Brooks Instrument GF125 Series Metal-Sealed Mass Flow Controller
About this part
GF125C-105820 is a configured Brooks Instrument GF125/GF100-family metal-sealed thermal mass flow controller for semiconductor, MOCVD, thin-film, and high-purity process gas delivery. Official Brooks GF100/GF120/GF125 documentation covers the platform, performance context, materials, communication families, MultiFlo support, and installation guidance, but no verified official one-part specification for GF125C-105820 is currently available Stored Sonisys auction history associates this exact configured identifier with Brooks Instrument mass flow controller listings that report N2O 15000 SCCM context and AMAT 0190-49898-02 marking; verify gas, full-scale range, valve state, fitting package, communication option, and any customer or OEM marking from the physical unit label before reuse
Unit-specific configuration
Observed configuration
Historical listing records identify this part as N2O at 15000 SCCM. Exact gas, range, fittings, valve configuration, and communication interface must be verified from the physical unit label.
Configurations vary. Verify the exact unit before choosing a replacement.
Application classSemiconductor/high-purity gas delivery
CategoryFlow Control
Specifications
Identification
Part identifier
GF125C-105820
Device type
Metal-sealed thermal mass flow controller
Series family
Brooks GF100 / GF120 / GF125 metal-sealed mass flow controller and meter family
Applications
Application domain
Semiconductor, MOCVD, thin-film, and high-purity process gas flow control applications requiring an all-metal flow path
Performance
Family accuracy context
Brooks GF100/GF120/GF125 documentation lists +/-1% of set point above 35-100% and +/-0.35% full scale over 2-35% based on factory N2 calibration for applicable analog and DeviceNet configurations
Family repeatability context
Brooks GF100/GF120/GF125 documentation lists repeatability and reproducibility of +/-0.15% of set point from 5-100% and +/-0.015% full scale from 2-5%
Family settling-time context
Brooks GF100/GF120/GF125 documentation lists normally closed valve settling-time bins from 300 ms to less than 700 ms across documented flow bins, depending on configuration
Pressure transient insensitivity
Brooks GF100/GF120/GF125 data-sheet context identifies pressure transient insensitivity as a family feature for consistent mass-flow delivery under upstream pressure changes
Materials
Wetted path standard
Brooks GF100/GF120/GF125 documentation describes SEMI F20 HP compliant wetted materials
Wetted materials context
Brooks GF100/GF120/GF125 documentation lists wetted material context including 316L VIM/VAR, Hastelloy C-22, 316L stainless steel, 304 stainless steel, KM-45, and PCTFE on optional zero leak-by valve configurations
Leak integrity
External leak integrity
Brooks GF100/GF120/GF125 documentation lists external leak integrity of 1 x 10^-10 atm cc/sec helium for documented family configurations
Controls
Communication interfaces
Brooks documentation provides Analog/RS-485, DeviceNet, RS485 L-Protocol, and EtherCAT context for the GF100 family; the actual interface depends on the configured electronics option
Flow
Gas/range programmability
MultiFlo gas and range configurability is documented for supported GF1XX and GF-series devices
Ratings
Operating temperature context
Brooks GF100/GF120/GF125 documentation lists a 10 C to 50 C operating temperature range for documented family configurations
Configuration
Configured-unit rule
Gas, full-scale flow range, valve or meter configuration, fitting package, electrical connector, communication protocol, display, surface finish, seal package, and customer/OEM options vary by full configured model code
Observed configuration
Stored auction gas/range observations
Stored exact auction titles for this part report N2O 15000 SCCM context across 2 tracked listing records; this is listing-observed context, not an official Brooks specification
Observed customer/OEM marking
Stored exact auction titles and live surplus listings associate GF125C-105820 with AMAT 0190-49898-02 or 0190-49898 marking; this was not retained as an exact alias without official customer-part documentation
Additional live surplus observations
One live surplus listing for a mixed GF125C lot reports GF125C-105820 / 0190-49898 units with 2500 SCCM N2 and 30000 SCCM He contexts; these are listing-observed contexts only and may represent different stored configurations or relabeled units
