This Variable Area Flow Meter For Air is a speed flow meter. It uses the Karman vortex theory to measure the flow rate of a fluid by using a piezoelectric crystal to detect the vortex frequency generated by a fluid passing through a triangular prism in a pipe.
This Variable Area Flow Meter For Air is a speed flow meter. It uses the Karman vortex theory to measure the flow rate of a fluid by using a piezoelectric crystal to detect the vortex frequency generated by a fluid passing through a triangular prism in a pipe.
Air vortex flowmeters have many advantages as air flow measurements. It has high accuracy, simple structure, convenient installation and good reliability. This device has a pulse frequency signal whose output is proportional to the flow measurement value, and has no zero drift, which is convenient for flow accumulation measurement and its pressure loss is small.
Specifications
| Measurement Type | Differential Pressure and Static Pressure |
| Accuracy | 0.40 Beta: ±0.75% of flow rate / 0.50 & 0.65 Beta: ±1.15% of flow rate |
| Stability | Up to ±0.15% of Upper Range Limit (URL) for 15 years |
| Warranty | Up to 15-year limited warranty |
| Rangedown | Up to 200:1 (14:1 flow turndown) |
| Measurement Range | Up to 2000 psi (137,89 bar) differential, Up to 3626 psia (250,00 bar) absolute, Up to 3626 psig (250,00 bar) gage |
| Line Size | 2 to 12 in. (50 to 300 mm) |
| Output | Differential pressure, static pressure, scaled variable |
| Communication Protocol | WirelessHART |
| Process Wetted Material | 316 SST |
| Diagnostics | Basic Diagnostics |
| Certifications/Approvals: | NACE, hazardous location, see full specs for complete list of certifications |
| Update Rate | 1 sec. to 60 min., user selectable |
| Power Module Life | Up to 10-year life, field replaceable (order separately) |
| Wireless Range | Long range (225 m), extended range (800 m), remote (225 m) and high-gain remote (1 km) |
Features
1. The probe seal of the Variable Area Flow Meter For Air is made of ultra-soft special-shaped non-standard metal sheet, so the sealing is good, and no water leakage will be caused.
2. Designed for superheated steam, the ultra-high temperature probe has a temperature resistance of 450 °C. It uses imported high-temperature materials and clever structures for special process packaging.
3. The probe adopts four crystal package structure, and the shock resistance is obviously enhanced.
4. The generator body is molded by injection, mass production, and low cost.
5. The steam calculation software is burned in the module chip to automatically display the mass flow. It displays temperature, pressure, density, and flow values online.
6. The product has a history record query function, display daily report, monthly report, annual report: it is convenient for users to make metering settlement.
7. It also has a power failure record query function, showing the power outage time and number: it is convenient for users to calculate the unmeasured flow and prevent the phenomenon of stealing steam.
