Sho-Rate Series
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DATA SHEET Variable Area Flow Meters Sho-Rate™ Models 1250 & 1255 Low Flow Glass Tube Flowmeters Sho-RateTM 1250/55 Series 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. Features • 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 View 1250 & 1255 Product Page

Product Specifications ±5% full scale at reference conditions* ±3% full scale at reference conditions* Materials of Construction Borosilicate Glass, Aluminum, 316 Stainless Steel, Clear Polycarbonate, Teflon® End Block Options Stainless Steel and Aluminum Packing Material Viton® fluoroelastomers, Buna Float Materials Glass, Sapphire, Stainless Steel, Carboloy®, Tantalum Connection Materials Stainless Steel and Aluminum Connection Options 1/8” NPT (w/locknuts) - Aluminum and Stainless Steel 1/4” NPT (w/locknuts) - Stainless Steel only Valve Options Cartridge Valve and Precision Valve Valve...

Threaded Jack Screw • Tubes sealed on compression gasket Metering Tube Assemblies • Heavy-wall, precision bore • Borosilicate glass • Removeable without disconnnecting instrument EZ-CHANGETM Interchangeable Tubes Assemblies with Direct Reading (DR) Scales on the Tube • Allows users to change ranges as the application dictates • DR Scale on Tube for standard fluids at reference conditions Rotating Polycarbonate Lens • 180° view of float with magnification Optional Valves for Inlet • Cartridge III Valves • Precision valves (For enhanced resolution of

Product Specifications - Capacity Table: Model 1250 Model 1250 Air ml/mim LPM Float Material Key (G) Black Glass (S) Sapphire (ST) Stainless Steel (C) Carboloy (T) Tantalum 4 SCFH Standard Ranges Extended Ranges 1 Extended Ranges 2 Standard Ranges SCFH Extended Ranges 2

Product Specifications - Capacity Table: Model 1255 SCFH Standard .05 - 1.15 Ranges Model 1255 Nitrogen ml/mim SCFH Standard Ranges Model 1255 Water ml/mim Model 1255 Oxygen ml/mim Standard Ranges Float Material Key (G) Black Glass (S) Sapphire (ST) Stainless Steel (C) Carboloy (T) Tantalum

Product Specifications - Capacity Table: Model 1250 Float Material Key (G) Black Glass (S) Sapphire (ST) Stainless Steel (C) Carboloy (T) Tantalum Select meters ship in 3 days. Max order quantity = 15 meters. Consult factory on orders of more than 15 Select meters ship in 3 days. Max order quantity = 15 meters. Consult factory on orders of more than 15

Product Dimensions Model 1250 Sho-Rate

Model Size & connections Quantity required Fluid Materials of construction a. End fittings (Aluminum or stainess steel) b. Elastomers (Viton or Buna) Fluid or mm scale with table Optional equipment a. Valve type or none Code Description Code Option Option Description I. Base Model Number 65 mm Tube Flowmeter 150 mm Tube Flowmeter Tube Number See Capacity Tables for appropriate Tube Number Air Millimeter with standard data tables Nitrogen Water ml/min LPM CCM GPM Millimeter SCFH GPH V. End Blocks Material (Wetted) 1/8” FNPT Aluminum 1/8” FNPT Stainless Steel 1/4” FNPT Stainless Steel VI....

Service & 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...