Working Principle
The measurement principle of intelligent
electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. That is, when a conductive liquid flows through the electromagnetic flowmeter, a voltage proportional to the average flow velocity V (volume flow rate) will be generated in the conductive liquid. The induced voltage signal is detected by two electrodes in contact with the liquid, transmitted to an amplifier through a cable, and then converted into a unified output signal.
Key Features
■No move assembly,no abrasion
■No flow enhance equipment
■Suits for various of electronic conductivity liquid
■No affect from temperature,viscosity,pressure and density
■Anti-corrosion
■Measure both to and reverse flow
■Huge display,easy operate
■Long-term EEPROM to save data when lose power
■Support MODBUS/HART communication protocol
■Wide working volts range
■Self diagnose
Advantages
1. Excitation alarm, empty pipe alarm, and flow over-limit pricing
2. Bidirectional metering capability
3. Lithium battery or dual power supply available
4. Accuracy up to 0.5%
5. Flow rate can be displayed precisely.
Disadvantages
1. Cannot use non-conductive media
2. Cannot display mass units
3. Limited by upstream and downstream piping
4. Cannot be used for metering minute liquids
5. Cannot directly output alarm signals from the meter head
Applications
■Pure water,sewage water
■Electronic manufacture and assign
■Chemistry and industrial medicine
■Food industry
Conclusion
Electromagnetic flow meters offer high accuracy, reliability, and adaptability in the field of conductive liquid flow measurement. Their zero-moving-parts design eliminates wear and pressure loss, and the measurement is unaffected by changes in fluid density, viscosity, temperature, and pressure, making them particularly suitable for harsh conditions such as wastewater, corrosive media, and slurries containing particles. Although they cannot measure non-conductive media and have certain installation requirements, with advancements in intelligence and improved communication protocols, electromagnetic flow meters have become indispensable flow measurement devices in industries such as water treatment, chemical engineering, and food processing.
