IN-FLOW 'High-Flow' F-136BI mass flow meter

Industrial Style Gas Mass Flow Meters for high flow rates

Bronkhorst^® model F-136BI Mass Flow Meters (MFMs) are suited for precise measurement of flow ranges between 1…50 m³_n/h and 7,5...375 m³_n/h 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 or FM Class I, Div. 2 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 CANopen®, DeviceNet™, EtherCAT®, PROFIBUS DP, PROFINET, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK or FLOW-BUS protocols.

Technical specifications

Measurement / control system
Flow range (intermediate ranges available)	min. 1…50 m³_n/h max. 7,5…375 m³_n/h (based on N₂)









Accuracy (incl. linearity) (based on actual calibration)	± 1 % FS




Repeatability	< 0,2 % RD
Turndown ratio	1:50














Multi fluid capability	Storage of max. 8 calibration curves
Response time (sensor)	typical: 0,5 sec.









Operating temperature	-10 … +70 °C for ATEX cat. 3 and FM Class 1 Div 2 : 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 (PN)	400 bar abs. Note: Generally, Bronkhorst develops products for an infinite lifetime. For this model, for applications above 340 bar, the maximum allowable pressure cycles is limited to 680.000 cycles.





Process connections	compression type or face seal couplings

Seals	standard: FKM/Viton®; options: EPDM, FFKM/Kalrez®

Ingress protection	IP65

Electrical properties

Power supply

+15 … 24 Vdc

Max. power consumption

Supply
15 V
24 V

at voltage I/O
95 mA
65 mA

at current I/O
125 mA
85 mA

extra for fieldbus
<75 mA
<50 mA

Analog output

0…5 (10) Vdc or 0 (4)…20 mA (sourcing output)

Digital communication

standard: RS232;
options: CANopen®, DeviceNet™, EtherCAT®, PROFIBUS DP, PROFINET, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK or FLOW-BUS

Electrical connection
Analog/RS232	8 DIN (male);



PROFIBUS DP	bus: 5-pin M12 (female); power: 8 DIN (male);
CANopen® / DeviceNet™	5-pin M12 (male);

FLOW-BUS/Modbus-RTU/ASCII	5-pin M12 (male)

Modbus TCP / EtherNet/IP / POWERLINK	bus: 2 x 5-pin M12 (female) (in/out); power: 8 DIN (male);



EtherCAT®/ PROFINET	bus: 2 x 5-pin M12 (female) (in/out); power: 8 DIN (male);


IEC 61010-1	IEC-61010-1:2010 including national deviations for UL (61010-1:2012) and CSA (C22.2 No. 61010-1-12)

Control valve options

External actuator options to be connected to the controller

Certification for hazardous areas

Approvals / certificates

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/ASCII
PROFIBUS DP
Industrial Ethernet (EtherCAT, EtherNet/IP, Modbus-TCP, POWERLINK, PROFINET)
CANopen
Optional Bus and IO Configurations