What are the limitations on flow ranges for low flow gas mass flowmeters?

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Small flow gas mass flow meter, as its name implies, is used to measure the flow of pipes with small flow values. Each flowmeter has its own measurement range, and flow rates outside the measurement range cannot be measured accurately. This article will introduce to you the limitations of the measurement range of thermal gas mass flow meters used for small flow measurements.

Minimum measurement range limitation: The minimum measurement range of flow meters with different calibers is different. The minimum flow value that the thermal gas mass flowmeter can measure is 0.5Nm³/H for a pipe with a diameter of 10mm. Below the minimum measurement flow, measurement accuracy may be affected because the sensor may not be able to reliably detect and record extremely small gas flows.

Maximum measuring range limitation: Whether it is a large flow meter or a small flow meter, they have a maximum measuring range. If the gas flow rate exceeds the upper limit of the flow meter design, it may cause the instrument to be overloaded or unable to measure accurately. For example, the maximum measuring range of a thermal gas mass flow meter for a DN20 small-diameter flow meter is 100Nm³/H.

The specific values ​​mentioned above are all within the flow range under standard conditions (standard conditions are 20°C, 101.33KPa). Before purchasing a small flow meter, you must first consult the manufacturer to see if it can be used on-site. working conditions.