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1. What is compressed air flow meter mainly used to measure? Compressed air flow meter is mainly used to measure the instantaneous flow rate, cumulative bending flow rate, and gas parameters under working conditions of compressed air. 1. Core measurement object • Volume flow rate: the air flow rate under standard operating conditions (20 ℃, 1atm) or actual operating conditions, usually measured in Nm ³/h or m ³/h. • Mass flow rate: calculated through temperature and pressure compensation, commonly used in kg/h per buried slag position. • Cumulative flow rate: used to calculate energy consumption or production, such as the total output of an air compressor. 2 Key parameter measurement • Pressure range: 0-1.6 MPa (for conventional industrial use) or special high-pressure models • Temperature range: -20 ℃~80 ℃ (for models with PT100 temperature sensors) • Accuracy level
1.5 level (economic type) or 1.0 level (high-precision type) 3 Typical application scenarios - Air compressor outlet flow monitoring - Pneumatic equipment gas consumption detection - Compressed sock source air pipe network balance debugging - Energy Management System (EMS) data acquisition 4. Technical implementation methods: Thermal mass flow meter (direct measurement of mass flow) Vortex flow meter (with temperature and pressure compensation) Ultrasonic flow meter (non-contact measurement) Note: GB/T 34036-2017 standard in 2023 stipulates that industrial gas flow meters must have Modbus RTU communication protocol.
2. What flow meter is used to measure compressed air? There are various instruments that can be used to measure air, but the actual air flow rate used on site is not diverse according to their principles. The most important ones
1、 When measuring compressed air, flow meters are usually installed in compressor rooms and blower rooms, and the vibrations generated by the compressor and blower will be transmitted to distant places through air pipes or ducts. Vibration causes the vortex flow sensor to generate interference signals corresponding to the same vibration frequency, resulting in significantly higher flow readings.
2、 Compressed air is taken from the atmosphere, which always contains a certain amount of water vapor. A larger orifice flow meter with a good four diameter orifice plate is used to measure the flow rate of compressed air. There is often water accumulation in front of the orifice plate, which affects the measurement accuracy. There is often a section of water in the pressure pipe, which causes the differential pressure measured by the differential pressure transmitter to be inconsistent with the differential pressure generated by the throttling device. These are common reasons for errors caused by air carrying water.
3、 The fluid at the outlet of compressors and blowers mostly contains some pulsation. Fluid pulsation can cause high readings in various flow meters such as differential pressure flow meters, vortex street flow meters, etc., leading to rotor jumping up and down in rotor flow meters. In order to eliminate the influence of pulsation, a buffer tank is usually installed at the outlet of the compressor to filter out pulsation, and the flowmeter is installed behind the buffer tank; Or install the flow meter away from the pulsation source.
4、 The average speed high flow tube f
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