2500 Series

2500 Series Acrylic Tube Variable Area Flow Meters

Precision-machined acrylic. Economical liquid or gas measurement.

Models 2510 / 2520 / 2530 / 2540S or V / 2540I

Seeking an affordable solution for non-corrosive and low-pressure applications? Now there’s a clear choice: 2500 Series plastic variable area flow meters.

Constructed from precision-machined acrylic, 2500 Series flow meters use annealed, unibody construction that eliminates the leaks and panel detachment common with non-annealed, molded designs. An easy-to-read scale, rod-guided float and positive-stop valve ensure performance and safety. Choose from several valve, fitting, o-ring and float options to fit your specific project.


  • Direct reading air or water scales available in English or metric scales
  • Measure flow rates from 40 ccm to 4000 lpm air and 4 ccm to 20 gpm water
  • Three accuracy levels to choose from: 2%, 3% or 5% Full Scale
  • Premium, threaded brass panel mounting inserts keep meter from detaching
  • Can be configured with a control valve (or no valve)
  • Fittings and valves available in brass, stainless steel or FNPT PVC pipe connections for in-line or panel mount
  • Removable back plate and hex head for wrench
  • Durable, one-piece, clear acrylic construction
  • Large scales are easy-to-read
  • Valve with positive stop stays in place under pressure
  • Rod guided float for stable measurements
  • Fitting, valve and o-ring options accommodate multiple applications
  • Multiple connection options for easier installation
  • Easy disassembly and assembly for maintenance
Key Applications
  • Air sampling equipment aquaculture
  • Desalinization equipment
  • Gas analyzers
  • Medical systems
  • Photo processing equipment
  • Water treatment and distribution systems
  • Purge

Product Type

Machined Acrylic Flow Meter



2-5% FS

Flow Range (Full Scale Capacity)

4 – 3700 ccm
.2 – 60 gph
.25 – 20 gpm
1 – 75 lpm

100 -1000 ccm
0.04 – 4000 lpm
.1 – 200 scfh
.5 – 100 scfm



QuickShip Available

Max Pressure

100 psig

Max Temperature

65oC (150oF)


Float Material

Black Glass
316 Stainless Steel
Delrin Acetal Resins

Seal Material

Buna-N O-rings w/Brass fittings or PVC fittings;
Viton O-rings w/303 SS fittings

Process Connection Material

303 Stainless Steel;
PVC FNPT Pipe Connections (Std).

Valve Materials

Brass or Stainless Steel
Integral Valve on “V” models
Inline Gate Valve on “S” and “I” models


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