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MT3750 Series Metal Tube Variable Area Flow Meters

Accurate low-flow measurement. Long-lasting performance in harsh environments.
Models 3750C

Need reliable, durable flow measurement in high-pressure, high-temperature or hazardous process settings? The MT3750 metal tube variable area flow meter from Brooks Instrument is your hard-working answer.

Constructed from high-strength steel, the MT3750 Series VA flow meter features a compact design and multiple threaded and flange connection options to make it easier to install and integrate into existing plants, as well as a cost-effective replacement for glass tube flow meters. Certified explosion proof, it also offers optional transmitters or inductive alarms for more advanced flow measurement and process data capture operations.

Questions?

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Call: 1-888-554-3569

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Features

  • Low flow ranges: Up to 100 I/h or 26 gph
  • High pressure and temperature rating
  • Compact size
  • Multiple threaded or flanged connections
  • Large, easy-to-read indicator
  • No external power required
  • Optional accessories include needle valve, flow controllers and alarms
  • Available with 4-20 mA flow signal transmitter, and/or reed switch alarm signals or inductive alarms for high/low-flow conditions

Benefits

  • Engineered for repeatable accuracy in low-flow rate applications with high-pressure or hazardous fluids
  • Stainless steel construction and compact size enables easier installation into tight spaces, hazardous environments or remote areas
  • Compatible with a wide range of liquids and gases
  • Multiple connection types enable use in multiple location in one plant or process
  • Optional alarms, transmitters and limit switch controllers provide added levels of measurement and control
  • Great replacement for glass tube flow meters (same lay length as Sho-Rate Series 1350)

Applications

  • Basic liquid or gas flow measurement
  • Rotating equipment flow measurement
  • Process analyzers
  • High-pressure flow on offshore oil platforms
  • Burner control
  • Gas chromatography
  • Chemical injection
  • Purge liquid or gas metering
Product Type

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

Performance
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

Pressure Drop
See Capacities & Pressure Drop Tables in Data Sheet
Accuracy

±5% Full Scale  /  Class 4 VDI /  VDE

±3% Full Scale  / Class 2.5 VDI  /  VDE

Repeatability

Less than 1% Full Scale

Mechanical
Metering Tube Material

316L Stainless Steel

Monel K-500

 

Scales

Single or Dual Detachable Aluminum Plate

Silver increments with black background

Scale Length
52mm
Scale Graduations
Choice of direct reading units, percentage of maximum flow with factor tag or linear
Float Material

Size 1 to 6:  316L Stainless Steel

Size 0:  Titanium

Housing
Die cast Aluminum (Alloy 380) with Epoxy Paint Coating and glass window
O-Ring Materials
Viton fluoroelastomer, Buna-N, Kalrez fluoroelastomer, PTFE Teflon, Ethylene Propylene
Connection Materials

316L Stainless Steel

Monel K-500

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

Optional Equipment
Ratings
Max Pressure

Refer to Maximum Pressure Ratings Table in Data Sheet

1500 PSIG  /  100 bar

4000 PSIG  /  276 bar

PED Categories

All sizes meet PED Category SEP

Ambient Temperature Range
-58 to 150°F  /  -50 to 65°C
Max Temperature Range

Meter

-58 to 400°F
-50 to 204°C

Alarm Temperature Range
Reed Switch: -20 to 250°F  /  -29 to 121°C

Inductive Switch: -20 to 158°F  /  -29 to 70°C

Transmitter Temperature Range

-20 to 180°F  / -29 to 82°C

Diagnostics & Display
Transmitter
4 - 20 mA
Alarms

Reed Switch - All Sizes

Inductive Switch - All Sizes

Electrical
Analog Communication

Transmitter

4-20 mA

Digital Communication
Compliance
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

3750C
Fluid Type

Clean Liquids

Gas

Steam

Flow Range (Full Scale Capacity)

Air

110 scfh / 3.1 m3n/hr 

Water

26 gph / 100 l/h

Accuracy

±5% FS / Class 4 VDI / VDE

±3% FS / Class 2.5 VDI / VDE

Max Pressure

1500 PSIG  /  100 bar

4000 PSIG  /  276 bar

Temperature Range

Meter

-58 to 400°F  /  -50 to 204°C

Alarm Option

Reed Switch: -20 to 250°F  /  -29 to 121°C

Inductive Switch: -20 to 158°F  /  -29 to 70°C

Transmitter Option

-20 to 180°F  / -29 to 82°C

Wetted Materials 316 Stainless Steel
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

Analog Communication

Transmitter

4-20 mA Output

Alarms

Reed Switch - All Sizes

Inductive Switch - All Sizes

Certifications/Approvals

Indicator

IP64

Alarms

IP65, NEMA 4X

Transmitter

IP66/67, NEMA 4X

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

FilenameFile TypeDocuments By Language
Data Sheet pdf English Chinese
Installation & Operation Manual pdf English Russian Romanian Spanish
Quick Start Guide pdf English

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: 3750C - ABCDEF - 1 - A - A - A - 0

Meter Series
 Construction/Seals

 Connection Size & Type

 Valve Configuration
 Electrical Output
 Accy
 Accy Group 2

 3750C

 

 

 

 

 

 

 

 

 

 

 

 

 

 A - Std Design; Viton® O-rings

 B - Std Design; Teflon® O-rings

 C - Std Design; Buna O-rings

 D - Std Design; Kalrez® O-rings

 E - Std Design; EPM O-rings

 F - Std Design; Teflon® in Meter and Kalrez®  in Valve

 G - All Welded/High Pressure; No Elastomer - No Valve Cavity

 

 

 

 

 

 

 1- 1/4" NPT (F) - Integral

 2 - 1/4" Tube Compression - With Adapter

 3 - 6 mm Tube Compression - With Adapter

 

 

 

 

 

 

 

 

 A - No Valve (Standard Fitting w/Plug)

 B - Low Flow Valve on Inlet - Typical for Sizes 0, 1, 2

 C - Medium Flow Valve on Inlet - Typical for Sizes 3 & 4

 D - High Flow Valve on Inlet - Typical for Sizes 5 & 6

 E - No Valve Cavity - All Welded/High Pressure Only

 V - Mounted to 316L SS 8902 Flow Controller with Viton® Diaphragm

 

 

 

 

 
 A - None

 B - Reed Switch Alarm, Meter Mounted

 E - Single Inductive Alarm w/M20 x 1.5 Electrical Connection

 F - Single Inductive Alarm w/ 1/2" NPT (F) Electrical Connection

 G - Double Inductive Alarm w/M20 x 1.5 Electrical Connection

 H - Double Inductive Alarm w/ 1/2" NPT (F) Electrical Connection

 J - Mat Transmitter w/M20 x 1.5 Electrical Connection

 K - Mat Transmitter w/ 1/2" NPT (F) Electrical Connection

 A - None

 

 

 

 

 

 

 

 

 

 

 

 

 

 0 - None