When the fluid flows into the flowmeter, it is rectified and accelerated by the specialized integrated rectifier at the inlet. Due to the angle between the turbine blades and the fluid flow direction, the turbine generates a rotational torque. After overcoming the friction torque and fluid resistance torque, the turbine begins to rotate. Within a certain flow range, the angular velocity of turbine rotation is proportional to the fluid volume flow rate. According to the principle of electromagnetic induction, a magnetic sensor is used to sense a pulse signal proportional to the volume flow rate of the fluid from a coaxial rotating signal wheel. After amplification, filtering, and shaping, the signal, along with temperature and pressure sensor signals, enters the micro processing unit of the intelligent flow integrator for calculation and processing, and directly displays the volume flow rate and total amount of gas on the LCD screen.
1. High quality alloy turbine with higher flow stability and corrosion resistance;
2. Imported high-quality specialized bearings with long service life;
3. The isolation between the measuring room and the ventilation room ensures the safety of the instruments;
4. It can detect the temperature, pressure, and flow rate of the tested gas, automatically track and compensate for the flow rate, and display the accumulated gas volume under standard conditions (Pb=101.325KPa, Tb=293.15K). It can also query the temperature and pressure values in real time;
5. Wide flow range (Qmax/Qmin ≥ 20:1), good repeatability, high accuracy (up to 1.0 level), low pressure loss, low starting flow rate, up to 0.6m3/h;
6. Intelligent instrument coefficient multi-point nonlinear correction;
7. Built in pressure and temperature sensors, high safety performance, compact structure, and beautiful appearance;
8. The instrument has explosion-proof and protective functions, with an explosion-proof mark of Exd Ⅱ CT6 and a protection level of IP65;
9. The system operates with low power consumption, and a 3.2V10AH lithium battery can be used continuously for more than 3 years;
10. The instrument coefficient and cumulative flow value will not be lost for ten years after power failure.
Execution standards | Measurement of Gas Flow in Closed Pipelines - Gas Turbine Flowmeters (GB/T8940-2003) |
Instrument diameter (mm) And connection method | 25、40、50、65、80、100、125、150、200、250、300、Adopting flange connection |
25、40、50Threaded connection can be used | |
Accuracy | ±1.5%R（±1%R Special needs to be made） |
Range ratio | 1：10；1：20；1：30 |
Instrument material | Table body: 304 stainless steel or cast aluminum |
Impeller: anti-corrosion ABS or high-quality aluminum alloy | |
Converter: Cast aluminum | |
Applicable conditions | Medium temperature:-20℃～+80℃ |
Environmental temperature:-30℃～+60℃ | |
Relative humidity:5%～90% | |
Atmospheric pressure:86kpa～106kpa | |
Working power supply | A. External power supply: 24VDC ± 15%, ripple ≤ ± 5%, suitable for 4-20mA output, pulse output, RS485 |
B. Internal power supply: 1 set of 3.0V10AH lithium batteries, which work normally when the battery voltage is between 2.0-3.0V | |
When the voltage is below 2.0, an undervoltage indicator appears | |
Whole machine power consumption | A. External power supply: ＜ 1W |
B. Internal power supply: average power consumption ≤ 1W, can be used continuously for more than 3 years | |
Signal output function | Pulse signal, 4-20mA current signal, control signal |
Communication output function | RS485 |
Real time recording function | Start stop record, diary record, and fixed time interval record |
Signal line interface | Internal thread M20 × 1.5 or other |
Explosion proof grade | ExdIICT6 |
Protection level | IP65 |
