EL-FLOW Base F-202BB

Mass Flow Controller for Gases, Standard & Straightforward

  • Accurate mass flow measurement/control
  • Proven thermal bypass sensor
  • Fast response, excellent repeatability
  • Virtually pressure and temperature independent
  • Cost effective solution
Get a quote Downloads Support

Gas Mass Flow Controllers for OEM Applications

Bronkhorst® EL-FLOW® Base model F-202BB Mass Flow Controllers (MFCs) are standard and straightforard instruments suited for precise measurement and control of flow ranges between 1,4…70 ln/min and 4…200 ln/min at operating pressures between vacuum and 10 bar(g). EL-FLOW® Base instruments are equipped with a digital pc-board, offering high accuracy, excellent temperature stability and fast response. In addition to the standard analog I/O the MFCs also offer RS232 or Modbus-RTU or -ASCII communication.

EL-FLOW® Base is an economical solution for installation in (OEM) systems e.g. in coating or welding applications.

Technical specifications

Measurement / control system
Flow range, based on N2
(intermediate ranges available)
min. 1,4…70 ln/min
max. 4…200 ln/min

Accuracy (incl. linearity)
(based on actual calibration)

±1% FS
Turndown 1:50 (2...100%)
Repeatability < 0,2% Rd

Settling time (controller)

approx. 1 second
Max. Kv-value 3,5 x 10-1
Operating temperature 10…50°C
Temperature sensitivity zero: < 0,1% FS/°C; span: < 0,1% Rd/°C
Pressure sensitivity

< 0,15% Rd/bar at 4...10 bar(g);
< 0,25% Rd/bar at 1...4 bar(g);
< 0,5% Rd/bar at 0...1 bar(g)

Leak integrity, outboard tested < 2 x 10-9 mbar l/s He
Attitude sensitivity max. error at 90° off horizontal 0,2% FS at 1 bar, typical N2
Warm-up time 30 min. for optimum accuracy
2 min for accuracy ± 2% FS
Mechanical parts
Material (wetted parts) stainless steel 316L or comparable
Operating pressure 0...10 bar g
Process connections compression type or face seal couplings
Seals standard: Viton®; option: Kalrez® (FFKM)
Weight 2,3 kg
Ingress protection (housing) IP40
Electrical properties
Power supply +15…24 Vdc
Max. power consumption Supply
15 V
24 V
at voltage I/O
290 mA
200 mA
at current I/O
320 mA
215 mA
Analog output/command 0...5 (10) Vdc or 0 (4)…20 mA (sourcing output)
Digital communication RS232 or Modbus-RTU or -ASCII (RS485)
Electrical connection
Analog/RS232/Modbus(RS485) 9-pin D-connector (male)

Technical specifications and dimensions subject to change without notice.
For dimensional drawings and hook-up diagrams please visit the product page on our website


EL-FLOW Base Brochure

Manual EL-FLOW Base
Quick installation guide

Hook-up diagrams
Analog IO - RS232

Dimensional drawing
Dimensional drawing F-202BB

Bronkhorst High-Tech B.V.

Nijverheidsstraat 1A
NL-7261 AK Ruurlo (NL)
Tel. +31 573 45 88 00
[email protected]

Copyright © 2020 Bronkhorst. All rights reserved.     Sitemap     Disclaimer     Privacy note