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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oduct Specificationsoduct Specifications
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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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1
FeaturFeatur
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eaded eaded
JacJac
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Thr
eaded
ThrThr
eaded eaded
• Tubes sealed on compression gasket
Jac
JacJac
k Scr
k Scrk Scr
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Metering Metering
Metering
Metering Metering
• Heavy-wall, precision bore
• Borosilicate glass
• Removeable without
TT
ube ube
AssembliesAssemblies
T
ube
Assemblies
TT
ube ube
AssembliesAssemblies
disconnnecting instrument
TM TM
TM
TM TM
InIn
terter
cc
EZEZ
-CHANGE-CHANGE
EZ
-CHANGE
EZEZ
-CHANGE-CHANGE
TT
ubes ubes
Assemblies with DirAssemblies with Dir
T
ubes
Assemblies with Dir
TT
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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
In
ter
InIn
terter
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hangeable
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hangeablehangeable
ectect
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ectect
TT
T
TT
ubeube
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ubeube
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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