Bronkhorst

EL-FLOW Select F-131M

High-Pressure Mass Flow Meter for Gases

  • High accuracy, excellent repeatability
  • Pressure rating 400 bar
  • Virtually pressure and temperature independent
  • Compact design
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EL-FLOW Select F-131M

Gas Mass Flow Meters for low flow rates

Bronkhorst® model F-131M Mass Flow Meters (MFMs) are suited for precise measurement of flow ranges between 0,3…15 mln/min and 0,4…20 ln/min at operating pressures up to 400 bar. The MFM consists of a thermal mass flow sensor and a microprocessor based pc-board with signal and fieldbus conversion and a PID controller for optional mass flow control by means of a separately mounted control valve.

EL-FLOW® Select series are equipped with a digital pc-board, offering high accuracy, excellent temperature stability and fast response. The main digital pc-board contains all of the general functions needed for measurement and control. In addition to the standard RS232 output the instruments also offer analog I/O. As an option, an on-board interface can be mounted to provide DeviceNet™, PROFIBUS DP, Modbus, EtherCAT®, PROFINET or FLOW-BUS protocols.


Technical specifications

Measurement / control system
Accuracy (incl. linearity)
(based on actual calibration)
±0,5% Rd plus ±0,1% FS
Turndown 1:50
Multiple fluid capability storage of max. 8 calibration curves
Repeatability < 0,2% Rd
Response time typical 0,5 sec
Operating temperature -10…+70°C
Temperature sensitivity zero: < 0,05% FS/°C; span: < 0,05% Rd/°C
Pressure sensitivity 0,1% Rd/bar typical N2; 0,01% Rd/bar typical H2
Leak integrity, outboard tested < 2 x 10-9 mbar l/s He
Attitude sensitivity max. error at 90° off horizontal 0,2% 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
Pressure rating 400 bar abs
Process connections compression type or face seal couplings
Seals standard: Viton®; options: EPDM, Kalrez® (FFKM)
Ingress protection (housing) IP40
Electrical properties
Power supply +15…24 Vdc
Max. power consumption
meter
Supply
15 V
24 V
at voltage I/O
95 mA
65 mA
at current I/O
125 mA
85 mA
Max. power consumption
controller
Supply
15 V
24 V
at voltage I/O
290 mA
200 mA
at current I/O
320 mA
215 mA
PROFIBUS DP add 53 mA (15 V supply) or 30 mA (24 V supply)
PROFINET add 77 mA (15 V supply) or 48 mA (24 V supply)
EtherCAT® add 66 mA (15 V supply) or 41 mA (24 V supply)
DeviceNet™ add 48 mA (24 V supply)
Analog output/command 0...5 (10) Vdc or 0 (4)…20 mA (sourcing output)
Digital communication standard: RS232;
options: PROFIBUS DP, DeviceNet™, PROFINET, EtherCAT®, Modbus RTU or ASCII, FLOW-BUS
Electrical connection
Analog/RS232 9-pin D-connector (male);
PROFIBUS DP bus: 9-pin D-connector (female);
power: 9-pin D-connector (male);
Devicenet™ 5-pin M12-connector (male);
EtherCAT®/ PROFINET 2 x RJ45 modular jack (in/out)
FLOW-BUS/Modbus-RTU/ASCII RJ45 modular jack

Technical specifications and dimensions subject to change without notice.

For dimensional drawings and hook-up diagrams please visit the productpage on our website

Downloads

Brochures
EL-FLOW Select brochure

Manuals
General manual digital instruments
Operating instructions digital instruments

Hook-up diagrams
Analog IO - RS232
DeviceNet
EtherCAT
FLOW-BUS
Modbus
Optional Bus and IO Configurations
PROFIBUS DP
PROFINET


Bronkhorst High-Tech B.V.

Nijverheidsstraat 1A
NL-7261 AK Ruurlo (NL)
Tel. +31 573 45 88 00
info@bronkhorst.com

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