Brooks Instrument 1250, 1255 Specifications

Sho-RateTM 1250/55 Series

DS-VA-1250-55-Series-eng

July, 2017

Data Sheet

TM

Sho-Rate

Models 1250 & 1255

Variable Area

Low Flow

Ships in 3 days

OverviewOverview

Overview

OverviewOverview

Series 1250/55 are flowmeters for liquids and gases available in 65 or 150mm scale lengths.
These flowmeters can be configured with a standard or precision control valve on the inlet, the
outlet (with limitations) or no valve; fittings can be specified in either aluminum or stainless
steel; valves can be specified in either brass or stainless steel; O-rings and seals can be
provided in Buna-N or Viton® fluoroelastomer.

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• Standard direct read scales on tube for air, N2 & water @ reference conditions

• Additional direct read scales on tube for selected gases @ reference conditions are
available as options

• Standard millimeter scales with flow data @ reference conditions for air, water, O2,

N2, CO2, He & Ar

• Scale length (approximate) 65mm, 150mm

• Rotating lens provides a 180O view with magnification

• Flowmeter options:

No valve
Cartridge valve (inlet and outlet (vacuum or water service only))

Precision control valve (inlet and outlet (vacuum or water service only))

• EZ-CHANGETM design allows quick interchangeability of tube assemblies

• Available with aluminum & 316 SS connections

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Glass Tube Flowmeters

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12501250

1250

PerformancePerformance

Performance

PerformancePerformance

AccuracyAccuracy

Accuracy ±5% full scale at reference conditions* (for listed gases) ± 3% full scale at reference conditions* (for listed gases)

AccuracyAccuracy

RepeatabilityRepeatability

Repeatability 0.25% F.S.

RepeatabilityRepeatability

Pressure/TemperaturePressure/Temperature

Pressure/Temperature 200 psig (33°F - 250°F) / 13.8 bar (1°C-121°C)

Pressure/TemperaturePressure/Temperature

Materials of ConstructionMaterials of Construction

Materials of Construction Borosilicate Glass, Aluminum, 316 Stainless Steel, Clear Polycarbonate, Teflon

Materials of ConstructionMaterials of Construction

End Block OptionsEnd Block Options

End Block Options Stainless Steel and Aluminum

End Block OptionsEnd Block Options

Packing MaterialPacking Material

Packing Material Viton® fluoroelastomers, Buna

Packing MaterialPacking Material

Float MaterialsFloat Materials

Float Materials Glass, Sapphire, Stainless Steel, Carboloy®, Tantalum

Float MaterialsFloat Materials

Connection MaterialsConnection Materials

Connection Materials Stainless Steel and Aluminum

Connection MaterialsConnection Materials

Connection OptionsConnection Options

Connection Options 1/8” NPT (w/locknuts) - Aluminum and Stainless Steel

Connection OptionsConnection Options

DimensionsDimensions

Dimensions See Dimension Drawings

DimensionsDimensions

Valve OptionsValve Options

Valve Options Cartridge Valve and Precision Valve

Valve OptionsValve Options

Valve MaterialsValve Materials

Valve Materials Stainless Steel and Brass

Valve MaterialsValve Materials

*Reference conditions: 70°F (21.1°C) / 14.7 psia (1 BarA)

12501250

1/4” NPT (w/locknuts) - Stainless Steel only

12551255

1255

12551255

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• Tubes sealed on compression gasket

Jac

JacJac

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k Scrk Scr

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Metering Metering

Metering

Metering Metering

• Heavy-wall, precision bore

• Borosilicate glass

• Removeable without

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AssembliesAssemblies

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Assemblies

TT

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AssembliesAssemblies

disconnnecting instrument

TM TM

TM

TM TM

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EZEZ

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EZ

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EZEZ

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Assemblies with DirAssemblies with Dir

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Assemblies with Dir

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Assemblies with DirAssemblies with Dir

Reading (DR) Scales on the Reading (DR) Scales on the

Reading (DR) Scales on the

Reading (DR) Scales on the Reading (DR) Scales on the

• Allows users to change ranges as
the application dictates

• DR Scale on Tube for standard
fluids at reference conditions

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ubeube

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Rotating PRotating P

Rotating P

Rotating PRotating P

• 180° view of float with
magnification

2

olycarbonate Lensolycarbonate Lens

olycarbonate Lens

olycarbonate Lensolycarbonate Lens

Optional Optional

Optional

Optional Optional

• Cartridge III Valves

• Precision valves (For enhanced

VV

alves for Inletalves for Inlet

V

alves for Inlet

VV

alves for Inletalves for Inlet

resolution of flow setting)

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Model 1250

Air

Tube No. Float Float Dia. ml/mim LPM CCM SCFH

D6011
D6023
D6032
D6042
D6051
D6053
D6073
D6092
D6093
D6104

G 1/8" 2 -50 Standard

ST 1/8" 10 - 300 Ranges

S 1/8' 25 - 550 0.1 - 1.2
S 1/8' 0.1 - 1 120 - 1,200
G 3/16" 0.1 - 2.5 0.25 - 5.5

ST 3/16" 0.3 - 5
ST 1/4" 0.2 - 11.4 2.5 - 25

S 1/4" 1 - 20

ST 1/4" 1 - 30 4 - 60

C 1/4" 2 - 60

TT

able: Model 1250able: Model 1250

T

able: Model 1250

TT

able: Model 1250able: Model 1250

D6013
D6021
D6083

D6052 S 3/16" 0 - 5000

Tube No. Float Float Dia. ml/mim LPM CCM SCFH

D6021 G 1/8" 4 -100 Standard
D6032 S 1/8" 20 -560 0.1 - 1.2 Ranges
D6051 G 3/16" 0.5 - 5
D6053 ST 3/16" 0.4 - 10
D6063 ST 3/16" 0.5 - 16
D6081 G 1/4" 2 - 20
D6104 C 1/4" 13 - 130

D6013 ST 1/8" 15 - 150 Extended
D6053 ST 3/16" 500 - 5,000 Ranges 1

D6081 G 1/4" 1 - 10

Tube No. Float Float Dia. ml/mim LPH CCM GPM GPH

D6053 ST 3/16" 4 - 140 4 - 140 Standard
D6073 ST 1/4" 0.2 - 5 Ranges
D6093 ST 1/4" 0.5 - 14
D6101 G 1/4" 25 - 575
D6105 T 1/4" 50 - 2000

ST 1/8" 0 - 150 Extended

G 1/8" 5 - 100 Ranges 1

ST 1/4" 4 - 40

Extended
Ranges 2

Model 1250

Nitrogen

Extended
Ranges 2

Model 1250

Water

D6105 T 1/4" .02 - 0.5

Model 1250

Oxygen

Tube No. Float Float Dia. ml/mim LPM CCM SCFH

D6052 S 3/16" 0.3 - 3 Extended

Hydrogen

D6011 G 1/8" 5 -115
D6052 S 3/16" 1 - 10

Argon

D6051 G 3/16" 0 - 2

Carbon Dioxide

D6042 S 1/8" 100 - 1,000

Float Material KFloat Material K

Float Material K

Float Material KFloat Material K

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Extended
Ranges 2

Ranges 2

(G) Black Glass
(S) Sapphire
(ST) Stainless Steel
(C) Carboloy
(T) Tantalum

3

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Model 1255

Air

Tube No. Float Float Dia. ml/mim LPM CCM SCFH

D1022 S 1/8" 4- 160 Standard
D1032 ST 1/8' .05 - 1.15 Ranges
D1033 ST 1/8' 30 -850
D1043 ST 1/8" 0.06 -1.7
D1052 S 3/16" 0.05 -3 0.1 - 6
D1082 S 1/4" 1 -30

D1084 C 1/4" 1 - 50

D1021 G 1/8" 2 -100 2 -100 Extended
D1032 S 1/8" 20 -550 Ranges 1
D1053 ST 3/16" 100 -4,500
D1063 ST 3/16" 0.1 - 6.6
D1085 T 1/4" 2,000 -66,000

Model 1255

Nitrogen

Tube No. Float Float Dia. ml/mim LPM CCM SCFH

D1021 G 1/8" 2 -100 Standard
D1041 G 1/8" 20-900 Ranges
D1071 G 1/4" 0.1 - 9 0.5 - 20
D1081 G 1/4"

TT

able: Model 1255able: Model 1255

T

able: Model 1255

TT

able: Model 1255able: Model 1255

Model 1255

Water

Tube No. Float Float Dia. ml/mim LPH CCM GPM

D1053 ST 3/16" 2 -130 Standard
D1083 ST 1/4" 0.1 -1.3 Ranges

Model 1255

Oxygen

Tube No. Float Float Dia. ml/mim LPM CCM SCFH

D1054 C 3/16" 0.2 - 5 Extended
D1072 S 1/4" 2 -24

Float Material KFloat Material K

Float Material K

Float Material KFloat Material K
(G) Black Glass
(S) Sapphire
(ST) Stainless Steel
(C) Carboloy
(T) Tantalum

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Ranges 2

4

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TT

ables: Models 1250 & 1255 - Millimeterables: Models 1250 & 1255 - Millimeter

T

ables: Models 1250 & 1255 - Millimeter

TT

ables: Models 1250 & 1255 - Millimeterables: Models 1250 & 1255 - Millimeter

Model 1250

Millimeter

Tube No. Float Float Dia. Air (CCM) Water (CCM)

R6011**
R6012**
R6013**
R6014**
R6021**
R6022**
R6023**
R6024**
R6031**
R6032**
R6033**
R6034**
R6041**
R6042**
R6043**
R6044**
R6051**
R6052**
R6053**
R6054**
R6061**
R6062**
R6063**
R6064**
R6071**
R6072**
R6073**
R6081**
R6082**
R6083**
R6091**
R6092**
R6093**
R6101**
R6102**
R6103**
R6105**

G 1/8" 50 Standard
S 1/8" 75 Ranges

ST 1/8' 153

C 1/8' 278
G 1/8" 103

S 1/8" 160

ST 1/8" 298

C 1/8" 498
G 1/8" 400
S 1/8" 550

ST 1/8" 855 21.4

C 1/8" 1275 35.4
G 1/8" 900 18.2
S 1/8" 1200 29.6

ST 1/8" 1800 50.1

C 1/8" 2620 76.1
G 3/16" 2580 55
S 3/16" 3350 85

ST 3/16" 5030 140

C 3/16" 7270 215
G 3/16" 3840 90
S 3/16" 5080 130

ST 3/16" 7510 220

C 3/16" 10700 325
G 1/4" 6000 130
S 1/4" 7790 200

ST 1/4" 11450 335

G 1/4" 10100 235
S 1/4" 12980 350

ST 1/4" 18960 560

G 1/4" 15750 375
S 1/4" 20170 545

ST 1/4" 29400 880

G 1/4" 23640 570
S 1/4" 30090 825

ST 1/4" 43340 1330

T 1/4" 65850 2055

** Select meters ship in 3 days.

Max order quantity = 15 meters.
Consult factory on orders of more than 15 meters.

Model 1255

Millimeter

Tube No. Float Float Dia. Air (CCM) Water (CCM)

R1011**
R1012**
R1013**
R1014**
R1021**
R1022**
R1023**
R1024**
R1031**
R1032**
R1033**
R1034**
R1041**
R1042**
R1043**
R1044**
R1051**
R1052**
R1053**
R1054**
R1061**
R1062**
R1063**
R1064**
R1071**
R1072**
R1073**
R1081**
R1082**
R1083**
R1085**

G 1/8" 50 Standard
S 1/8" 80 Ranges

ST 1/8' 152

C 1/8' 275
G 1/8" 103
S 1/8" 160

ST 1/8" 293

C 1/8" 497
G 1/8" 400
S 1/8" 555

ST 1/8" 870 22.2

C 1/8" 1300 36.2
G 1/8" 855 18
S 1/8" 1135 27.6

ST 1/8" 1710 47.5

C 1/8" 2465 73.2
G 3/16" 2290 50
S 3/16" 3980 75

ST 3/16" 4480 125

C 3/16" 6475 190
G 3/16" 3425 75
S 3/16" 4465 115

ST 3/16" 6600 190

C 3/16" 9470 285
G 1/4" 9180 215
S 1/4" 11990 315

ST 1/4" 17810 515

G 1/4" 23740 565
S 1/4" 30270 830

ST 1/4" 44050 1335

T 1/4" 66370 2080

** Select meters ship in 3 days.

Max order quantity = 15 meters.
Consult factory on orders of more than 15 meters.

Float Material KFloat Material K

Float Material K

Float Material KFloat Material K

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(G) Black Glass
(S) Sapphire
(ST) Stainless Steel
(C) Carboloy
(T) Tantalum

5

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Pr

oduct Dimensions - Models 1250 and 1255

PrPr

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Model 1250 Sho-RateModel 1250 Sho-Rate

Model 1250 Sho-Rate

Model 1250 Sho-RateModel 1250 Sho-Rate

Model 1255 Sho-RateModel 1255 Sho-Rate

Model 1255 Sho-Rate

Model 1255 Sho-RateModel 1255 Sho-Rate

6

OrOr

dering Indering In

Or

dering In

OrOr

dering Indering In

formation - Referformation - Refer

formation - Refer

formation - Referformation - Refer

1. Model

2. Size & connections

3. Quantity required

4. Fluid

5. Materials of construction

a. End fittings (Aluminum or stainess steel)
b. Elastomers (Viton or Buna)

6. Fluid or mm scale with table

7. Optional equipment

a. Valve type or none

Model CodeModel Code

Model Code

Model CodeModel Code

ence Model Code ence Model Code

ence Model Code

ence Model Code ence Model Code

TT

ableable

T

able

TT

ableable

Code DescriptionCode Description

Code Description

Code DescriptionCode Description

I.I.

I. Base Model Number

I.I.

II.II.

II. Tube Number

II.II.

III.III.

III. Gas or Liquid

III.III.

IV.IV.

IV. Unit of Measure

IV.IV.

V.V.

V. End Blocks Material (Wetted)

V.V.

VI.VI.

VI. Valve Designation

VI.VI.

VII.VII.

VII. O-ring Material Used in Valve

VII.VII.

* Valve material is determined by End Blocks Material selection (Brass valve with Aluminum End Blocks and Stainless Steel valve with Stainles Steel End Blocks).

** Select meters ship in 3 days.

Max order quantity = 15 meters.
Consult factory on orders of more than 15 meters.

Code OptionCode Option

Code Option

Code OptionCode Option

1250A1250A

1250A 65 mm Tube Flowmeter

1250A1250A
1255A1255A

1255A 150 mm Tube Flowmeter

1255A1255A

XXXXXXXXXX

XXXXX See Capacity Tables for appropriate Tube Number

XXXXXXXXXX

AA

A Air

AA

M**M**

M** Millimeter with standard data tables

M**M**

NN

N Nitrogen

NN

WW

W Water

WW

MM

M ml/min

MM

LL

L LPM

LL

CC

C CCM

CC

PP

P GPM

PP

R**R**

R** Millimeter

R**R**

FF

F SCFH

FF

GG

G GPH

GG

A**A**

A** 1/8” FNPT Aluminum

A**A**
S**S**

S** 1/8” FNPT Stainless Steel

S**S**

Q**Q**

Q** 1/4” FNPT Stainless Steel

Q**Q**

N**N**

N** No Valve

N**N**

V*/**V*/**

V*/** Standard Inlet Valve

V*/**V*/**

P*P*

P* Precision Inlet Valve, maximum flow of 21.3 slpm air/1,255 sccm water

P*P*

O*/**O*/**

O*/** Outlet Valve (Vacuum or water service only)

O*/**O*/**

R*R*

R* Precision Outlet Valve (Vacuum or water service only)

R*R*

B**B**

B** Buna - Aluminum only

B**B**
V**V**

V** Viton - Stainless Steel only

V**V**

Option DescriptionOption Description

Option Description

Option DescriptionOption Description

Additional OptionsAdditional Options

Additional Options

Additional OptionsAdditional Options

• Certificate of Conformance

• ICC

• Paper Tag

• Stainless Steel Tag

• Degrease for O2 Cleaning

• Material Certificaton 2.2

• No Brooks logo

Sample Standard Model Code

I II III IV V VI VII

1250A D6011 A C S V V

7

BrBr

ooks Service and Supportooks Service and Support

Br

ooks Service and Support

BrBr

ooks Service and Supportooks Service and Support

Brooks is committed to assuring all of our customers receive the ideal flow solution for their application, along with outstanding service and
support to back it up. We operate first class repair facilities located around the world to provide rapid response and support. Each location
utilizes primary standard calibration equipment to ensure accuracy and reliability for repairs and recalibration and is certified by our local
Weights and Measures Authorities and traceable to the relevant International Standards.

Visit www.BrooksInstrument.com to locate the service location nearest to you.

STST

ARAR

TT

-UP SERVICE -UP SERVICE

ST

AR

T

-UP SERVICE

STST

ARAR

TT

-UP SERVICE -UP SERVICE

Brooks Instrument can provide start-up service prior to operation when required. For some process applications, where ISO-9001 Quality
Certification is important, it is mandatory to verify and/or (re)calibrate the products periodically. In many cases this service can be provided under
in-situ conditions, and the results will be traceable to the relevant international quality standards.

AND IN-SITU CALIBRAAND IN-SITU CALIBRA

AND IN-SITU CALIBRA

AND IN-SITU CALIBRAAND IN-SITU CALIBRA

TIONTION

TION

TIONTION

SEMINARS SEMINARS

SEMINARS

SEMINARS SEMINARS

Brooks Instrument can provide seminars and dedicated training to engineers, end users, and maintenance persons.

Please contact your nearest sales representative for more details.

Due to Brooks Instrument's commitment to continuous improvement of our products, all specifications are subject to change without notice.

TRADEMARKS

Brooks, Sho-Rate, EZ-CHANGE ......................... Brooks Instrument, LLC

All other trademarks are the property of their respective owners.

AND AND

AND

AND AND

TRAININGTRAINING

TRAINING

TRAININGTRAINING

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