Beyond Measure

Sho-Rate™ Models
1350G & 1355G
Glass Tube Variable Area Flowmeters (Rotameters)
for Low Flow Rates

Sho-Rate™ Series glass tube variable area flowmeters have

been the industry standard for decades. Ideal for a variety
of low flow gas and liquid applications, these flowmeters
are particularly suited for purge applications. The base
configuration uses a borosilicate glass tube installed in
an aluminum frame with 316SS end blocks, adaptors, and
valve. Additional material options, valve options, and
flow controllers are available to provide the appropriate
configuration for a wide variety of applications.

Features Benefits
Standard Direct Read Scales on Tube and Millimeter Tube and float options to meet exact customer
Scales with Flow Data for All Fluids and Fluid process conditions
Conditions
Multiple Connection Fittings, Adapters, and Approval Suits a wide range of world area applications and
Certifications requirements
Clear Polycarbonate Face Shield with Built-In Easier float and scale reading
Magnifier
Heavy Wall, Precision Bore Borosilicate Glass Resistant to thermal shock and corrosive gasses and
Metering Tube fluids
Integrated Alarm Option with Single or Double Ideal for hazardous environments and applications
Inductive Ring Sensor/Switch with Intrinsically Safe where process conditions are critical
Relay
Interchangeable Tubes and Floats with Integral Float Easy in-situ maintenance. Prevents loss of float during
Stops tube removal
Compatible with Cartridge and Precision Control Meets a wider range of customer requirements where
Valve (Inlet & Outlet) and Integral Flow Controller flow control is necessary
(Upstream & Downstream)

BrooksInstrument.com
 Product Specifications

1350G 1355G
Performance
Accuracy ±5% at reference conditions* ±3% at reference conditions*
Repeatability 0.25% F.S.
Pressure / Temperature 200 psig (33°F - 250°F) / 13.8 bar (1°C - 121°C)
Borosilicate glass, Brass, Aluminum, 316 Stainless Steel, Clear Polycarbonate,
Materials of Construction
Milk White Polycarbonate, Teflon®
End Block Options Stainless Steel and Brass
Elastomer Seals Viton® fluoroelastomers, Teflon®, Buna, Kalrez® per fluoroelastomers
Float Materials Glass, Sapphire, Stainless Steel, Carboloy®, Tantalum
Connection Materials Stainless Steel
1/8” NPT (w/wo locknuts)
1/4” NPT (w/wo locknuts)
1/8” Compression (w/wo locknuts)
1/4” Compression (w/wo locknuts)
Connection Options 6 mm Compression (w/wo locknuts)
1/4” RC (w/wo locknuts)
3/8” RC (w/wo locknuts)
1/4” VCR®
1/4” ID Hose
Dimensions See Dimension Drawings
1 Inductive Ring Sensor/Switch
Alarm Availability 2 Inductive Ring Sensor(s)/Switch(es)
Inductive Ring Sensor(s)/Switch(es) with Relay Options
Valve Options Cartridge III Valve and NRS™
Valve Materials Stainless Steel
Flow Controller Yes
International Calibration Certificate (ICC)
CRN
Pressure Equipment Directive (97/23/EC)
Certifications
RoHS (II)
REACH
Materials (2.1)

* Reference conditions apply to air or water at 14.7 psia and 70 Degrees F/1.01 Bar and 21.1 Degrees C.

2
 Product Specifications
Capacities - Rib Guide Tubes, Spherical Floats for use with 1350G Series Only
Full Scale - Water Full Scale - Air

Meter Size Tube No. Float Material GPH LPH SCFH1 NLPH2
Glass 0.010 0.041 0.12 3.2
Sapphire 0.021 0.079 0.19 5.0
R-2-65-A G Stainless Steel 0.049 0.18 0.37 9.8
Carboloy 0.10 0.36 0.65 17
Tantalum 0.10 0.40 0.71 18
Glass 0.014 0.06 0.16 4.4
Sapphire 0.028 0.10 0.25 6.7
R-2-65-B G Stainless Steel 0.07 0.25 0.48 12
Carboloy 0.12 0.48 0.80 21
Tantalum 0.14 0.53 0.87 22
2
Glass 0.12 0.47 0.99 26
Sapphire 0.22 0.83 1.3 35
R-2-65-C G Stainless Steel 0.41 1.5 2.1 55
Carboloy 0.65 2.4 3.1 81
Tantalum 0.70 2.6 3.3 87
Glass 0.68 2.5 3.9 100
Sapphire 0.99 3.7 5.1 130
R-2-65-D G Stainless Steel 1.6 6.3 7.9 200
Carboloy 2.5 9.5 11 290
Tantalum 2.7 10.0 12 310
Glass 2.2 8.5 13 340
Sapphire 3.3 12 17 440
R-6-65-A G Stainless Steel 5.6 21 25 660
Carboloy 8.3 31 36 940
Tantalum 8.8 33 38 1000
6
Glass 8.7 33 46 1200
Sapphire 12 47 59 1500
R-6-65-B G Stainless Steel 20 76 86 2200
Carboloy 29 100 110 3100
Tantalum 30 110 120 3300
1
Air flow rates in standard units are at 70°F & 14.7 PSIA. Reference conditions 70°F latm.
2
Air flow rates in normal units are at 20°C & 1.013 bar. Reference conditions 0°C latm.

3
 Product Specifications
Capacities - Rib Guide Tubes, Spherical Floats for use with 1355G Series Only
Full Scale Flow

Meter Size Tube No. Float Material Water (CC/Min) Air1

Glass 0.59 50 SCC/M
Sapphire 1.1 79 SCC/M
R-2-15-AAAA G Stainless Steel 2.6 150 SCC/M
Carboloy 5.2 280 SCC/M
Tantalum 5.8 310 SCC/M
Glass 5.5 370 SCC/M
Sapphire 10 520 SCC/M
R-2-15-D G Stainless Steel 20 830 SCC/M
Carboloy 34 1200 SCC/M
Tantalum 36 1300 SCC/M
Glass 17 0.82 SLPM
Sapphire 26 1.0 SLPM
2 R-2-15-A G Stainless Steel 46 1.6 SLPM
Carboloy 70 2.4 SLPM
Tantalum 75 2.5 SLPM
Glass 53 2.3 SLPM
Sapphire 80 3.0 SLPM
R-2-15-B G Stainless Steel 130 4.6 SLPM
Carboloy 200 6.7 SLPM
Tantalum 210 7.1 SLPM
Glass 90 4.0 SLPM
Sapphire 130 5.2 SLPM
R-2-15-C G Stainless Steel 220 7.9 SLPM
Carboloy 340 11 SLPM
Tantalum 360 11 SLPM
Glass 210 9.5 SLPM
Sapphire 320 12 SLPM
R-6-15-A G Stainless Steel 540 18 SLPM
Carboloy 790 25 SLPM
Tantalum 840 26 SLPM
6
Glass 560 23 SLPM
Sapphire 820 29 SLPM
R-6-15-B G Stainless Steel 1300 43 SLPM
Carboloy 1900 60 SLPM
Tantalum 2000 63 SLPM
1
Air flow rates in standard units are at 70°F & 14.7 PSIA. Reference conditions 70°F latm.

4
 Product Dimensions

Model 1350G

Dimension "A" Connection Adapter

1/8" NPT 0.625 [15.9]

1/4" NPT 0.625 [15.9]

1/8" Compression 1.59 [40.3]

1/4" Compression 1.78 [45.1]

1/4" ID Hose 0.72 [18.3]

1/4" RC 0.895 [22.7]

3/8" RC 0.895 [22.7]

Model 1355G

Dimension "A" Connection Adapter

1/8" NPT 0.625 [15.9]

1/4" NPT 0.625 [15.9]

1/8" Compression 1.59 [40.3]

1/4" Compression 1.78 [45.1]

1/4" ID Hose 0.72 [18.3]

1/4" RC 0.895 [22.7]

3/8" RC 0.895 [22.7]

5
 Product Dimensions

Model 1350G/1355G with Model 8800 Flow Controller on Inlet

Model Scale Dim C Dim C

No. Length Dim A Dim B (Open) (Closed) Dim D

mm Inch mm Inch mm Inch mm Inch mm Inch mm

1350 65 7.31 185.7 4.34 110.3 2.79 70.8 2.65 67.2 6.38 162.0

1355 150 11.72 297.7 8.75 222.2 2.79 70.8 2.65 67.2 10.78 273.8

Inlet Connection Outlet Connection

Conn. E F
Size Inch mm Inch mm

1/8 NPT 1.85 46.9 1.91 48.4

1/4 NPT 1.13 28.6 1.91 48.4

1/8
2.19 55.6 2.87 72.8
Comp.

1/4
2.28 57.8 3.06 77.6
Comp.

1/4 ID
2.44 61.9 2.00 50.8
Hose

1/4 VCR
N/A N/A 2.19 55.6
(M)

1/4 RC 2.10 53.3 2.18 55.3

3/8 RC 2.60 66.1 2.18 55.3

Model 1350G/1355G with Model 8900 Flow Controller on Outlet

Model Scale Dim C Dim C

No. Length Dim A Dim B (Open) (Closed) Dim D

mm Inch mm Inch mm Inch mm Inch mm Inch mm

1350 65 7.31 185.7 4.34 110.3 2.79 70.8 2.65 67.2 6.38 162.0

1355 150 11.72 297.7 8.75 222.2 2.79 70.8 2.65 67.2 10.78 273.8

Inlet Connection Outlet Connection

Conn. E F
Size Inch mm Inch mm

1/8 NPT 1.91 48.4 1.85 46.9

1/4 NPT 1.91 48.4 1.13 28.6

1/8
2.87 72.8 2.19 55.6
Comp.

1/4
3.06 77.6 2.28 57.8
Comp.

1/4 ID
2.00 50.8 2.44 61.9
Hose

1/4 VCR
2.19 55.6 N/A N/A
(M)

1/4 RC 2.18 55.3 2.10 53.3

3/8 RC 2.18 55.3 2.60 66.1

6
 Product Approvals

Meter Options

Declaration Mark Inductive Alarm Standards/Directives/Marking Status/Certificate

EU Declaration of  EMC Directive (2014/30/EU) Declaration

Conformity  RoHS Directive (2011/65/EU) Declaration
 Pressure Equipment Directive (2014/68/EU) Declaration
 EMC Directive (2014/30/EU) Declaration

Explosion safety Inductive Ring Sensor Pepperl + Fuchs Model: RC10-14-N3-Y53478

"Intrinsic Safety Pepperl + Fuchs Model: RC15-14-N3-Y53479
(ia)"  Non-Hazardous Locations
Power Supply Nominal Voltage 8V Operating Voltage 5...25V
Current consumption Active area clear : 3mA (at 8V)
Active area obscured: 0.5...0.95mA (at 8V)
Ambient Temperature 0°C to 40°C

Hazardous Location II 2 G Ex ia IIC T6…T1 Gb IP67

 ATEX Refer to ATEX Certificate for: Input parameters, Pepperl + Fuchs
Max Ambient Temperature, Special conditions for PTB 99 ATEX 2128 X
IECEX use

 FM Approvals Class I, Division 1, Group A, B, C, Class II, Division Pepperl + Fuchs

Group E, F, G, Class III, Division 1 Control Draw ing:116-
Class I, Zone 0, Group IIC T6 0165G

 Canadian Registration Number (CRN) CRN

7
 Model Code
Code Description Code Option Option Description
I-IV. Basic Model Number 1350 65mm Sho-Rate Size 1-6 Flow Indicator
1355 150mm Sho-Rate Size 1-6 Flow Indicator

V. Model Revision Level G Revision G

VI. End Block Material A 316 stainless steel

B Brass

VII. Tube 1350 1355

A --- R-2-15-A G
B --- R-2-15-B G
C --- R-2-15-C G
D --- R-2-15-D G
E --- R-6-15-A G
F --- R-6-15-B G
G R-2-65-A G R-2-15-AAAA G
H R-2-65-B G ---
J R-2-65-C G ---
K R-2-65-D G ---
L R-6-65-A G ---
M R-6-65-B G ---
N1 No Tube No Tube

VIII-IX. Float & Direct Read Float Accuracy Scale Inscription

Scale Selection ZZ3 None N/A N/A
1A 2
GLASS STD-50(10%), 55(5%) MM
1B 2
ST.STL STD-50(10%), 55(5%) MM
1C 2
SAPPHIRE STD-50(10%), 55(5%) MM
1D 2
CARBOLOY STD-50(10%), 55(5%) MM
1E 2
TANTALUM STD-50(10%), 55(5%) MM
1G GLASS CALIB-50(5%), 55(3%) MM
1H ST.STL CALIB-50(5%), 55(3%) MM
1J SAPPHIRE CALIB-50(5%), 55(3%) MM
1K CARBOLOY CALIB-50(5%), 55(3%) MM
1L TANTALUM CALIB-50(5%), 55(3%) MM

2A 2
GLASS STD-50(10%), 55(5%) LINEAR
2B 2
ST.STL STD-50(10%), 55(5%) LINEAR
2C 2
SAPPHIRE STD-50(10%), 55(5%) LINEAR
2D 2
CARBOLOY STD-50(10%), 55(5%) LINEAR
2E 2
TANTALUM STD-50(10%), 55(5%) LINEAR
2G GLASS CALIB-50(5%), 55(3%) LINEAR
2H ST.STL CALIB-50(5%), 55(3%) LINEAR
2J SAPPHIRE CALIB-50(5%), 55(3%) LINEAR
2K CARBOLOY CALIB-50(5%), 55(3%) LINEAR
2L TANTALUM CALIB-50(5%), 55(3%) LINEAR

3A 2
GLASS STD-50(10%), 55(5%) CUSTOM DECAL
3B 2
ST.STL STD-50(10%), 55(5%) CUSTOM DECAL
3C 2
SAPPHIRE STD-50(10%), 55(5%) CUSTOM DECAL
3D 2
CARBOLOY STD-50(10%), 55(5%) CUSTOM DECAL
3E 2
TANTALUM STD-50(10%), 55(5%) CUSTOM DECAL
3G GLASS CALIB-50(5%), 55(3%) CUSTOM DECAL
3H ST.STL CALIB-50(5%), 55(3%) CUSTOM DECAL
3J SAPPHIRE CALIB-50(5%), 55(3%) CUSTOM DECAL
3K CARBOLOY CALIB-50(5%), 55(3%) CUSTOM DECAL
3L TANTALUM CALIB-50(5%), 55(3%) CUSTOM DECAL

4A 2
GLASS STD-50(10%), 55(5%) PERCENT SCALE
4B 2
ST.STL STD-50(10%), 55(5%) PERCENT SCALE
4C 2
SAPPHIRE STD-50(10%), 55(5%) PERCENT SCALE
4D 2
CARBOLOY STD-50(10%), 55(5%) PERCENT SCALE
4E 2
TANTALUM STD-50(10%), 55(5%) PERCENT SCALE
4G GLASS CALIB-50(5%), 55(3%) PERCENT SCALE
4H ST.STL CALIB-50(5%), 55(3%) PERCENT SCALE
4J SAPPHIRE CALIB-50(5%), 55(3%) PERCENT SCALE
4K CARBOLOY CALIB-50(5%), 55(3%) PERCENT SCALE
4L TANTALUM CALIB-50(5%), 55(3%) PERCENT SCALE

8
 Model Code
Code Description Code Option Option Description
X. Tube Packing and O-ring Materials Tube Packing O-ring Meter/Valve
A Buna Buna
Note: If valve assy is not required for B Viton Viton
a specific model number, select the D Viton EPR
proper code for the O-ring material of E Viton Kalrez
the Sho-Rate. F Teflon Buna
G Teflon Viton
J Teflon EPR
K Teflon Kalrez
L EPR EPR
N No Packing Buna
P No Packing Viton
R No Packing EPR
S No Packing Kalrez
T No Packing Butyl

XI. End Fitting Material, Fitting Material Connection Size and Type
Connection Size & Type C 316SS 1/8” NPT
F 316SS 1/8” NPT Thd.W/Locknut
J 316SS 1/4” NPT
N 316SS 1/4” NPT Thd.W/Locknut
R 316SS 1/8” Compression
U 316SS 1/8” Compression w/locknut (2 pc design)
W 316SS 1/4” F-Rc Thd w/Locknut
X 316SS 1/4” Compression
1 316SS 1/4” Compression w/locknut (2 pc design)
3 316SS 3/8” F-Rc Thd w/Locknut
41 316SS 1/4” I.D. Hose
51 316SS 1/4" I.D. Hose w/Locknut
6 316SS Integral 5/16-24 thd.
7 316SS 1/4” VCR
81 316SS 6mm Compression

XII. Valve Type A Valve Plug

B NRS-316SS #1
C NRS-316SS #2
D NRS-316SS #3
E NRS-316SS #4
F NRS-316SS #5
G NRS-316SS #6
N To Integrally Mounted 88/8900 316SS Flow Controller - Cartridge II/III Valve - Teflon Diaphragm
P To Integrally Mounted 88/8940 316SS Flow Controller - NRS Valve - Teflon Diaphragm
Q To Integrally Mounted 88/8900 Brass Flow Controller - Cartridge II/III Valve - Buna Diaphragm
R To Integrally Mounted 88/8940 Brass Flow Controller - NRS Valve - Buna Diaphragm
S Std. Valve Cavity - no valve assy or plug
T Cartridge III Valve - Low Flow - 316SS
U Cartridge III Valve - Med Flow - 316SS
V Cartridge III Valve - HighFlow - 316SS

9
 Model Code
Code Description Code Option Option Description
XIII. Valve Cavity/Controller Location & Valve/Controller Connection Orientation
Connection Orientation Location Inlet Outlet
1 Inlet Back Back
5 Outlet Back Back

XIV. Alarms A None

B 1 Inductive Ring Sensor/Switch
Note: Alarm options not available with C 2 Inductive Ring Sensors/Switches
the following: D 1 Inductive Ring Sensor/Switch w/I.S. Relay 120V (bistable)
- Glass, Sapphire, or Tantalum Floats E 1 Inductive Ring Sensor/Switch w/I.S. Relay 240V (bistable)
- Stainless Steel Frame Option F 2 Inductive Ring Sensors/Switches with I.S. Double Relays 120V (bistable)
- Valve Type Option: Flow Controllers G 2 Inductive Ring Sensors/Switches with I.S. Double Relays 240V (bistable)

XV. Options A None

B 316 Stainless Steel Frame
C Baseplate (Plastic Triangle Base with Aluminum Bracket)
D No Brooks Identification
E 316SS Frame & No Brooks ID
F Baseplate & No Brooks ID
G 316SS Frame & Baseplate
H 316SS Frame & Baseplate & No Brooks ID
J Stainless Steel Tag & 316SS Frame
K Stainless Steel Tag & Baseplate (Aluminum)
L Stainless Steel Tag & no Brooks ID
M Stainless Steel Tag & 316SS Frame & No Brooks ID
N Stainless Steel Tag & Baseplate & No Brooks ID
P Stainless Steel Tag & 316SS Frame & Baseplate
Q Stainless Steel Tag & 316SS Frame & Baseplate & No Brooks ID
R Stainless Steel Tag
S Stainless Steel Float Stops
T Open Alarm Frame
U 316SS Frame & Stainless Steel Float Stops

XVI. Certifications A None

B CRN Certification
C International Calibration Certification (5%-1350, 3%-1355)
D Degrease for Oxygen Service (not MIL Spec)
E CRN Cert & ICC
F CRN Cert & Degrease for O2
G Degrease for O2 & ICC
H CRN Cert, ICC & Degrease for O2

1
The options indicated are not available with a CRN certification. Not valid for controllers.
2
Accuracy for air and water in the preceding capacity tables will be STD-50(5%), 55(3%).
3
Use this code (ZZ) only when Tube Code above is “N”

Sample Standard Model Code

I-IV V VI VII VIII-IX X XI XII XIII XIV XV XVI
1350 G A G 1B E C A 1 A A A

10
 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.
START-UP SERVICE AND IN-SITU CALIBRATION
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.
SEMINARS AND TRAINING
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 to four products, all specifications are
subject to change without notice.

TRADEMARKS
Brooks, NRS, Sho-Rate.............................. Brooks Instrument, LLC
All other trademarks are the property of their respective owners.
Data-Sheet-1350G-EN/2025-01

2025