Skip links

HOLIDAY HOURS: All Brooks Instrument facilities in the USA will be closed December 23, 26, 30 and January 2. For holiday hours of our facilities across the globe, please contact the specific location directly.

Metal Tube Variable Area Flow Meters

Durable and accurate flow measurement for high-pressure and extreme temperature applications.

Armored to deliver repeatable, reliable flow measurement in demanding high-pressure, high-temperature applications, metal tube variable area flow meters from Brooks Instrument set the global standard for rugged durability and sustained accuracy.

Globally approved for use in hazardous environments, Brooks offers a range of metal tube flow meters that include corrosion-resistant options for metering aggressive fluids and multiple connection options to make it easier to interface our meter into existing industrial systems. Engineered for long-lasting performance, all Brooks VA metal tube flow meters deliver excellent meter repeatability to help accurately measure and precisely control complex industrial processes.

Key Applications

  • Basic liquid or gas flow measurement
  • Rotating equipment flow measurement
  • High-pressure flow on offshore oil platforms
  • Chemical injection
  • Purge liquid or gas metering

Select the metal tube variable area flow meter that best meets your project requirements.

PRODUCTS

MT3750 Series
MT3750 Series
MT3809 Series
MT3809 Series
Product Type

Metal Tube Variable Area Flow Meter

Applications:  Clean liquids, gases and steam

Metal Tube Variable Area Flow Meter

Applications:  Clean liquids, gases and steam

Differentiator

Broad, Low Flow Ranges

Perfect for high pressure and/or high temperature applications

Compact design

Good upgrade from glass tube meters

Repeatable flow measurement even at low process temperatures down to -198°C / -325°F and high process temperatures up to 420°C / 788°F

Designed for high process pressures 1379 bar(a) / 20,000 psig

Customers can rely on a proven flow measurement technology that works when electrical power is not availableand at the same time communicate to controlsystems over analog- or digital interfaces

Optional local operator interface with LCDscreen for easy operator control and alarm functions that meet SIL 2requirements

A selection of corrosion resistant wettedmaterials and indicator housings to fit your demanding applications

Product is designed to meet ASME B31.3 which isa requirement requested at the world’s major industrial facilities. Productdocumentation, material traceability and project planning perfectly blends withthe needs of Engineering Procurement Contractors (EPC) system integrators

Flow Range (Full Scale Capacity)

Refer to Capacity Tables in Data Sheet

Water

26 gpm / 100 l/h

Air

110 scfh / 3.1 m3n/hr

Refer to Capacity Tables in Data Sheet

Water

440 gpm / 100,000 l/h

Air

750 scfm / 1200 m3n/hr

Accuracy

±5% Full Scale  /  Class 4 VDI /  VDE

±3% Full Scale  / Class 2.5 VDI  /  VDE

±2% Full Scale  /  Class 2.5 VDI /  VDE

±1% Full Scale  / Class 1.6 VDI  /  VDE

±5% Full Scale  /  Class 4 VDI /  VDE

±3% Full Scale  / Class 2.5 VDI  /  VDE

Max Temperature Range

Meter

-58 to 400°F
-50 to 204°C

Meter

-325 to 788°F
-198 to 420°C

Max Pressure

Refer to Maximum Pressure Ratings Table in Data Sheet

1500 PSIG  /  100 bar

4000 PSIG  /  276 bar

Refer to Pressure/Temperature Tables in Data Sheet

O-Ring Materials Viton fluoroelastomer, Buna-N, Kalrez fluoroelastomer, PTFE Teflon, Ethylene Propylene

Flange option or Male NPT:  No O-rings

Female threaded options:  Viton fluoroelastomer, Kalrez fluoroelastomer, PTFE Teflon

Process Connections

316 Stainless Steel:  1/4", 1/2", 3/4" NPT,1/4" Rc (BSP) Female connections

316 Stainless Steel:  1/4:, 6mm Tube Compression

Monel K-500:  1/4" NPT Female

All materials:  NPT, Rc (BSP) Female

All materials:  150#, 300#, 600# Flanges per ASME B16.5

All materials:  DIN PN40 Flanges

All materials:  JIS B2220 DIN 10K, 20K Flanges

Analog Communication

Transmitter

4-20 mA

Transmitter

4-20 mA

Digital Communication HART 7
Alarms

Reed Switch - All Sizes

Inductive Switch - All Sizes

Inductive Switch - All Sizes

Certifications/Approvals

International Calibration Certificate (ICC)

Material certification

Liquid Dye Penetrant

Positive Material Identification

NACE MR 01-75 & MR 0103

Pressure Test certificate

Oxygen Cleaning certificate

Certificate of Conformance

International agency approvals for alarm and transmitter

SIL 2 for alarm option

International Calibration Certificate (ICC)

Material certifications

Liquid Dye Penetrant

Positive Material Identification

NACE MR 01-75 & MR 0103

Pressure Test certificate

Oxygen Cleaning certificate

Certificate of Conformance