Brooks Instrument 5800E Series Mass Flow Controller
About this part
5850E/B1A1B4B is a configured Brooks Instrument 5850E / 5800E Series elastomer-sealed analog thermal mass flow controller identifier. Official Brooks 5800E documentation describes the family as gas thermal mass flow meters and controllers for broad laboratory, analytical, fuel-cell, life-science, chemical, petrochemical, and semiconductor applications. stored and auction evidence shows the same configured code appearing with different gas and range contexts, including H2 0-1 ln/min, N2 0-3 slpm, N2 30 slpm, and HCl 0-200 sccm, so each physical unit must be verified from its label before using the gas/range value
Unit-specific configuration
Observed configuration
Historical listing records identify H2 at 0-1 ln/min. 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
Configured thermal mass flow controller
Series family
Brooks 5850E / 5800E Series elastomer-sealed analog gas mass flow controllers and meters
Configured part number
5850E/B1A1B4B
Function
Control function
Thermal mass flow measurement with precision control-valve regulation for gases
Configuration
Configured-unit rule
Gas, full-scale range, pressure drop, fittings, seal package, valve behavior, connector, power wiring, and calibration are unit-specific and must be read from the physical label and calibration records
Flow
5800E family flow range
Brooks 5800E family context covers gas flow ranges from low sccm ranges through high slpm ranges depending on model body and configuration
5850E model range context
5800E data-sheet context places the 5850E body among lower-flow 5800E controllers; stored and evidence for this configured code includes H2 0-1 ln/min, N2 0-3 slpm, N2 30 slpm, and HCl 0-200 sccm configured examples
Performance
Accuracy context
Brooks 5800E documentation lists accuracy as 1% full scale, with 1.5% full scale context for higher-flow ranges above 20 slpm
Repeatability
Brooks 5800E documentation lists repeatability as 0.25% of rate
Turndown / control range
Brooks 5800E documentation lists a 50:1 turndown ratio / control range
Limits
Maximum operating pressure context
Brooks 5800E documentation lists maximum pressure context up to 1500 psig; confirm the pressure rating and pressure drop for the exact configured unit
Operating temperature context
Brooks 5800E documentation lists operating temperature context of 5 C to 65 C
Materials
Wetted-material context
Brooks 5800E documentation identifies stainless steel wetted-material context with Viton standard seals and Kalrez or Buna-N optional seals, depending on configuration
Connections
Process connection context
Brooks 5800E documentation lists standard compression-fitting context with optional VCO and VCR connection configurations; verify the fittings on the physical unit
Electrical
Analog command and output
5800E Series configurations use analog 0-5 Vdc command and flow-output context depending on wiring option
Connector context
Brooks 5800E documentation lists card-edge and DA-15P D-type connector options; verify the connector on the specific unit
Controls
Valve behavior
5850E controllers use an internal precision control valve; valve state and valve override behavior must be checked against the unit wiring and controller setup
Applications
Application domain
Gas flow control in semiconductor, laboratory, analytical, fuel-cell, life-science, chemical, and petrochemical systems
Observed variants
Observed gas/range contexts
H2 0-1 ln/min, N2 0-3 slpm, N2 30 slpm, and HCl 0-200 sccm appear in stored or exact-part evidence; treat these as configured-unit examples, not universal specifications
Historical archive images for identification, labels, connectors, and condition reference, not current inventory.
Historical Listings & Prices
Historical listing data, not a current offer
Archive records6Tracked historical listing records
Historical median price$506.04Based on archived listing records
Recorded price range$250.00 - $2,719.08Low to high recorded listing price
Local documents2PDF copies available from Sonisys
Recorded price context
The typical recorded price range is $274.95 to $1,859.04. Based on 6 archived listing records; not a current offer, appraisal, or confirmed sale price.
View archived listing titles
Brooks 5850E/B1A1B4B Mass Flow Controller MFC,
Brooks Instrument mass flow controller 5850E/B1A1B4B
BROOKS INSTRUMENT 5850E/B1A1B4B, Mass Flow Controller, H2; 0-1 ln/min
1PC BROOKS 5850E/B1A1B4B Flowmeter N2 30slpm New fedex or DHL
BROOKS INSTRUMENT 5850E/B1A1B4B THERMAL MASS FLOW 5800E SERIES
Archived listings
Other Part Numbers & Aliases
5850E/B1A1B4B5850E-B1A1B4BBrooks 5850E/B1A1B4BBrooks Instrument 5850E/B1A1B4BBrooks Instrument mass flow controller 5850E/B1A1B4BBrooks 5850E/B1A1B4B Mass Flow Controller MFCBROOKS INSTRUMENT 5850E/B1A1B4B THERMAL MASS FLOW 5800E SERIESBROOKS INSTRUMENT 5850E/B1A1B4B, Mass Flow Controller, H2; 0-1 ln/min1PC BROOKS 5850E/B1A1B4B Flowmeter N2 30slpm fedex or DHL1PCS BROOKS gas mass flow controller 5850E/B1A1B4B N2 nitrogen, 0-3 slpmM121 BROOKS MFC, 5850E SERIES 5850E/B1A1B4B
