Brooks 5863S/BE1AA0BA0BA1B1 is a microprocessor-based thermal mass flow meter for gas measurement. The configured unit has 9/16-18 UNF body ports without adapters, Viton seals, no control valve, 4–20 mA and 1–5 V flow outputs, standard calibration, +24 Vdc power, and safe-area classification. The BE selection places its calibrated full scale within 100–200 ln/min, N₂-equivalent at 0 °C and 1013.25 mbar; the exact full scale and calibration gas are not encoded
Configurations vary. Verify the exact unit before choosing a replacement.
Application classIndustrial automation and process equipment
CategoryMass Flow Measurement
Specifications
Identification
Manufacturer
Brooks Instrument
Series
5800-S Smart Series
Complete model code
5863S/BE1AA0BA0BA1B1
Function
Instrument type
Thermal mass flow meter; meter only, with no control valve
Flow configuration
Full-scale selection band
100–200 ln/min, N₂-equivalent at normal conditions of 0 °C and 1013.25 mbar; exact calibrated full scale is not encoded
Mechanical
Process connection
9/16-18 UNF body ports without adapters
Materials
Wetted construction
Stainless steel with Viton seals
Electrical
Analog flow outputs
4–20 mA and 1–5 Vdc
Main connector
15-pin D-type connector
Communications
Ordering selection
A0 — no separately ordered communication option; the manufacturer table notes RS-232 communication remains possible at 9600 baud
Accessories
Interconnection selection
Mating connector only; no cable selected
Calibration
Calibration selection
Standard calibration included; gas, pressure, and exact full scale require the unit calibration record
Power
Supply selection
+24 Vdc
Meter consumption
80 mA at +24 Vdc ±10% for a non-PROFIBUS 5863S meter
Area classification
Selection
Safe area
Performance
Accuracy
±0.7% of rate plus ±0.2% of full scale at calibration conditions
Repeatability
±0.25% of rate
Rangeability
50:1 within stated accuracy
Annual stability
Less than ±0.5% of rate per year
Environmental
Ambient and process-gas temperature
0–70 °C
Temperature condition above 100 l/min
Gas and ambient temperatures must be equal
Pressure
5863S family rating
70 bar maximum; observe the configured unit label and process limits
PED category for this connection
Category 2
Leak integrity
Outboard helium leak rate
1 × 10^-9 mbar·l/s
Operation
Warm-up
Less than 10 minutes for 1% full-scale accuracy; 45 minutes for performance within specifications
Diagnostics
Alarm output
TTL open-collector output, maximum 30 Vdc and 25 mA
What Does BE1AA0BA0BA1B1 Mean?
The identifier is the configured suffix following Brooks base model 5863S.
Segment
Field
Interpretation
BE
Base model and full-scale band
5863S mass flow meter with a selected full scale within 100–200 ln/min; the exact calibrated value is not encoded
1A
Mechanical connection
Without adapters; 9/16-18 UNF body ports
A
O-ring/seat material
Viton seals; no valve seat is present because this is a meter
0
Valve type
Meter only; no valve
B
Electrical input/output
4–20 mA and 1–5 Vdc flow outputs; controller input is not applicable
A0
Communication and baud rate
No separately ordered communication option; Brooks notes RS-232 communication is possible at 9600 baud
B
Interconnection cable
Mating connector only
A
Enhancement
Standard-response selection
1
Calibration
Standard calibration included
B
Power input
+24 Vdc
1
Area classification
Safe area
Calibration and Gas Configuration
The ordering suffix confirms that standard calibration was included but does not identify the calibration gas, exact full scale, or calibration pressure.
Full-scale boundaryThe BE segment defines a 100–200 ln/min selection band, not one universal full-scale value.
Calibration gasVerify from the unit label or calibration certificate.
Substitute-gas useBrooks documents gas conversion factors but states that the meter is factory configured for a selected gas, pressure, and flow range.
