Gas Mass Flow Controllers

EL-FLOW Select F-201CV

These gas mass flow controllers & meters can be paired with your pressure reactor to allow accurate measurement and control of flow ranges between 0,16…8 mln/min and 0,5…25 ln/min at operating pressures between vacuum and 64 bar.

The mass flow controller consists of a thermal mass flow sensor, a precise control valve and a microprocessor based PC board with signal and fieldbus conversion.  As a function of a setpoint value, the flow controller swiftly adjusts the desired flow rate.

Key features of these mass flow controllers include:

  • High accuracy
  • Fast response, excellent repeatability
  • Optional Multi Fluid / Multi Range functionality
  • Virtually pressure and temperature independent
  • Compact design

The 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.

Other models/specifications are also available.

Talk to us today about your complete pressure reactor system requirements.

Measurement / Control System

Flow range (intermediate ranges available) min. 0,16…8 mln/min
max. 0,5…25 ln/min
(based on N2)
Accuracy (incl. linearity) (based on actual calibration) ± 0,5 % RD plus ±0,1%FS
Repeatability 0,2 % RD
Turndown ratio up to 1:187,5 (1:50 in analog mode)
Multi fluid capability storage of max. 8 calibration curves;
optional Multi Gas / Multi Range functionality up to 10 bar abs
Settling time (in control, typical) standard: 1…2 seconds
option: down to 500 msec
Control stability < ± 0,1 % FS (typical for 1 ln/min N2)
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
Max. Kv-value 6,6 x 10-2
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 (PN) 64 bar abs
Process connections compression type or face seal (VCR/VCO) couplings
Seals standard: Viton®;
options: EPDM, Kalrez® (FFKM), FDA and USP Class VI approved compounds
Weight 0,6 kg
Ingress protection IP40

Electrical Properties

Power supply +15 … 24 Vdc
Max. power consumption
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: PROFIBUS DP, CANopen®, DeviceNet™, PROFINET, EtherCAT®, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK, 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);
CANopen® / DeviceNet™ 5-pin M12-connector (male);
FLOW-BUS/Modbus-RTU/ASCII RJ45 modular jack
Modbus TCP / EtherNet/IP / POWERLINK 2 x RJ45 modular jack (in/out);
EtherCAT®/ PROFINET 2 x RJ45 modular jack (in/out)

UK / Europe / Global Delivery

Developed in collaboration with our clients / Bespoke design service

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Asynt’s unique range of innovative and sustainable products/services are developed by chemists for chemists - to make your lab life easier.

Martyn Fordham, MD

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