EX-FLOW F-131MX mass flow meter

Intrinsically Safe Gas Mass Flow Meters for low flow rates

Bronkhorst^® EX-FLOW Mass Flow Meters (MFMs) are suited for precise gas flow measurement in ATEX Zone 1 hazardous areas. The MFM should be connected to a power supply with galvanic isolation / preamplifier / readout system (located in the safe zone). See Bronkhorst^® E-8000 Series.

EX-FLOW model F-131MX covers flow ranges from 0,3...15 ml_n/min up to 0,4...20 l_n/min (N₂-equivalent) at operating pressures up to 400 bar.

The intrinsically safe measuring head of the flow meter is tested according to ATEX 114 Directive 2014/34/EU and approved under EC-Type Examination Number: KEMA 01ATEX1172, protection II 2 G Ex ib IIC T4 Gb.
Other certifications: IECEx (IECEx DEK14.0060) and TIIS (検・第TC21584号).

Technical specifications

Measurement / control system
Flow range (intermediate ranges available)	min. 0,3…15 ml_n/min min. 0,4…20 ml_n/min (based on N₂)









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




Repeatability	< 0,2 % RD
Turndown ratio	1 : 50 (in digital mode up to 1 : 150)
















Time constant	5 sec.








Operating temperature	-10 … +70 °C



Temperature sensitivity	zero: < 0.05% FS/°C; span: < 0.05% Rd/°C












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





Process connections	compression type or face seal (VCR/VCO) couplings

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

Ingress protection	IP65

Electrical properties
























Output signal	15 … 20 mA (linear) Terminal connection, cable gland M16x1,5
I/O signals via PS/Readout (located in safe area)	analog: 0…5 Vdc, 0…10 Vdc, 0…20 mA, 4…20 mA; digital: RS232, PROFIBUS DP, DeviceNet™, Modbus RTU or ASCII, PROFINET, EtherCAT®, FLOW-BUS

Electrical connection











Ex-proof measuring head	Terminal connection, cable gland M16x1,5

Control valve options

External actuator options to be connected to the controller

Certification for hazardous areas

Approvals / certificates

Downloads

Brochures
EX-FLOW brochure

Manuals
Manual EX-FLOW meters and controllers - ATEX
Manual EX-FLOW meters and controllers - IECEx
Manual EX-FLOW meters and controllers - TIIS

Hook-up diagram
MFM Measuring Head
XB-Coil
XC-Coil

Dimensional drawing
Dimensional drawing F-121MX-F-131MX

Certificates
IECEx Certificate EX-FLOW MFM Measuring Head X100 : IECEx DEK14.0060
TIIS Certificate EX-FLOW MFM Measuring head X100 : 検・第TC21584号 (Japanese certification)
KCs Certificate EX-FLOW MFM Measuring Head X100 :: Ex ib IIC T4 (Korean certification)
ATEX CAT 2 Certificate EX-FLOW MFM Measuring Head X100 : KEMA 01ATEX1172
EU Declaration of Conformity Measuring Head X100 : ATEX CAT 2 (doc. 9.06.032)
ATEX CAT 2 Certificate XB-coil
ATEX CAT 2 Certificate XC-coil
ATEX CAT 2 Notification Directive 2014/34/EU : DEKRA 12ATEXQ0100

EX-FLOW F-131MX

Intrinsically Safe Gas Mass Flow Meters for low flow rates

Technical specifications

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