Bronkhorst

IN-FLOW F-131MI

High-Pressure Mass Flow Meter for Gases, Industrial Style

  • High accuracy, excellent repeatability
  • Pressure rating 400 bar
  • Virtually pressure and temperature independent
  • Compact design
  • Rugged, weatherproof housing (IP65, dust and waterproof)
Get a quote Request a demo Support
IN-FLOWF-131MI

Gas Mass Flow Meters for low flow rates

Bronkhorst® model F-131MI 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. The IN-FLOW model is of rugged design (IP65) for use in industrial environments or even Zone 2 hazardous areas, with optional ATEX Cat. 3 approval.

IN-FLOW 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 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
Multi fluid capability

storage of max. 8 calibration curves

Repeatability < 0,2% Rd

Response time

typical: 0,5 seconds
Operating temperature -10…+70°C;
for ATEX cat. 3 0…50°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% 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
Pressure rating 400 bar abs
Process connections compression type or face seal couplings
Seals standard: Viton®; options: EPDM, Kalrez® (FFKM)
Ingress protection (housing) IP65
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)
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™, Modbus RTU or ASCII, FLOW-BUS
Electrical connection
Analog/RS232 8 DIN (male);
PROFIBUS DP bus: 5-pin M12 (female);
power: 8 DIN (male);
Devicenet™ 5-pin M12 (male);
FLOW-BUS/Modbus-RTU/ASCII 5-pin M12 (male)

Technical specifications and dimensions subject to change without notice.

Downloads

Brochures
IN-FLOW brochure

Manuals
General manual digital instruments
Operating instructions digital instruments

Hook-up diagrams
Analog IO - RS232
DeviceNet
FLOW-BUS
Modbus-RTU
PROFIBUS DP


Bronkhorst High-Tech B.V.

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

Copyright © 2018 Bronkhorst. All rights reserved.     Sitemap     Disclaimer     Privacy note