Electromagnetic flowmeter

KNKE electromagnetic flowmeter (EMF) is a type of flowmeter that measures the flow rate of a liquid or slurry in a pipe using the principle of electromagnetic induction. It is also known as a magmeter.

An EMF consists of a tube made of a non-conductive material, such as plastic or ceramic, which is lined with a conductive material, such as metal. Two electrodes are inserted into the tube, one at each end, and an alternating magnetic field is applied to the electrodes. When the conductive liquid flows through the tube, it generates a voltage across the electrodes, which is proportional to the velocity of the liquid.

The voltage signal is then converted into a flow rate by the EMF's electronics. EMFs are commonly used in industrial applications where the liquid being measured is conductive and where the flow rate needs to be measured accurately and reliably, such as in water treatment plants, chemical processing plants, and food and beverage production facilities. EMFs are also preferred in applications where the liquid being measured is dirty or contains solids that could clog other types of flowmeters.

An electromagnetic flowmeter is a device used to measure the flow rate of conductive fluids (liquids or gases) in a pipe or a conduit. It works on the principle of Faraday's law of electromagnetic induction, where an electrical conductor moving through a magnetic field will experience a voltage across its ends. The magnitude of this voltage is proportional to the velocity of the conductor, which in this case is the fluid.

The parameters of KNKE electromagnetic flowmeter that are commonly specified are:

1. Flow rate range: The minimum and maximum flow rate that the      flowmeter is capable of measuring accurately. This is typically specified      in units of volume or mass per unit time, such as liters per minute or      kilograms per hour.
2. Pipe diameter range: The range of pipe diameters for which the      flowmeter is designed. This is important because the performance of the      flowmeter can be affected by the diameter of the pipe in which it is      installed.
3. Fluid conductivity: The flowmeter is designed to measure the      flow of conductive fluids, so the conductivity of the fluid being measured      is an important parameter. This is typically specified in units of Siemens      per meter (S/m).
4. Operating temperature range: The range of temperatures at which      the flowmeter can operate reliably. This is important because the      properties of the fluid being measured can change with temperature, which      can affect the performance of the flowmeter.
5. Accuracy: The accuracy of the flowmeter is typically specified      as a percentage of the actual flow rate. This can vary depending on the      manufacturer and the specific model of the flowmeter.
6. Output signal: The flowmeter typically provides an electrical      signal that can be used to measure the flow rate, such as a voltage or a      current signal. The type of signal and the range of the signal are      important parameters to consider when integrating the flowmeter into a      larger measurement and control system.
7. Power supply: The flowmeter requires an external power supply      to operate, typically provided by a DC voltage source. The voltage range      and power consumption of the flowmeter are important parameters to      consider when selecting a power supply.
8. Installation requirements: The installation requirements for      the flowmeter can vary depending on the specific model and the      application. Some flowmeters require a straight pipe section upstream and      downstream of the flowmeter to ensure accurate measurements, while others      may have different installation requirements.
9. Materials of construction: The materials used in the      construction of the flowmeter are important to consider, especially if the      fluid being measured is corrosive or abrasive. The materials of      construction can also affect the range of temperatures and pressures at      which the flowmeter can operate.