product overview Product overview

The LF-14D series electromagnetic flowmeter integrates the sensors and converters of traditional electromagnetic flowmeters into one, with a compact appearance and flexible installation. It is operated by an infrared remote control and easy to install and debug. It is widely used in various industries to measure the volume flow rate of conductive liquids with a conductivity greater than 2.5uS/cm. It is an inductive instrument for measuring the volume flow rate of conductive media. Adopting ARM Cortex-M3 32-bit processor and 24 bit ADC data acquisition system, it has fast computing speed and high accuracy. The instrument has self diagnostic functions such as air traffic control detection, excitation return fault, and flow alarm. The sensor uses imported PEEK material as the inner lining, and the electrode and PEEK inner lining adopt a one-time injection molding process, ensuring the consistency and reliability of product production.

Product principle THE PRODUCT PRINCIPLE

Electromagnetic flowmeter is based on Faraday's law of electromagnetic induction, which states that a conductor moving in a magnetic field will generate an induced voltage. liquidCan be regarded as a conductor; The magnetic field is generated by an energized coil outside the flow tube. The amplitude of induced voltage is directly proportional to the velocity of the conductor, the type of conductor, the diameter of the pipeline, and the strength of the magnetic field. Its value is:
E=B*V*D*K
In the formula:
E - Induced potential;
B - Magnetic induction intensity;
V - velocity of conductive fluid movement;
D - electrode spacing; (Measuring the inner diameter of the tube)
K - Coefficient related to magnetic field distribution and axial length (instrument coefficient);
Among them:
B. D and K can be fixed values or calibrated, simplifying the equation to E ∝ V.
The sensor uses the induced potential E as a flow signal, which is transmitted to the converter. After signal processing such as amplification, transformation, and filtering, the instantaneous flow rate and accumulated flow rate are displayed on a backlit dot matrix liquid crystal display

performance index TECHNICAL PARAMETERS

Execution standard: Electromagnetic flow sensor (JB/T9248-2015)
Verification regulation: Electromagnetic flowmeter (JJG1033-2007)
Tested medium: Conductive liquid (conductivity not less than 2.5uS/cm)
Flow meter lining: polyetheretherketone (PEEK) lining
Flow meter diameter: DN15 to DN50
Pressure: -0.1MPa to 6.3MPa
Electrode material: 316L
Body material: 304, 316L
Electrical connection: M12-4-core connector
Pipeline interface: default to British external thread. Other interfaces can be customized.
Accuracy level: ± 0.3% FS
Corresponding repeatability: ≤ 0.1%
Output signal: 4-20mA (maximum load 500 Ω)
Range ratio: 1:150
Power supply: 18-30VDC
Power consumption: 5W
environmental condition
Environmental temperature: -10 ℃ to+60 ℃
Storage temperature: -25 ℃ to+85 ℃
Relative humidity: 5% to 95%
Protection level: IP65/IP67
Measurement range:

External dimensions APPEARANCE OF SIZE

INSTALLATION REQUIREMENTS INSTALLATION

Installation of electromagnetic flowmeter on pipelines:
The positive direction of flow should be consistent with the positive direction indicated by the arrow on the sensor. a. Bolts and nuts: To facilitate installation, ensure sufficient installation space near the pipe flange. b. If the medium temperature or ambient temperature exceeds 50 ℃, protective measures should be taken to prevent overheating of the shell during installation to avoid burns caused by personnel touching

Electrical Connection: There are two types of electrical connectors provided to users: M12 connector plug (users can wire themselves to the installation position of the flowmeter and then connect to the plug to connect with the flowmeter) M12 electrical connection cable (default length of 2 meters:)

To avoid measurement errors caused by gas entrapment, please install the flowmeter at the following locations: