Digital Turbine Flow Meters for Liquid & Gas
Sino-Inst provides Digital Turbine Flow Meters for various industries, suitable for liquid or gas flow measurement. Get accurate, cost-effective and reliable flow measurement!
● High accuracy, the measurement accuracy of liquid turbine flowmeter can generally reach ±1%R, ±0.5%R; the accuracy of gas turbine flowmeter can generally reach ±1%R, ±1.5%R;
●Wide range ratio, 10:1~20:1;
● Compact and lightweight structure, easy installation and maintenance, large circulation capacity;
● Suitable for high-pressure measurement, no holes are required on the instrument body, and it is easy to make a high-pressure instrument;
● There are many types of special sensors, which can be designed according to the special needs of users. For example, low-temperature type, two-way type, underground type, special type for sand mixing, etc.;
● Can be made into insertion type, suitable for large diameter measurement. The pressure loss is small and the price is low. It can be taken out without interruption and is easy to install and maintain.
Digital Turbine Flow Meters Series Products
Sino-Inst supplies turbine flow meters including liquid turbine flow meters and gas turbine flow meters.
Liquid turbine flowmeters made of all stainless steel can be used to measure clean and low-viscosity liquids, such as water, alcohol, methanol, etc. The turbine flowmeter made of all PTFE can be used to measure all corrosive liquids such as acid, alkali and salt solutions. Other parameters such as pressure, temperature, connection size, etc. can be customized.
Gas turbine flow meters are mainly used to measure the instantaneous flow and cumulative flow of general clean gases such as natural gas, air, hydrogen, and nitrogen.
The measurement accuracy of turbine flowmeter is relatively high, generally reaching ±0.5%FS. This is mainly due to the fact that the rotation speed of the turbine is proportional to the flow rate, thus improving the accuracy of the measurement.
Turbine flow meters have fewer parts and are simple in structure, so they have high reliability. In addition, it uses wear-resistant materials such as magnetic bearings to extend its service life.
Turbine flow meters have a variety of output modes, such as pulse output, 4-20mA current output and HART protocol output, etc. This makes it easy to interface with a variety of control systems
The turbine flowmeter can be made into a closed structure, and its rotational speed signal is measured non-contactly, so it is easy to implement a high-pressure resistant design. If the turbine and bearings of the flow meter are made of materials with high temperature resistance and small thermal expansion coefficient, they can be used in a wider temperature range.
Choose Digital Turbine Flow Meters for Liquid & Gas
As a manufacturer of Digital Turbine Flow Meters, Sino-Inst has many years of experience in flow meter production. We provide customized turbine flowmeter solutions for various industries.
Liquid turbine flowmeter, DN2~DN300, is used to measure the volume flow and accumulation of low-viscosity, non-corrosive, clean liquids in closed pipelines. High temperature, low temperature, high pressure and other special working conditions can be customized.
Gas turbine flowmeter, DN20~DN300, available in aluminum alloy and stainless steel materials, with optional temperature and pressure compensation.
Turbine flowmeters include liquid turbine flowmeters and gas turbine flowmeters
Food hygiene industry
Clamp connection structure design makes cleaning easy. The whole body is made of stainless steel 316L, which has good anti-corrosion and anti-rust capabilities. It is the first choice for fluid measurement in the food industry, pharmaceutical industry and other health industries.
High pressure liquid measurement
High-pressure structure design, up to 40MPa. The high-pressure liquid turbine flowmeter is a special high-pressure flowmeter designed for high-pressure fluid industries such as hydraulic equipment, engineering machinery, and chemicals. The shell is made of stainless steel. The watch has a simple structure and optimized structural design. It adopts high-pressure butt welding flange clamping or high-pressure threaded connection structure.
High temperature-extremely low temperature liquid measurement
The high-temperature style turbine flowmeter can meet the measurement requirements of high-temperature fluids from -20℃ to 180℃. Such as high temperature oil.
The ultra-low temperature turbine flowmeter can meet the low temperature of -196℃. It can measure low-temperature fluids such as liquid nitrogen and liquid oxygen.
Gas flow measurement
Gas turbine flow meters are mainly used to measure the instantaneous flow and cumulative flow of general clean gases such as natural gas, air, hydrogen, and nitrogen.
More Information
The following are the measurement parameters of the liquid turbine flowmeter
| Item | Data |
| Medium | No impurities, low viscosity, no strongly corrosive liquid |
| Nominal diameter | DN2~DN300 |
| Accuracy | ±0.1%,±0.5%,±0.2%(Optional) |
| Flange standard | GB/T 9119-2010, DIN, ANSI, JIS |
| Nominal pressure | Threaded connection DN2~DN40 ≤ 6.3MPa, > 6.3MPa supplied by agreement; Flange connection DN2~DN300≤ 1.6MPa, > 1.6MPa supplied by agreement; Clamp connection DN2~DN50≤ 1.6MPa |
| Output | Pulse, 4-20mA analog output, RS485 (Modbus-RTU protocol), HART |
| Medium temperature | Default type: -20℃~+120℃ (Standard) |
| High temp. type : -20℃~+180℃ | |
| Operation condition | Operating temperature: -20℃~+55℃ |
| Related humidity: 5%~95% RH | |
| Atmospheric pressure: 86kPa~106kPa | |
| Ingress protection | IP65 or IP68 |
| Explosion proof | ExiaIICT4 or ExdIIBT6 |
| Material | Body material: 304, 316L Impeller material: 2Cr13, duplex steel |
| Response time | Pulse output≤5Ms; 4-20mA output ≤1s; RS485 communication ≤0.2s; |
Turbine Flow Meter Working Principle
When the fluid flows through the sensor housing, since the blades of the impeller are at a certain angle to the flow direction, the impulse of the fluid causes the blades to have rotational torque. The blades rotate after overcoming friction torque and fluid resistance. speed is stable after torque balance.
Under certain conditions, the rotational speed is proportional to the flow rate. Since the blade is magnetically permeable, it is in the magnetic field of the signal detector (composed of permanent magnet steel and coils). The rotating blades cut the magnetic field lines and periodically change the magnetic flux of the coil.
This causes an electrical pulse signal to be induced at both ends of the coil. This signal is shaped by the amplifier to form a continuous rectangular pulse wave with a certain amplitude. It can be remotely transmitted to the display instrument to display the instantaneous flow rate or cumulative total volume of the fluid.
Within a certain flow range, the pulse frequency f is proportional to the instantaneous flow rate Q of the fluid flowing through the sensor. The flow equation is:
Q=3600*f/k
In the formula:
f – pulse frequency [Hz]
K – sensor instrument coefficient [1/m³), given by the calibration sheet;
Q – instantaneous flow rate of fluid (under working condition) [m³/h]
3600-conversion factor
The instrument coefficient of each sensor is filled in the calibration certificate by the manufacturer. The K value is set into the matching instrument, and the instantaneous flow and cumulative total can be displayed.
Turbine Flow Meter K Factor
The K coefficient is a flow constant based on certain process parameters. Turbine flowmeters, vortex flowmeters, etc. all have K coefficients.
There are two types of k from different manufacturers: one is k=f/Q, which is the number of vortices generated per unit flow; the other is k=Q/f, which is the flow rate corresponding to each vortex.
The k value is calibrated with factory water. The sensor measures the number of vortices of the instrument and compares it with the volume flow measured by the calibration device to obtain the k value.
Generally, the K coefficient will not change when the flow rate changes, but it should not exceed the upper limit of the flow meter too much.