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Datasheet F-111AC

EL-FLOW Select F-111AC

Digital Thermal Mass Flow Meter for Gases

  • High accuracy, excellent repeatability
  • Optional Multi Fluid / Multi Range functionality
  • Virtually pressure and temperature independent
  • Compact design
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EL-FLOW Select F-111AC

Gas Mass Flow Meters for low/medium flow rates

Bronkhorst® model F-111AC Mass Flow Meters (MFMs) are suited for precise measurement of flow ranges between 0,4…20 ln/min and 2…100 ln/min at operating pressures between vacuum and 100 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 CANopen®, DeviceNet™, EtherCAT®, PROFIBUS DP, PROFINET, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK or FLOW-BUS protocols. The EL-FLOW® Select design features optional Multi Gas / Multi Range functionality, providing (OEM-) customers with optimal flexibility and process efficiency.

Technical specifications

Measurement / control system
Flow range (intermediate ranges available)min. 0,4…20 ln/min
max. 2…100 ln/min
(based on N2)
Accuracy (incl. linearity) (based on actual calibration)± 0,5 % RD plus ±0,1% FS
Repeatability< 0,2 % RD
Turndown ratioup to 1:187,5 (1:50 in analog mode)
Multi fluid capabilitystorage of max. 8 calibration curves;
optional Multi Gas / Multi Range functionality up to 10 bar abs
Response time (sensor)typical 0,5 sec.
Operating temperature-10 … +70 °C
Temperature sensitivityzero: < 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, outboardtested < 2 x 10-9 mbar l/s He
Attitude sensitivitymax. error at 90° off horizontal 0,2% at 1 bar, typical N2
Warm-up time30 min. for optimum accuracy
2 min. for accuracy ± 2% FS
Mechanical parts
Material (wetted parts)Stainless steel 316L or comparable
Pressure rating (PN)100 bar abs
Process connectionscompression type or face seal (VCR/VCO) couplings
Sealsstandard: FKM/Viton®;
options: EPDM, FFKM/Kalrez®, FDA and USP Class VI approved compounds
Weight0.6 kg
Ingress protectionIP40
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 output0…5 (10) Vdc or 0 (4)…20 mA (sourcing output)
Digital communicationstandard: RS232;
options: PROFIBUS DP, CANopen®, DeviceNet™, PROFINET, EtherCAT®, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK, FLOW-BUS
Electrical connection
Analog/RS2329-pin D-connector (male);
PROFIBUS DPbus: 9-pin D-connector (female);
power: 9-pin D-connector (male);
CANopen® / DeviceNet™5-pin M12-connector (male);
FLOW-BUS/Modbus-RTU/ASCIIRJ45 modular jack
Modbus TCP / EtherNet/IP / POWERLINK2 x RJ45 modular jack (in/out);
EtherCAT®/ PROFINET2 x RJ45 modular jack (in/out)
Control valve options
External actuator options to be connected to the controller
Certification for hazardous areas
Approvals / certificates

Technical specifications subject to change without notice.

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

Downloads

Brochures
EL-FLOW Select brochure
EL-FLOW Select flow range table
Manuals
Quick installation guide EL-FLOW Select
Manual EL-FLOW Select
Hook-up diagrams
Analog IO - RS232
DeviceNet
EtherCAT
FLOW-BUS
Modbus RTU/ASCII
PROFIBUS DP
PROFINET
CANopen
EtherNet/IP
Modbus-TCP
POWERLINK
Optional Bus and IO Configurations
Dimensional drawing
Dimensional drawing F-111AC
Dimensions Digital Cases
Dimensions Adapters
Solids 3D
F-111AC EL-FLOW
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Bronkhorst High-Tech designs and manufactures innovative instruments and subsystems for low-flow measurement and control for use in laboratories, machinery and industry. Driven by a strong sense of sustainability and with many years of experience, we offer an extensive range of (mass) flow meters and controllers for gases and liquids, based on thermal, Coriolis and ultrasonic measuring principles. Our global sales and service network provides local support in more than 40 countries. Discover Bronkhorst®!