Xizheng brand digital high-precision intelligent liquid turbine flowmeter

Xizheng brand digital high-precision intelligent liquid turbine flowmeter

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 rate. Due to the magnetic conductivity of the blades, they are in the magnetic field of signal detection (composed of magnetic steel and coils). The rotating blades cut the magnetic field lines and periodically change the magnetic flux of the coil, causing electrical pulse signals to be induced at both ends of the coil. This signal is amplified and shaped by an amplifier to form a continuous rectangular pulse wave with a certain amplitude, which can be transmitted to a display instrument remotely to display the instantaneous flow rate and cumulative amount 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:

k

f

Q  3600

Where:

F - Pulse frequency [Hz];

K - Instrument coefficient of sensor [1/m3]

]Provided by the verification form. If [1/L] is used as the unit

k

f

Q  3.6

Q - Instantaneous flow rate of fluid (under working conditions) [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

In the display instrument, instantaneous flow rate and cumulative total amount can be displayed.

4、 Main technical performance:

1. nominal diameter: (4~200) mm, for DN-200 and above, plug-in type is selected;

2. Medium temperature: normal temperature type (-20~80) ℃, high temperature type (-20~150) ℃;

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. Pulse output type: The distance from the sensor to the display instrument can reach 250 meters;

9.4-20mA output type: The distance from the transmitter to the display instrument can reach 500 meters;

10. 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, RS485 communication function can be installed.

Sensor based flow measurement, temperature and flow rate integrated turbine flowmeter

Xizheng brand digital high-precision intelligent liquid turbine flowmeter