Brooks Instrument GF125 Series Metal-Sealed Mass Flow Controller
About this part
GF125C-915928 is a configured Brooks Instrument GF125/GF100-family metal-sealed thermal mass flow controller identifier observed in Sonisys auction records. Official Brooks GF100/GF120/GF125 documentation supports family-level specifications for high-purity gas mass flow controllers and meters, but no verified official exact-part PDF or build sheet naming GF125C-915928 is currently available Stored exact auction evidence reports GF125CXXC wording and OEM- context without a reliable gas/range value; verify gas, full-scale range, protocol, fitting, valve state, surface finish, and customer-request options from the physical unit label before reuse
Configurations vary. Verify the exact unit before choosing a replacement.
Application classSemiconductor/high-purity gas delivery
CategoryFlow Control
Specifications
Identification
Part identifier
GF125C-915928
Device type
Configured Brooks Instrument metal-sealed thermal mass flow controller; exact controller-versus-meter and valve configuration should be verified from the unit label
Series documentation family
Brooks documentation groups GF100, GF101, GF120, GF120XSD, GF120XSL, GF121, GF125, and GF126 under the GF100 metal-sealed mass flow controller and meter documentation set
Observed model wording
GF125CXXC appears in stored exact auction evidence with GF125C-915928; treat it as observed model wording, not as a separate exact alias
Configuration
Configured-unit rule
Gas, full-scale range, communication interface, valve state, fitting package, surface finish, downstream condition, sensor orientation, and customer special request options vary by configured model code and should be confirmed from the physical label or Brooks configuration record
Applications
Application domain
Brooks GF100/GF120/GF125 family documentation positions these devices for semiconductor, MOCVD, thin-film, and high-purity gas flow-control applications requiring an all-metal flow path
Performance
GF125 family package context
Brooks model-code documentation identifies GF125 package/finish code 125 as the pressure-transient-insensitive GF package with 3 sccm to 55 slm N2-equivalent flow-range context, 300 ms to less than 700 ms response context, and 5 microinch Ra surface-finish context; applicability to this configured unit depends on its full model code
Flow accuracy
Official GF100/GF120/GF125 family documentation lists accuracy as +/-1% of set point over the upper controlled range and +/-0.35% full scale over the lower controlled range, based on factory N2 calibration; exact installed performance remains gas- and configuration-dependent
Settling time
Official GF125 family documentation lists normally closed valve settling-time bins from 300 ms for lower flow ranges through less than 700 ms for higher listed ranges; the applicable bin must be confirmed against the configured gas and range
Materials
Wetted path standard
Official GF100/GF120/GF125 family documentation describes SEMI F20 HP-compliant wetted materials for the family
Wetted materials context
Official family documentation lists wetted-material context including 316L VIM/VAR stainless steel, Hastelloy C-22, 316L stainless steel, 304 stainless steel, KM-45, and PCTFE where used on optional zero leak-by valve configurations
Leak integrity
External leak integrity
Official GF100/GF120/GF125 data-sheet tables list external leak integrity of 1 x 10^-10 atm cc/sec helium for documented family configurations
Controls
Communication interfaces
Brooks documentation covers Analog/RS-485, DeviceNet, RS485 L-Protocol, and EtherCAT variants for the GF100 family; the interface for GF125C-915928 must be read from the configured unit
Flow
Gas/range programmability
Brooks MultiFlo Configurator documentation supports GF1XX-series gas and range programming for applicable devices; do not infer a specific enabled gas table from the configured part number alone
Observed configuration
Stored auction gas/range combinations
No reliable gas/range table was extracted from stored exact-part auction titles for GF125C-915928
Stored listing observations
Stored exact-part auction evidence reports GF125CXXC wording and OEM- context with GF125C-915928; these observations do not create official model-wide specifications
