For steam, gas, and liquids — one meter, multiple media.
Measures volumetric flow by counting vortices shed by a bluff body in the flow path. The shedding frequency is directly proportional to fluid velocity. No moving parts, wide temperature range, and multi-media capability make it ideal for steam and gas service.
Pricing depends on line size, process conditions and configuration — send your requirement and get a quotation from our engineers.
Replies within 30 minutes during business hours (Mon–Sat, 10:00 AM – 6:30 PM IST). Assembled, tested and calibrated by Arrowmech in Surat, India — supplied pan-India and for export.
Maintenance-free operation; ideal for dirty or corrosive fluids.
Liquids, gases, and steam: one meter, multiple media.
Process temperatures from −40°C to +330°C.
4–20mA, Pulse & RS485 for PLCs, data loggers, and monitoring systems.
A bluff body sits across the flow path. As fluid passes, alternating vortices shed from either side — the von Kármán street — at a frequency directly proportional to fluid velocity. A piezoelectric sensor behind the bluff body counts each vortex, converting shedding frequency into volumetric flow.
With no moving parts and stainless steel construction, the AVFM-100 tolerates dirty, corrosive, and high-temperature service with low pressure drop. The same meter body handles liquids, gases, and steam across a 1:6 to 1:30 turndown — one instrument for boiler houses, compressed air, and process lines alike.
The AVFM-100 measures gas, liquid, and vapor/steam within one body. All facts below are from the AVFM-100 datasheet.
With no moving parts in the flow path and a process envelope to +330°C, vortex shedding suits saturated and superheated steam in boiler houses and distribution headers. Specify the temperature + pressure compensation option to read mass flow directly instead of uncompensated volume.
The same body measures gas across a 1:6–1:30 turndown, making the AVFM-100 practical for compressed-air mains, blower lines, and process-gas measurement where mechanical meters wear out. Piezoelectric sensing has no bearings or rotors to maintain.
The complete technical envelope for the AVFM-100 platform. Material and option combinations are configured per application — request a quote with your process details for a tailored configuration.
| Principle | Vortex shedding (piezoelectric sensing) |
| Accuracy | ±1% – ±1.5% of reading |
| Turndown ratio | 1:6 – 1:30 |
| Vibration acceleration | Piezoelectric type, 0.2g |
| Line size | DN25 to DN200 (1" to 8") |
| Medium | Gas, liquid, vapor/steam |
| Process temperature | −40°C to +330°C |
| Ambient temperature | −20°C to +55°C |
| Nominal pressure | 16 kg/cm² (standard) · 40 kg/cm² (optional) |
| Body material | SS304 / SS316L |
| Connection | Flanged |
| Output signals | 4–20mA, RS485, Pulse · HART (optional) |
| Compensation | Without (volumetric flow) · With temperature + pressure compensation (mass flow) |
| Power supply | 24V DC (standard) · 230V AC (optional) |
| Protection class | IP65 |
| Approvals | CE, ISO 9001 |
Integral flanged meter with IP65 transmitter head — one configuration covers liquids, gases, and steam. Contact our engineers for special process requirements.
Gate-free PDFs. No forms, no email gates.
Send us your process details — flow rate, pipe size, media — and our engineers will recommend the right model and configuration.
