5850EC4BD3LB2A is a configured Brooks Instrument 5850E thermal mass flow controller identifier observed in Sonisys auction history. Official Brooks 5800E / 5850E documentation describes the 5850E as an elastomer-sealed analog gas mass flow controller with 0-5 Vdc command and flow output, card-edge or 15-pin D connector options, soft-start and valve-override functions, and nitrogen-equivalent ranges within the 5850E family. Stored auction evidence for this exact configured code identifies H2 as the observed gas context, but exact gas calibration, full-scale range, valve state, fitting, connector, and seal package must be verified from the unit label or calibration paperwork
Unit-specific configuration
Observed configuration
Historical listing records identify this part as H2. 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
Device type
Elastomer-sealed analog thermal mass flow controller
Series family
Brooks 5800E Series / Model 5850E
Configured code
5850EC4BD3LB2A is treated as a configured 5850E model-code identifier; the suffix should be verified against the physical nameplate before assuming gas, flow range, valve state, fittings, connector, or seal material
Configuration
Configured-unit rule
Gas, full-scale range, fitting, valve state, connector, and seal package vary by configured model code and calibration
Function
Control architecture
Brooks 5850E documentation describes a flow sensor, control valve, and integral electronic control system used to produce stable gas flow
Flow
5850E N2-equivalent flow range context
Brooks 5800E data-sheet context lists the 5850/5860 row with 0.003 slpm minimum full scale and 30 slpm maximum full scale nitrogen equivalent
Performance
5800E accuracy context
Brooks 5800E documentation lists +/-1% full scale accuracy including linearity at calibration conditions, with higher-flow variants specified separately
5800E repeatability context
Brooks 5800E documentation lists 0.25% of rate repeatability and reproducibility
5800E control range context
Brooks 5800E documentation lists 50:1 control range
5800E response context
Brooks 5800E documentation lists less than 3 seconds settling time to within +/-2% full scale for a 0-100% command step
Pressure
5850E pressure rating context
Brooks 5800E data-sheet context lists a 1500 psi / 100 bar standard pressure rating for the 5850/5860 model row
Controller pressure differential context
Brooks 5800E documentation lists 5 to 50 psi differential pressure for 5850E controller configurations, with minimum pressure drop dependent on gas and range
Environmental
Operating temperature context
Brooks 5800E documentation lists 5 C to 65 C operating temperature range
Brooks 5850E documentation lists 1/4 inch compression fittings for flow rates up to 10 slpm, 3/8 inch compression fittings for higher flow rates, and optional VCO and VCR connections
Electrical
Electrical connection context
Brooks 5800E documentation lists card-edge connector and 15-pin male Sub-D DA-15P connector options for controller models
Brooks 5800E / 5850E documentation lists 0-5 Vdc output into a 2000 ohm or greater load
Power requirement context
Brooks 5850E documentation lists +/-15 Vdc supply requirements; current draw depends on normally closed or normally open valve configuration and flow range
Controls
Valve override
Brooks 5850E documentation describes valve override for fully opening or closing the control valve independent of command setting
Soft start
Brooks 5850E documentation describes soft start as a flow-ramping function for processes that cannot tolerate rapid flow transition
Applications
Application domain
Semiconductor, laboratory, analytical, chemical and petrochemical research, fuel cell, life science, and general gas handling applications
Observed variants
Stored auction gas context
Stored auction records for this exact configured code identify H2 in three listing records; no full-scale flow value was verified from official documentation
