Flow meters

1. Definition: 
Flow meters are industrial automation instruments used to measure the instantaneous or cumulative flow rate of fluids (liquids, gases, steam) in pipelines or open channels. They convert fluid velocity, volume, or mass into readable and transmittable signals through various physical principles, enabling flow measurement and monitoring.

2. Key Features: 

• Measurement accuracy: Different types have varying accuracy levels, meeting diverse needs such as trade settlement, process control, and general monitoring
• Range ratio: The ratio of the maximum to minimum flow rate that can be stably measured, with a wider range ratio indicating greater adaptability
• Pressure loss: Some structures generate flow resistance, affecting pipeline pressure; low-loss types are more energy-efficient
• Media adaptability: the ability to accommodate liquids, gases, vapors, high-viscosity, corrosive, and particulate-containing media
• Output signals: Support analog, pulse, and digital communication (4-20mA, RS485, Modbus, etc.)
• Installation requirements: Different conditions apply to straight pipe sections, installation orientation, and full-flow media states
• Reliability: Anti-interference, temperature and pressure resistance, long-term stability, and maintenance-free degree

3. Applicable Industries: 

• Petrochemicals: Crude oil, refined oil products, natural gas, chemical raw materials, steam measurement
• Water Treatment / Environmental Protection: Flow monitoring of tap water, sewage, wastewater, and reclaimed water reuse
• Power Energy: Boiler feedwater, steam, cooling water, gas, flue gas desulfurization and denitrification fluid metering
• Metallurgy and Steel: Measurement of cooling water, circulating water, gas, oxygen, nitrogen, and combustion-assisting gases
• Food and Pharmaceuticals: Hygienic fluid metering for purified water, beverages, medicinal liquids, syrups, alcoholic beverages, etc
• HVAC: Heating, hot water, cold water, flow metering and energy consumption monitoring for heat exchange stations
• Papermaking and Textile Industry: Process water, pulp, additives, and steam flow control
• Gas Industry: Urban Gas, Industrial Gas, LNG, Compressed Air Measurement
• Ships, rail transit, laboratories: fluid testing, fuel consumption, test flow monitoring