High Pressure Paddlewheel Flow Sensor – FLS F3.20
The FLS F3.20 is a robust paddlewheel flow sensor engineered for operation in high-pressure systems and demanding temperature conditions. It is designed for use with all solid-free liquids, provided they comply with the chemical compatibility of the wetted materials. Premium-grade components, such as a stainless steel body/shaft and a Halar® rotor, ensure excellent mechanical strength and proven reliability.
Requiring minimal maintenance, the F3.20 allows easy servicing through a 4-screw assembly and a durable graphite flat gasket. The sensor is available for seamless integration with FLS monitors or for direct PLC connection.
For installation, a stainless steel weld-on adapter is offered, suitable for pipe sizes ranging from 1 ½” to 8” (DN40 to DN200).
High Pressure Paddlewheel Flow Sensor – FLS F3.20
- Working range up to 110 bar (1600 PSI) and up to 248°F (120 °C)
- Wide operating range (from 0,15 to 8 m/s)
- Just one sensor and one fitting for a wide range of pipe dimensions (from 1 ½” to 8”)
- High linearity and repeatability
- Limited maintenance need and easy execution
- Available special version for direct connection to PLC
Technical Details of High Pressure Paddlewheel Flow Sensor – FLS F3.20
| Specification | Details |
|---|---|
| Pipe Size Range | DN40 to DN200 (0.5 to 8 in) |
| Flow Rate Range | 0.15 to 8 m/s (0.5 to 25 ft/s) |
| Linearity | ± 0.75% of full scale |
| Repeatability | ± 0.5% of full scale |
| Pressure | 110 bar (1600 psi) |
| Temperature | 120 °C (248 °F) |
| Minimum Reynolds Number Required | 4500 |
| Enclosure | IP68 |
| Wetted Materials | Sensor body: 316L SS; Sealing system: graphite flat gasket; Rotor: ECTFE (Halar®); Shaft: 316L SS |
| Measuring surface | Graphite (C150 version) or Platinum (C200 version) |
| Manufactured under | ISO 9001, ISO 14001 |
| Certifications | CE, RoHS Compliant, EAC |
| Specification For F3.20.H | Details for F3.20.H |
| Supply Voltage | 5 to 24 VDC regulated |
| Supply Current | < 30 mA @ 24 VDC |
| Output Signal | Square wave |
| Output Frequency | 45 Hz per m/s nominal (13.7 Hz per ft/s nominal) |
| Output Type | Transistor NPN open collector |
| Output Current | 10 mA max |
| Cable Length | 8 m (26.4 ft) standard, 300 m (990 ft) maximum |
| Specification For F3.20.P | Details For F3.20.P |
| Supply Voltage | 12 to 24 VDC regulated |
| Supply Current | < 30 mA @ 24 VDC |
| Output Signal | Square wave |
| Output Frequency | 45 Hz per m/s nominal (13.7 Hz per ft/s nominal) |
| Output Type | Push-Pull (digital input NPN or PNP) |
| Output Current | 10 mA max |
| Cable Length | 8 m (26.4 ft) standard, 300 m (990 ft) maximum |
| Standards & Approvals | Manufactured under ISO 9001, Manufactured under ISO 14001, CE, RoHS Compliant, EAC |
| Part No. | Version | Power supply | Length | Main Wetted Materials | Enclosure | Flow Rate Range | Weight (gr.) |
|---|---|---|---|---|---|---|---|
| F3.20.H.01 | Hall | 5 - 24 VDC | 107 mm | 316L SS | IP 68 | 0.15 to 8 m/s (0.5 to 25 ft./s) | 600 |
| F3.20.P.01 | Push-Pull | 12 - 24 VDC | 107 mm | 316L SS | IP 68 | 0.15 to 8 m/s (0.5 to 25 ft./s) | 600 |
1 – Electrical cable: 8 m. (26.4 ft) standard
2 – Graphite flat gasket
3 – 316L SS sensor body
4 – ECTFE Halar® Open-cell rotor and
316L SS Shaft

Customization & Processing Options
Customizations Option Available for High Pressure Paddlewheel Flow Sensor – FLS F3.20
At Petron Thermoplast, we offer customized PVDF fittings to meet your specific system requirements.
Customization options include:
- Tailor-made dimensions and wall thicknesses
- Custom-molded and machined PVDF fittings
- Pre-fabricated manifolds and assemblies
- Choice of connection type (butt fusion, socket fusion, or flanged)
- OEM branding or marking options
