LOW-ΔP-FLOW F-101EI MFM

Thermal Mass Flow Meters for low pressure drop or corrosive gas applications, industrial style

Bronkhorst^® model F-101EI Mass Flow Meters (MFMs) are suited for precise measurement of flow ranges between 0,028…1,4 l_n/min and 0,24…12 l_n/min (N₂-equivalent). The instruments are particularly suited for corrosive gases or applications with very low differential pressure (∆P). Compared to conventional instruments, LOW-∆P-FLOW meters have larger flow channels to minimize the risk of clogging, facilitate cleaning and purging, and cause lower pressure drop (the sensor only requires 0,5 to 5 mbar). This 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.

The integrated digital pc-board provides signal and fieldbus conversion as well as PID controller functionality for optional mass flow control by means of a (separately mounted) control valve. 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. 0,028…1,4 l_n/min max. 0,24…12 l_n/min (based on N₂)









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




Repeatability	< 0,2 % RD
Turndown ratio	1:50 (2…100%)


Max. operating pressure	10 bar g











Multi fluid capability	Storage of max. 8 calibration curves
Response time (sensor)	1 … 2 sec.









Operating temperature	-10 … +70 °C; for ATEX cat. 3 and FM Class 1 Div 2 : 0…50°C


Mounting	horizontal
Temperature sensitivity	< 0,1 % FS/°C








Pressure sensitivity	0,1% Rd/bar typical N₂



Leak integrity, outboard	tested < 2 x 10^-9 mbar l/s He




Warm-up time	30 min. for optimum accuracy 2 min for accuracy ± 2% FS

Mechanical parts







Material (wetted parts)	stainless steel 316L or comparable; other on request








Process connections	stainless steel 316L or comparable; other on request

Seals	standard: FKM/Viton®; options: EPDM, FFKM/Kalrez®, FDA and USP Class VI approved compounds
Weight	0,9 kg
Ingress protection	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

extra for fieldbus
<75 mA
<50 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

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
LOW-ΔP-FLOW Brochure

Manuals
General manual digital instruments
Operating instructions digital instruments
Quick start guide LOW-dP-FLOW industrial style

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