Flange Connected Turbine Flow Meter Sensor China
Electromagnetic flow meters, or magmeters, are comprised of a transmitter and sensor that together measure flow. The magnetic flow meter’s sensor is placed inline and measures an induced voltage generated by the fluid as it flows through a pipe. The transmitter takes the voltage generated by the sensor, converts the voltage into a flow measurement and transmits that flow measurement to a control system.
A magmeter utilizes a set of coils and a pair of electrodes for flow measurement. The meter’s coils are driven by the transmitter with an applied current. Once powered, a magnetic field is formed between both coils. When the pipe is full and the fluid begins to flow, the force of the magnetic field causes the negatively and positively charged particles of the fluid to separate as they pass through the magnetic field. This separation causes an induced voltage between the electrodes and sensor.
1.No moving and blocked flow parts in the pipeline, almost no additional pressure loss in the measurement.
2.Measurements results are independent of physical parameters, such as flow distribution, fluid pressure, temperature, density and viscosity.
3.On-site modification of the measuring range available.
4.LCD display, easy to use and simple to operate.
5.Using SMD devices and SMT technology.
6.Using 16-bit embedded processors with fast speed and high accuracy, enhancing the stability of measurement.
7.Anti-interference, reliability, measurement range up to 150:1.
8.Ultra low EMI switch, wide range of power supply voltage.
9.RS485, RS232, Hart and Modbus digital communication signal output.
Working principle of electromagnetic flow meter measurement is based on the Faraday law of electromagnetic induction. Measurements of the flow meter tube is lined with insulating material of a non-magnetic alloy spool. Two clicks along the diameter through-wall fixing on the measuring tube. The electrode head is flush with the lining inner surface. Field coil by waves when pulsed excitation by both parties, will be measured perpendicular
to the pipe axis direction produces a magnetic flux density of the magnetic field b. At this point, if you have
some electrical conductivity of fluid flows through the measuring tube, cut magnetic lines of induction electromotive force e.
Electromotive force e is proportional to the magnetic flux density B, measure the inside diameter d and the product of the mean velocity v. Electromotive force e (traffic signal) checked out by electrodes and cables to the converter. Converter after the traffic signal will be amplified, to display fluid flow and energy output pulse, analog current signals for flow control and the flow adjustment.
E=KBdv Type: E-for signal voltage between the electrodes (v)
B--magnetic flux density (t)
d--measuring tube diameter (m)
v--average flow velocity (m/s)
K, d is a constant, due to magnetizing current is constant, b is constant, the E=KBdv, is proportional to the
signal voltage and volumetric flow Q E-. And volume flow rate sensor signal voltage e Q into a linear relationship. Therefore, as long as the measure to determine the flow rate Q, this is the basic operating principle of electromagnetic flowmeter. By E=KBdv today, the measured flow of medium temperature, density, pressure, conductivity, liquid-solid two phase media of liquid and solid ingredients than parameter does not affect the measurement results.
As for the axisymmetric flow flow state as long as it meets (such as laminar or eddying flow) does not affect the measurement results. Thus volume flowmeter Electromagnetic Flowmeter is a real. For manufacturers and users alike, just use plain water after the actual calibration of measuring volume flow of the fluid any other to the point, without the need for human and remediation. This is electromagnetic flowmeter to highlight advantages, is not found in any other flow meters. Measuring tube and block parts of inactivity. So there is little pressure loss and extremely high reliability.
|0.5 class, 1.0 class
|Measured medium temperature
|Common rubber lining: -20~+60 ° c
|High temperature rubber lining: -20~+90 ° c
|PTFE lining: -30~+100 ° c
|High temperature vinyl lining: -30~+180 ° c
|Rated working pressure
|pipeline: DN10~DN65: ≤ 2.5MPa;DN80~DN150: ≤ 1.6MPa;
DN200~DN1200: ≤ 1.0MPa
|Flow rate range
|Measured fluid conductivity
|4~20mA / 4~20mA + Hart
|316L, titanium (Ti), tantalum (Ta), Hastelloy (H),
Platinum (Pt) or other special electrode materials
|Working power supply
|85~265VAC / 24VDC / Battery
|Straight pipe length
|pipe: ≥ 5DN in the upper reaches, downstream
of greater than or equal to 2DN
|standard: IP65; IP68(optional)
1.To avoid magnetic field environment, and magnetic device, in case that it affects magnetic and signal output.
2. Dry and ventilated place for installation.
3.Avoid the sun and rain, and high temperature above 60℃ and humidity above 95%
4.Place that easy for installation and moving
5.Flowmeter should be installed behind pump, and valve must be connected with outflow part of flowmeter.
1.Transmitter can be installed on the straight pipe and horizontal pipe
2.full pipe flow to avoid the electrode touching with air.
3.Vertical installation to abrade lining equally to prolong the lifetime, if the medium is mixture of liquid and water.
4.Change installation methods: choose smaller diameter flowmeter if the flow rate doesn't reach the requirement. Change Some part pipe to make diameter same as transmitter's, but straight pipe must be: inflow part≧ 5DN, outflow part≧2DN(DN pipe diameter)