Introduction of electromagnetic flowmeter electromagnetic flowmeter is Huaneng Automation Instrument Co., Ltd. stereotyped products, the electromagnetic flowmeter measurement principle is based on the Faraday electromagnetic law of programming, the use of single-chip embedded technology to realize the digital excitation, but also can be equipped with a 4-20MA current output signal to record or mediate the use of the sensor is composed of the following: measuring tube, electrode, excitation coil, core and shell composition. HNLD type electromagnetic flowmeter is mainly used to measure the volume flow of conductive liquids and liquids in closed pipelines, liquids, including acidic liquids, alkaline liquids, saline and other corrosive liquids, is widely used in the chemical industry, petroleum, textile, papermaking, metallurgy, pharmaceuticals, and water treatment, environmental protection, municipal management, water conservancy construction, and other industrial fields. Orifice plate flowmeter introduction orifice plate flowmeter for Jiangsu Huaneng Automation Instrumentation Co., Ltd. stereotyped products, the orifice plate flowmeter is a newly developed flow differential pressure generator, which throttle device including orifice plate core and nozzles, etc., supporting the differential pressure transmitter or pressure transmitter, the three-valve blocking, condenser can be measured in the pipeline a variety of fluids in the flow rate can be measured, can be measured in the media are liquids, gases, steam, are widely used in It is widely used in petroleum, chemical industry, metallurgy, light industry, coal mining and other industrial sectors.