When the airflow enters the flowmeter, it first passes through a rectifier with a special structure and accelerates. Under the action of the fluid, the turbine overcomes the resistance torque and friction torque and starts to rotate. When the torque reaches equilibrium, the speed is stable, the speed of the turbine is proportional to the gas flow, and the magnetic field is periodically changed by the magnet on the rotating signal disk, so that the pulse generator outputs a pulse signal with a frequency proportional to the flow rate. The microprocessor in the converter counts and calculates the pulse signal to obtain the working flow, and at the same time detects the temperature and pressure of the medium, converts the working volume flow into the standard volume flow according to the volume correction model and accumulates it to obtain the standard volume total.
| Instrument caliber | Normal flow range (m3/h) | Maximum pressure loss (kpa) | |
| 25 | S | 4-40 | 1.5 |
| 40 | S | 6-65 | 1.5 |
| 50 | S1 | 7-70 | 1.2 |
| S2 | 10-100 | 1.4 | |
| 80 | S1 | 13-250 | 1.0 |
| S2 | 20-400 | 2.0 | |
| 100 | S1 | 20-400 | 1.0 |
| S2 | 32-650 | 1.5 | |
| 150 | S1 | 50-1000 | 1.0 |
| S2 | 80-1600 | 2.0 | |
| 200 | S1 | 80 -1600 | 0.8 |
| S2 | 130-2500 | 1.5 | |
| 250 | S1 | 130-2500 | 0.8 |
| S2 | 200-4000 | 2.0 | |
| 300 | S | 200-4000 | 1.0 |
| 350 | S | 400-8000 | 1.5 |
| 400 | S | 650-13000 | 2.0 |
| Accuracy | 1 .5%FS(1 .0%FS needs to be customized) | ||
Description:
*1 Maximum pressure loss is the pressure loss when the flowmeter is working at the maximum flow point, the medium is air, and the temperature is normal.
*2 DN20, DN32, DN65, DN125 are non-national standard products and need to be customized.
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