Sho-Rate Series

Sho-Rate™ Series Glass Tube Variable Area Flow Meters

Proven performance for low flow rates. Versatile options to match your needs.

Models 1250A / 1255A / 1350G / 1355G / 1358

For a wide range of chemical, petrochemical, biotechnology, research and analytical applications, Sho-Rate™ Series glass tube variable area flow meters provide industry-leading repeatability and reliability in two versatile lines.

Sho-Rate™ 1350/1355 flow meters deliver up to 3% accuracy and 0.25% repeatability depending on the model. Sho-Rate™ 1250/1255 flow meters offer a durable, cost-effective design to meet OEM requirements for systems requiring metering and analyzer integrators.


  • Flow Ranges:
    • Air: Up to 140 scfh / 63 slpm
    • Water: Up to 34 gph / 2000 cc/min
  • Borosilicate glass tubes are compatible with most gases and fluids
  • Float materials include black glass, 316 stainless steel, sapphire, Carboloy®, tantalum
  • Magnification ensures scales are easy to read

Sho-Rate™ 1350 / 1355 / 1358 features include:

  • Three accuracy levels: 3% (low-flow Model 1355), 5% (low-flow Model 1350) or standard accuracy of 10% (high-flow Model 1358)
  • Repeatability of 0.25% Full Scale (0.5% Full Scale for Model 1358)
  • Scale includes built-in magnifier – scale decals can be applied directly to the tube to support unique flow ranges and units of measure
  • Options include standard or NRS™ integral needle control valves, as well as flow controllers on the inlet or outlet to go beyond measurement

Sho-Rate™ 1250 / 1255 features include:

  • Two accuracy levels: 5% Full Scale (Model 1250), 10% Full Scale (Model 1255)
  • Standard direct-read scales for common units and fluids – 65 mm, 150 mm scale lengths (approximate)
  • Inlet valve and outlet valve with options of cartridge valve, precision control valve or no valve
  • Easy-change design allows quick interchangeability of tube assemblies
  • Rotating lens provides a 180° view with magnification
  • Options offer value-added features to meet project or OEM requirements
  • Borosilicate glass is resistant to thermal shock and corrosive gases and fluids
  • Corrosion-resistant material options for scales, floats, fittings and valves accommodate demanding applications
  • Integral float stops prevent loss of float during tube removal
  • Enhance accuracy with easy-to-read scales with magnification
  • Pharmaceutical production
  • Research
  • Chemical manufacturing
  • Analytical instrumentation
  • Water treatment and distribution systems

Product Type

Glass Tube VA Flow Meter


Ideal for Wide Variety of Gas & Liquid Applications
QuickShip Available


Flow Range (Full Scale Capacity)

0.8 – 5 gpm
0.01 – 34 gph
0.041 – 130 lph

3.4 – 15 scfm
0.12 – 140 scfh
3.2 – 3700 nlph

4-900 ml/min
2-100 CCM
0.1-9 LPM
0.1-130 SCFH


± 3% – 10% FS


0.25% FS


Max Pressure

200 psig

Max Temperature

121oC (250oF)


Materials of Construction

Borosilicate Glass, Brass, Aluminum, 316 Stainless Steel, Clear Polycarbonate,
Milk White Polycarbonate, Teflon®


Aluminum or Stainless Steel

Metering Tube Material

Borosilicate Glass


Single or Dual Decal on Tube

Single Decal on Tube

Scale Length

65mm, 150mm

Scale Graduations

Choice of direct reading units, millimeter or percentage of maximum flow with factor tag.

Window Material

1350, 1355, 1358: Polycarbonate with UV Inhibitor

Float Material

Carboloy®, Glass, Sapphire, Stainless Steel, Tantalum

Float Stops


O-Ring Materials

Viton-A® fluoroelastomers

Valve Options

Cartridge III Valve and NRS™

Valve Materials

Stainless Steel

Flow Controller


End Block Options

Stainless Steel and Brass

Connection Materials

Stainless Steel


International Calibration Certificate (ICC)



Diagnostics & Display

Process Connections

Horizontal female 3/8″ NPT threaded adapters
1/8″ – 1/4″ NPT
1/8″ – 1/4″ Compression
6mm Compression
1/4″ – 3/8″; RC
1/4″ VCR®
1/4″ Hose
Swagelok® Converters

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