MT3809 Metal Tube Variable Area Flow Meters
Proven Performance for Demanding Process Conditions
The MT3809 Series metal tube variable area flow meter delivers reliable gas and liquid flow measurement across an exceptionally wide range of pressures, temperatures and flow rates. Proven in thousands of installations worldwide, it is a practical, economical choice for demanding industrial applications.
Available with mechanical or electronic indication, alarms and digital communications, the MT3809 can be configured to meet a wide range of process and hazardous-area requirements.
Now backed by an industry-leading 24-month warranty for added confidence in every installation.
Features & Benefits
- Wide Operating Range: Measures gas and liquid flow from very low to high flow rates across process temperatures from -198°C to 420°C (-325°F to 788°F) and standard pressures up to 6,000 psi / 1379 bar. Turndown ratio is 10:1, with 1%, 2%, 3%, and 5% accuracy options available.
- Flexible Configuration Options: Choose from multiple materials, process connections, indicator configurations, alarms and control options, with more capabilities through our custom engineered specials program.
- Digital Display & Local Operator Interface: Optional transmitter provides flow indication, totalization and alarms, with parameter adjustments available locally without removing the enclosure cover.
- Material Traceability: NACE and 3.1-level material traceability options are available to meet demanding EPC projects, industrial and sour-service documentation requirements.
- Global Certifications & Approvals: Extensive hazardous-area, functional safety, marine and regional approvals help simplify specification for installations worldwide - ATEX, IECEx, SIL 2, CSA, UL, and more. Explosion Proof (XP) and Intrinsically Safe (IS) options also available.
- Process & Safety System Integration: Available 4–20 mA HART and FOUNDATION Fieldbus communications, plus alarm configurations for integration with plant control and safety systems.
- 24-Month Warranty: Industry-leading warranty coverage provides added confidence in the long-term reliability of your MT3809 investment
Applications
- Oil & gas production and processing
- Wellhead platforms
- Chemical and petrochemical processing
- Refining
- Power generation
- Industrial gas systems
- Flare stack flow measurement
- High-pressure and high-temperature flow measurement
- Hazardous-area installations
| Type of Media | Gas / Liquid |
|---|---|
| Flow Measuring Principle | Variable Area (VA) |
| Flow Range | Water: 440 gpm / 100,000 l/h, Air: 750 scfm / 1200 m3n/hr |
| Accuracy Range | ±2% FS / Class 2.5 VDI / VDE, ±1% FS / Class 1.6 VDI / VDE, ±5% FS / Class 4 VDI / VDE, ±3% FS / Class 2.5 VDI / VDE |
| Repeatability | All options except ELF: 0.25% FS, ELF: 1% FS |
| Operating Temperature | -198°C - 420°C |
| Measure/Control | Measure Only (Meter) |
| Max Flow | 20000 slpm |
| Max Flow | 21237000 sccm |
| Max Flow | 100000 l/hr |
| Max Operating Pressure | 1379 bar |
| Max Temperature | 420 celsius |
| Ingress Protection | IP66, IP67, Nema 4x, IP65 |
| Hazardous Area Approved | Class 1 Div 2, Class 1 Div 1, Zone 2, Zone 1 |
| Accuracy (FS) | ±2% FS, ±1% FS, ±5% FS, ±3% FS |
| Connectivity | Analog (4–20 mA), Analog (0–20 mA), Analog (0–10 V), Analog (0–5 V) |
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Use the following guide (model code information from data sheet) to translate the CAD configurations available below. If you need assistance or can’t find what you’re looking for, please contact Applications Engineering or your local Brooks Instrument representative.
Example: 3809G - A - 07 - A - 1 - A - 0
| Meter Series | Construction | Meter & Connection Sizes | Connection Type | Indicator Configuration | Electronics | Valve/Flow Controller |
| 3809G | A - Flange RF Std | See data sheet | A - NPT-Female w/Viton O-Rings | 1 - Aluminum Housing | A - Indicator only | 0 - None |
| B - Flange RF Oversized | B - NPT-Female w/Teflon O-Rings Low Flow Valve on Inlet - Typical for Sizes 0, 1, 2 | 2 - 316SS Housing | B - Inductive Alarm, 1 Switch | A - Valve on Inlet - Viton Seals | ||
| C - Flange RF 2x Oversized | See data sheet | See data sheet | See data sheet | |||
| D - Threaded Female Std | ||||||
| E - Threaded Female 2500 lbs | ||||||
| F - Threaded Male | ||||||
| See data sheet |