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In today’s era of rapid industrial development, turbine flowmeters, as commonly used measuring instruments in industrial applications, have brought great convenience to this rapid growth. However, during the measurement process, flow meters cannot be used in all locations; in some places, the nature of the medium being measured leads to inaccurate results. Below are some situations where turbine flow meters are not suitable for use. When measuring liquids, if the pipeline pressure is low while the flow rate is high, the pressure on the downstream side of the instrument may approach the saturation vapor pressure, posing a risk of cavitation. For example, when liquid ammonia flows freely from a high-level tank due to its potential energy, it is not suitable to install sensors at the discharge point. Fluids containing many impurities, such as circulating cooling water, river water, wastewater, and fuel, are also problematic. Locations where the flow rate changes rapidly, such as boiler water supply systems or air hammer-prone gas supply systems, are another issue. Areas with severe electromagnetic interference, such as those near welding machines, electric motors, and relay devices with contacts, are also unsuitable. In situations where the length of the straight sections upstream and downstream is insufficient, such as inside a ship’s engine room, frequent starting and stopping of pumps in boiler automatic water supply systems can cause shocks to the impellers, leading to rapid damage of the sensors. Careful consideration should be given when selecting sensors for use with corrosive or abrasive media; it is best to consult the manufacturer first.