The intelligent liquid turbine flowmeter (4-20mA, with display) is composed of a turbine flow sensor and a display instrument. It is manufactured by our factory using advanced foreign technology and is one of the most ideal flowmeters for liquid measurement. Flow meters have the characteristics of simple structure, high accuracy, and easy installation, maintenance, and use. This product is widely used in the fields of petroleum, chemical, metallurgy, water supply, papermaking, environmental protection, food, etc. It is suitable for measuring liquids in closed pipelines that do not corrode stainless steel 1Cr18Ni9Ti, 2Cr13, corundum Al2O3, hard alloys, and have no impurities such as fibers or particles. If used in conjunction with display instruments with special functions, it can be used for automatic quantitative control, over limit alarm, and other purposes.

1、 Product features:
1. The sensor is a hard alloy bearing thrust type, which not only ensures accuracy but also improves wear resistance.
2. The structure is simple, sturdy, and easy to disassemble and assemble.
3. Wide measurement range and low lower limit flow rate.
4. Low pressure loss, good repeatability, and high accuracy.
5. Has high resistance to electromagnetic interference and vibration.

2、 Working principle:
The fluid flows through the sensor housing. Due to the angle between the blades of the impeller and the flow direction, the impulse of the fluid causes the blades to have a rotational torque. After overcoming the friction torque and fluid resistance, the blades rotate. After the torque is balanced, the speed is stable. Under certain conditions, the speed is proportional to the flow velocity. Due to the magnetic conductivity of the blades, they are in the magnetic field of the signal detector (composed of * * magnetic steel and coils). The rotating blades cut the magnetic field lines, periodically changing the magnetic flux of the coil, thereby inducing electricity at both ends of the coil
Pulse signal, which is amplified and shaped by an amplifier to form a continuous rectangular pulse wave with a certain amplitude, can be transmitted remotely to a display instrument to display the instantaneous flow rate and cumulative quantity 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, and the flow equation is: Q=3600 × f/k;
Where:
F - Pulse frequency [Hz];
K - the instrument coefficient of the sensor [1/m3], given by the calibration sheet. If [1/L] is used as the unit
Q - instantaneous flow rate of fluid (in working condition) [m3/h];
3600- Conversion factor.
The instrument coefficient of each sensor is filled in the calibration certificate by the manufacturer, and the k value is set in the matching display instrument to display the instantaneous flow rate and cumulative total amount.

3、 Main technical performance:
1. Nominal diameter: (4-200) mm. Basic parameters are shown in Table 1;
2. Medium temperature: (-20~80) ℃, (-20~120) ℃;
3. Environmental temperature: (-20~55) ℃;
4. Accuracy: ± 0.2%, ± 0.5%, ± 1%;
5. Detector signal transmission line system: three wire voltage pulse (three core shielded cable);
6. Power supply: Voltage: 12V ± 0.144V, Current: ≤ 10mA;
7. Output voltage amplitude: High level ≥ 8V, low level ≤ 0.8V;
8. Transmission distance: The distance from the sensor to the display instrument can reach 250 meters;
9. On site display power supply: 3V (powered by lithium battery, can be used continuously for 3 years);
10. Display mode: On site LCD displays instantaneous flow and cumulative flow;
11. On site display with signal output power supply: 24V; 4-20mA two-wire current output, remote transmission distance of 500 meters.

Basic Parameters

2. Flow range and working pressure

Turbine flowmeter selection table