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1. What brand of differential pressure transmitter is better for gas flow meters?
1. Rosemount 309
5. Fuji, Rosemount, Honeywell and other brands are better.
2、 Differential pressure transmitter is a transmitter that measures the pressure difference between the two ends of the transmitter. The measured result is pressure difference. The difference between differential pressure transmitters and general pressure transmitters is that they have two pressure interfaces. Differential pressure transmitters are generally divided into positive pressure end and negative pressure end. In general, the pressure at the positive pressure end of the differential pressure transmitter should be greater than the pressure in the negative pressure section in order to measure. Measure the pressure difference between the positive and negative ends of the medium, and convert it into a standard current signal (4-20mA) that can reflect the pressure difference. Differential pressure transmitters are used to measure the liquid level and density of liquids, gases, or vapors. The basic principle of an intelligent differential pressure transmitter is to divide a space into two chambers using sensitive elements (often membrane boxes), and when pressure is introduced into each chamber, the sensor produces displacement (or displacement trend) under the combined action of the two pressures. This displacement is proportional to the pressure difference (differential pressure) between the two chambers and is converted into a standard signal output that can reflect the magnitude of the differential pressure.
3、 The main feature of a gas mass flowmeter is that it is not affected by temperature and pressure fluctuations. It
2. Is Nl/min a unit of airflow? How many cubic meters is it equal to?
NL/min, pronounced as standard liters per minute, means how many liters per minute is the flow rate under standard conditions of 20 degrees Celsius and 1 atmosphere. 1000nl (standard liter)=1m3/min. In the standard state, the pressure is the standard atmospheric pressure, which is 101.325 kPa, both domestically and internationally. However, the temperature is not the same. In China, there are two temperature standards for calculating the mass of unique gases in Tanzania, 20 ℃ and 0 ℃. Additional information: There are three standard states for gases:
1. The standard state agreed upon by the 10th International Conference on Weights and Measures (CGPM) in 1954 is: temperature 273.15K (0 ℃), pressure 101.325KPa. This standard is widely adopted in the field of science and technology around the world.
2、 The International Organization for Standardization and the United States National Standards stipulate that a temperature of 288.15K (15 ℃) and a pressure of 101.325KPa are used as standard states for measuring gas volume flow rate.
3、 The standard orifice plate calculation method for na
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