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What is the unit of mass flow meter? Hello, KNKE, a manufacturer of imported flow field meters from the United States, is pleased to answer your question. The gas mass flow unit of the KNKE imported orifice flowmeter from the United States is generally expressed in sccm (Standard Cubic Centimeter per Minute) and slm (Standard Liter per Minute). This means that under different usage conditions, the flow indicated by this instrument is the standard flow rate. The standard state is as follows: air pressure -101325Pa (760mm Hg); Temperature -0 ℃ (273.15K). This is an important difference between this instrument and other flow meters, and it is also where SCCM and SLM differ from mL/min and L/min. For most users, the representation method of volumetric flow rate is very habitual and easy to use, but there are also users who need to know the mass of the medium flowing through per unit time (such as g/min), which is easily achievable. Because the gas density under standard conditions is a constant that can be easily found, a simple multiplication (multiplying the density by several slm) can be performed to achieve it. So, the volumetric flow rate under standard conditions is equivalent to the mass flow rate. 2. Is there a difference between the unit of n cubic meters/h and cubic meters/h for a thermal mass flowmeter?
1. Nm3/h is usually referred to as the standard cubic meter, representing the flow measurement unit under standard conditions.. The standard state refers to the condition where the temperature is 0 ℃ and the pressure is 1 atmosphere (1atm).
2. m3/h represents the flow unit at the actual working temperature and pressure. In engineering practice, Nm3/h is often used to describe the flow
4. "Nm3" under nominal conditions refers to the gas volume at 0 ℃ and 1atm. In actual working conditions, the volume is represented by "m3".
5. Different equipment manufacturers and industries may have different definitions of standard conditions. For example, some compressor samples may indicate standard conditions of 1atm and 20 ℃
6. To accurately convert Nm3/h to m3/h, it is necessary to know the pressure and temperature under actual working conditions. This can be calculated using the ideal gas state equation PV=nRT, where P is pressure, V is volume, n is the amount of substance, R is the ideal gas constant, and T is absolute temperature.
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