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.

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Sho-Rate™ Series Data Sheet

Features

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
Optional standard or NRS™ integral needle control valves, as well as flow controllers on the inlet or outlet to go beyond measurement
Integrated alarm option with single or double inductive ring sensor/switch with Intrinsically Safe Relay is ideal for hazardous environments

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

Benefits

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
Adjustable alarm guarantees safety and continuous process monitoring

Applications

Pharmaceutical production
Research
Chemical manufacturing
Analytical instrumentation
Water treatment and distribution systems

Product Type

Glass Tube VA Flow Meter

Differentiator

Ideal for Wide Variety of Gas & Liquid Applications

Economical

Optional Integrated single or double alarm

QuickShip Available

Performance

Flow Range (Full Scale Capacity)

Water

0.8 - 5 gpm

0.01 - 34 gph

0.041 - 130 lph

Air

3.4 - 15 scfm

0.12 - 140 scfh

3.2 - 3700 nlph

Nitrogen

4-900 ml/min

2-100 CCM

0.1-9 LPM

0.1-130 SCFH

Accuracy

± 3% - 10% FS

Repeatability

0.25% FS

Ratings

Max Pressure

200 psig

Max Temperature

121^oC (250^oF)

Mechanical

Materials of Construction

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

Housing

Aluminum or Stainless Steel

Metering Tube Material

Borosilicate Glass

Scales

1250/1255

Single or Dual Decal on Tube

1350/1355/1358

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

Teflon

O-Ring Materials

Viton-A® fluoroelastomers

Buna-N

Teflon®

Butyl

EPR

Kalrez®

Valve Options

Cartridge III Valve and NRS™

Valve Materials

Stainless Steel

Flow Controller

Yes

End Block Options

Stainless Steel and Brass

Connection Materials

Stainless Steel

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

Diagnostics & Display

Alarms

Inductive ring sensor/switch

Compliance

Certifications/Approvals

International Calibration Certificate (ICC)

	1250A	1255A	1350G	1355G	1358
Differentiator	Rotating lens allows 180° view with magnification	Rotating lens allows 180° view with magnification	Clear Polycarbonate front shield with built-in magnifier for easy float and scale reading. Interchangeable tubes and floats with direct reading (DR) scales on tube	Clear Polycarbonate front shield with built-in magnifier for easy float and scale reading. Interchangeable tubes and floats with direct reading (DR) scales on tube	Heavy-wall, precision bore borosilicate glass metering tube. Tube removable without disconnecting the instrument.
Flow Range (Full Scale Capacity)	Millimeter Scale Air (ccm) 50 - 65850 ccm* Water (ccm) 21.4 - 2055 ccm* *QuickShip	Millimeter Scale Air (ccm) 50 - 66370 ccm* Water (ccm) 22.2 - 2080 ccm* *QuickShip	Millimeter Scale See data sheet for ranges including QuickShip.	Millimeter Scale See data sheet for ranges including QuickShip.	Millimeter Scale See data sheet for ranges.
Flow Range (Full Scale Capacity)	Direct Read Scale Water .1 -10 lpm .1 - 130 scfh Air .1 - 60 lpm 2 -550 ccm .1 -25 scfh Nitrogen 4-400 ml/min 0.1-1.2 scfh	Direct Read Scale Water .1 - 1.3 lpm 2 -130 ccm Air .05 - 50 lpm 4 - 850 ccm .06 - 6 scfh Nitrogen 2 - 100 ccm 0.1 - 9 lpm .5 - 50 scfh	Direct Read Scale Water .010 - 34 gph .041 - 130 lph Air .12 -140 scfh 3.2 - 3700 nlph	Direct Read Scale Water .59 - 2000 cc/min Air 50 - 1300 scc/m .82 - 63 slpm	Direct Read Scale Water .8 - 5 gpm Air 3.4 - 15 scfm
Accuracy	± 5%	± 3%	± 5%	± 3%	± 10% FS
Materials of Construction	Borosilicate Glass Aluminum 316 Stainless Steel Clear Polycarbonate Teflon	Borosilicate Glass Aluminum 316 Stainless Steel Clear Polycarbonate Teflon	Borosilicate Glass Brass Aluminum 316 Stainless Steel Clear Polycarbonate Milk White Polycarbonate Teflon	Borosilicate Glass Brass Aluminum 316 Stainless Steel Clear Polycarbonate Milk White Polycarbonate Teflon	Borosilicate Glass

Filename	File Type	Documents By Language
Data Sheet - 1250/1255	pdf	English
Data Sheet - 1350G/1355G	pdf	English French German Spanish
Data Sheet - 1358	pdf	English
Installation & Operation Manual - 1250/1255	pdf	English
Installation & Operation Manual - 1350G/1355G	pdf	English Russian
Installation & Operation Manual - 1358	pdf	English
CE EU Declaration of Conformity Certificate	pdf	English Korean Romanian Russian Spanish

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: 1350G - 1 - T - 1 - A

Meter Series	Fitting & Connection	Valve	Connection Orientation	Options
1350G	1 - 316SS 1/4" Compression w/locknut (2 pc design)	T - Cartridge II/III Valve - Low Flow - 316SS	1 - Valve/Controller Location = Inlet, Connection Orientation = Back	A - None

Filename	File Type
1250-V	DXF
1250-V	IGS
1250-V	STEP
1255-V	dxf
1255-V	IGS
1255-V	STEP
1350G-1-A-1-R	DXF
1350G-1-A-1-R	IGS
1350G-1-A-1-R	STEP
1350G-1-T-1-A	DXF
1350G-1-T-1-A	IGS
1350G-1-T-1-A	STEP
1350G-C-T-1-A	DXF
1350G-C-T-1-A	IGS
1350G-C-T-1-A	STEP
1350G-J-A-1-A	DXF
1350G-J-A-1-A	IGS
1350G-J-A-1-A	STEP
1350G-J-V-1-A	DXF
1350G-J-V-1-A	IGS
1350G-J-V-1-A	STEP
1350G-N-U-1-A	IGS
1350G-N-U-1-A	STEP
1355G-1-T-1-A	DXF
1355G-1-T-1-A	IGS
1355G-1-T-1-A	STEP
1355G-1-U-5-A	DXF
1355G-1-U-5-A	IGS
1355G-1-U-5-A	STEP
1355G-F-T-1-C	IGS
1355G-F-T-1-C	STEP
1355G-F-T-1-C	DXF
1355G-J-C-5-A	DXF
1355G-J-C-5-A	IGS
1355G-J-C-5-A	STEP
1355G-J-J-1-A	IGS
1355G-J-J-1-A	DXF
1355G-N-A-1	IGS
1355G-N-A-1	STEP
1358F-2-B-1	DXF
1358F-2-B-1	IGS
1358F-2-B-1	STEP
1358F-2-B-F	DXF
1358F-2-B-F	IGS
1358F-2-B-F	STEP