MF51IA1BR2E2DEA identifies a Brooks Instrument Mf51i mass flow controller for measuring and controlling industrial-gas flow. The Mf51i has an integral solenoid control valve, remote setpoint capability, a removable sensor, and NEMA 4X/IP66 industrial packaging. Full-scale flow, calibration gas, process connections, elastomers, signal configuration, and approvals remain configured-unit attributes that must be confirmed from the instrument label, calibration record, or original order documentation
Configurations vary. Verify the exact unit before choosing a replacement.
10 to 100 slpm nitrogen-equivalent flow at 0°C and 101 kPa; configured full scale and calibration conditions are unit-specific
Control/usable range
50:1
Accuracy
±1% of full scale including linearity at calibrated conditions
Repeatability
0.25% of rate
Response time
Less than 6 seconds to within 2% of full scale of the final value for a 0-to-100% command change
Pressure
Mf51 differential pressure
10 to 50 psid pressure drop
Documented model-family maximum operating pressure
1000 psi (68 bar); the configured connection and instrument label govern the allowable unit pressure
Leak Integrity
External leak integrity
1 × 10^-9 atm·cc/s helium, excluding permeation
Electrical
Mf51 supply requirement
22 to 28 Vdc minimum operating range after applying the Mf51-specific 22 Vdc minimum note
Current requirement
309 mA at 22 Vdc; 370 mA at 28 Vdc
Setpoint inputs
4–20 mA (75 ohm input resistance) or 0–5 Vdc (220 kohm input resistance)
Flow outputs
0/4–20 mA or 0–5 Vdc
Control
Low-command cutoff
The valve closes when the command signal is below 1% of full scale
Valve override
Electrical override can latch the control valve fully open or fully closed
Family Options
Wetted-material options
Stainless steel with Viton fluoroelastomer or Buna-N; Kalrez was optional. The exact elastomer is not established for this identifier
Mf51 process-connection options
9/16-18 UNF, 1/4-inch tube compression, 3/8-inch tube compression, 1/4-inch VCR, or 1/4-inch VCO; the exact connection is not established for this identifier
Configured-Unit Identification
The manufacturer literature establishes the MF51I base model but does not provide a validated decoding structure for the remaining suffix.
Established base modelMF51I corresponds to the Brooks Mf51i industrial gas mass flow controller.
Unresolved suffixA1BR2E2DEA cannot be conservatively decoded from the available manufacturer literature.
Observed range context50 SLPM appears in an exact-match auction title but requires label or calibration-record confirmation before being asserted as the configured full scale.
Unit-specific attributesConfirm full scale, gas, reference conditions, process fittings, elastomers, valve configuration, signal selection, and approvals from the label, calibration certificate, or Brooks order record.
Electrical Terminal Functions
Documented terminal assignments for Mf-series controllers. Verify the instrument wiring diagram and supply requirements before connection.
