Introduction: Vortex flowmeter is a volume flowmeter that measures the volume flow of gas, steam or liquid, the volume flow of standard conditions or the mass flow according to the Karman vortex principle. Mainly used for flow measurement of industrial pipeline medium fluid, such as gas, liquid, steam and other media. It is characterized by small pressure loss, large measuring range, high precision, and is almost not affected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring the volume flow of the working condition. No moving mechanical parts, so high reliability and low maintenance. Instrument parameters can be stable for a long time. The vortex flowmeter adopts piezoelectric stress sensor, which has high reliability and can work in the working temperature range of -20℃～+250℃. There are analog standard signals and digital pulse signal output, which is easy to be used with digital systems such as computers. It is a relatively advanced and ideal measuring instrument. Features: 1. No moving parts, long-term stability, simple structure, easy installation and maintenance. 2. The output of the sensor is pulse frequency, its frequency is linear with the actual flow rate of the measured fluid, the zero point has no drift, the performance is very stable, the structure is various, there are pipeline type, Plug-in flow sensor form. 3. High accuracy, usually the measurement accuracy of liquid is ±1.0%; the measurement accuracy of gas is ±1.5%. 4. The measurement range is wide, in the range of Reynolds number of 2×104~7×106, up to 1:20. 5. The pressure loss is small (about 1/4~1/2 of the orifice flowmeter), which belongs to the energy-saving flow meter. 6. The installation method is flexible, and can be installed horizontally, vertically and inclined at different angles according to the on-site process pipeline. 7. The use of noise cancellation circuit and anti-vibration sensor head has certain anti-vibration performance. 8. Using ultra-low power consumption single-chip microcomputer technology, one 3V10AH lithium battery can be used for more than 5 years. 9. The non-linearity of the instrument coefficient is corrected by the software to improve the measurement accuracy. 10. EPROM is used to protect the accumulated flow from power failure, and the protection time is more than 10 years. Technical parameter: Executive standard: Vortex flowmeter (JJG1029-2007) Gauge diameter (mm): 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300 Nominal pressure (Mpa): 1.6Mpa, 2.5Mpa, 4.0Mpa (others can be customized) Accuracy class: Liquid: ±1% Gas or steam: ±1,5%, ±19% Turndown ratio: 1:10; 1:15; 1:20 Sensor material: 304 stainless steel, 316 (L) stainless steel, etc. Use condition signal: Medium temperature: 40℃~+250℃, -40℃~+320 Ambient temperature: 20℃~+60℃ Relative humidity: 5%~95% Atmospheric pressure: 86Kpa~106Kpa Output function: pulse signal, 4~20mA signal Communication output function: RS485 communication output, HART protocol, etc. Working power supply: External power supply: 34VDC± 15%, ripple ≤± 5%, suitable for 4~20mA output, pulse output, RS485 communication output, etc.; Internal power supply: 1 set of 3.1V10AH lithium battery, battery voltage at 2.0V ～3.0V can work normally. Signal line interface: Basic type: Hausman connector or built-in three-core cable: Explosion-proof type: Internal thread M208times, 1.5 Explosion-proof grade: ExiallCT6 or ExdIlBT6 Protection class: IP65 or higher (can be customized)
Introduction: Vortex flowmeter is a volume flowmeter that measures the volume flow of gas, steam or liquid, the volume flow of standard conditions or the mass flow according to the Karman vortex principle. Mainly used for flow measurement of industrial pipeline medium fluid, such as gas, liquid, steam and other media. It is characterized by small pressure loss, large measuring range, high precision, and is almost not affected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring the volume flow of the working condition. No moving mechanical parts, so high reliability and low maintenance. Instrument parameters can be stable for a long time. The vortex flowmeter adopts piezoelectric stress sensor, which has high reliability and can work in the working temperature range of -20℃～+250℃. There are analog standard signals and digital pulse signal output, which is easy to be used with digital systems such as computers. It is a relatively advanced and ideal measuring instrument.
