Brooks Instrument Sho-Rate 1255A R1051 Air Flowmeter
About this part
1255AR1051MRSVV is a configured Brooks Instrument Sho-Rate 1255A low-flow glass tube variable-area flowmeter. Official Brooks 1250/1255 documentation identifies 1255A as the 150 mm tube flowmeter base model and lists R1051 in the Model 1255 millimeter-scale table with glass float, 3/16 inch float diameter, 2290 CCM air table value, and 50 CCM water table value. Exact distributor pages and stored Sonisys auction evidence corroborate the configured identifier and 0 to 2290 CCM air context; final service suitability still depends on the physical unit label, tube/float assembly, flow curve, valve arrangement, seals, pressure, temperature, and process fluid
Configurations vary. Verify the exact unit before choosing a replacement.
Application classLife sciences and laboratory automation
CategoryFlow Control
Specifications
Identification
Device type
Direct-reading glass tube variable-area flowmeter
Series family
Brooks Sho-Rate 1250/1255 Series
Configured model code
1255AR1051MRSVV
Base model context
Brooks model-code documentation identifies 1255A as the 150 mm tube flowmeter base model
Flow
Measuring principle
Variable-area rotameter with tapered borosilicate glass metering tube and metering float
Configured tube code context
Brooks 1250/1255 millimeter-scale tables list R1051 for Model 1255 with glass float, 3/16 inch float diameter, 2290 CCM air table value, and 50 CCM water table value
Observed exact-SKU range context
Exact distributor pages and stored Sonisys auction titles describe 1255AR1051MRSVV as an air variable-area flowmeter with 0 to 2290 CCM air range context
Performance
1255 accuracy context
Brooks 1250/1255 documentation lists Model 1255 accuracy as +/-3% full scale at reference conditions for listed gases
Repeatability
Brooks 1250/1255 documentation lists repeatability as 0.25% full scale
Pressure / Temperature
Series pressure and temperature rating
Brooks 1250/1255 documentation lists 200 psig from 33 deg F to 250 deg F / 13.8 bar from 1 deg C to 121 deg C; verify the configured unit and application before using this limit
Construction
Metering tube material
Borosilicate glass
Float material context
The R1051 tube entry uses float material code G, which Brooks identifies as glass
Brooks model-code documentation maps end-block material code S to 1/8 inch FNPT stainless steel
Controls
Valve context
Brooks model-code documentation includes no-valve, standard inlet-valve, and limited outlet-valve configurations; the V valve code is treated as standard inlet-valve context, subject to physical label confirmation
Seals
O-ring context
Brooks model-code documentation maps O-ring code V to Viton for stainless-steel configurations
Installation
Mounting context
Brooks family documentation describes panel integration, and exact distributor pages identify this manufacturer model as a panel-mount, vertical variable-area flowmeter
Configuration
Configured-unit rule
Tube, float, scale, connection, end-block material, valve arrangement, seal material, calibrated fluid, and flow curve vary by configured code and unit label
Applications
Application domain
Low-flow gas and liquid indication, panel-mounted flow indication, purge service, laboratory flow measurement, industrial flow measurement, air service, and OEM flowmeter applications
