission, limit switch alarm, corrosion resistance, jacket type, damping type and explosion-proof varieties.

It is widely used in the measurement and automatic control of liquid and gas flow in national defense, chemical industry, petroleum, metallurgy, electric power, environmental protection, medicine and light industry and other departments.

Read more about: Benefits Of Digital Gas Mass Flow Meters

What Is Difference Between Rotameter and Flow Meter?

A rotameter is a device that measures the flow rate of liquid or gas in a closed system. It consists of a float that moves up and down in a tube, based on the fluid’s flow rate. The faster the fluid flows, the higher the float rises.

A flowmeter is a device that measures the volume of liquid or gas that flows through it. There are many different types of flowmeters, each designed to measure different types of fluids. For example, positive displacement flowmeters measure the volume of fluid that passes through them, while rotameters measure the rate of flow.

Read more about:

More Featured High Pressure Flow Meters for Liquids-Steam-Gas

Are high pressure flow meters the same as regular flow meters? Can high pressure flow meters be replaced by ordinary flow meters?
Of course not.

You need to measure the flow of fluids under high pressure, but you’re not sure which type of flow meter is best for your application.

Choosing the right flow meter can be difficult, because there are so many different types available on the market. How do you know which one is right for your specific application?

Sino-Inst offers a wide range of high pressure flow meters that are specifically designed to operate in demanding applications. Our high pressure flowmeters are made from stainless steel construction and are ideal when measuring the flow of fluids under high pressures.

Read more about: High Pressure Flow Meters Types


Yes, rotameters are affected by changes in pressure. When the pressure decreases, the rotameter will read a lower flow rate. Similarly, when the pressure increases, the rotameter will read a higher flow rate. This is because the rotameter measures the fluid’s velocity, and changes in pressure will affect the fluid’s velocity. Therefore, it is important to keep the rotameter’s pressure at a constant level if you want to accurately measure the flow rate.

Learn more about Flow Rate And Pressure Formula, which may help you calculate mass or volume flow.

The flow detection element of the rotameter is composed of a vertical tapered tube that expands from bottom to top and a float group that moves up and down along the axis of the tapered tube. Below, I will give you a specific introduction to the classification of rotameters.

Glass rotameter:

Glass rotameters are mainly used in various departments such as the chemical industry, petroleum, light industry, medicine, fertilizer, chemical fiber, food, dyes, environmental protection, and scientific research. Used to measure the flow of single-phase non-pulsating (liquid or gas) fluids. The anti-corrosion glass rotor flowmeter is mainly used for the detection of corrosive liquid and gas medium flow. Such as strong acid, strong acid, oxidant, strong oxidizing acid, organic solvent, and other corrosive gas or liquid medium flow detection.

Extended reading: Gas Rotameter Tips

Plastic tube rotameter:

The main parts such as the liquid plastic tube rotameter cone tube are made of AS, ABS plastic. Has relatively good corrosion resistance. The product also has the characteristics of reasonable structure, small size, lightweight, and the tapered tube is not easily broken. The plastic tube rotor flowmeter can be widely used in chemical, environmental protection, food, and other industrial sectors.

Plexiglass rotameter:

Plexiglass rotameter is divided into panel type plexiglass rotameter and pipeline type plexiglass rotameter.

Plexiglass rotameter also has the characteristics of high transparency, intuitive reading, not easy to break, lightweight, long life, and convenient installation and connection. However, the tapered glass tube of plexiglass cannot be used for organic solvents (such as trichloroethylene, dichloroethane).

Metal tube rotameter:

Metal tube rotameter is divided into on-site pointer indication type and remote transmission type.

Metal float flowmeter is a kind of flow measuring instrument commonly used in industrial automation process control. It has the characteristics of small pressure loss, large detection range (range ratio 10:1), and convenient use. It can be used to measure the flow of liquid, gas, and steam. It is especially suitable for medium flow measurement with low flow velocity and small flow.

Extended reading: Vortex Steam Flow Meter

The metal float flowmeter has a local display type and an intelligent remote transmission type. With pointer display. Instantaneous flow, cumulative flow, liquid crystal display. Upper and lower limit alarm output. Cumulative pulse output, standard two-wire 4-20mA current output, and other forms. Provide users with a very wide choice of space. In addition, the instrument uses a high-quality MCU micro-processing system. Ensure the excellent performance of the flowmeter in various applications.

Extended reading: Beginner’s Guide: Variable area flow meter

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High Pressure Rotameter for Liquids/gas-Upto 25 Mpa is mainly used for small and medium diameter flow measurement. It can measure liquid, gas, steam, etc. Complete product series specifications, in all walks of life are widely used.

Extended Reading: What is difference between rotameter and flow meter

High Pressure Rotameter for Liquids/gas-Upto 25 Mpa can be stable flow measurement without modifying the pipeline. This greatly meets the measurement needs of many applications. From small tubes to large tubes can be used.

Sino-Inst’s High Pressure Rotameter for Liquids/gas-Upto 25 Mpa, made in China, have good quality, with better prices. Our flow measuring instruments are widely used in China, India, Pakistan, USA and other countries.

Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a metal tube flow meters, level sensors, or other equipment, please give us a call.

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About KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects. Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.