Inline Style Dispersion Flow Meter (ATMFIL)

Inline Style Dispersion Flow Meter (ATMFIL)


Inline Style Dispersion Flow Meter (ATMFIL)


Approvals: CE, DC Powered: CSA C22.2, UL1604, Atex Ex nA IIC T4, and Class I, Div 2, Grps BCD T4"; "DC and AC

Temperature: - IL <392°F(200°C)
- IS 158°F (70°C) remote

Styles: - Insertion (IS)
- Inline (IL)

Diameters: > 2 < 40" (50-1000mm) (IS)

Special Features: Displays numerical and graphical Calibration milliwatts (mw) for ongoing diagnostics, limited Ex approvals

Outputs: - Analog
- Modbus Compliant RS485 RTU communications

SMC inline mass Flowmeters are thermal dispersion type, utilizing the constant temperature difference method of measuring Gas Mass Flow Rate. It contains two reference grade platinum RTD sensors clad in a protective 316 SS sheath. Features include direct mass flow measurement for gases, wide range-ability, low pressure drop, excellent low end sensitivity, and no moving parts. 

The SMC ATMF series is microprocessor based and does not have any potentiometers. Electronics can be Integral Style, or remote mount with rugged, windowed dual compartment enclosure with local or remote display. Four models are available ranging from the low-cost blind meters to the more advanced SP models.


  • Direct mass flow measurement of any gas with actual gas calibration
  • Opto-isolated outputs, with graphic display
  • Tracking of overall gas consumption over a turndown ratio of at least 100:1
  • Up to four independent, switchable flow curves
  • High contrast photo-emissive OLED display with rate, total, temperature and graphic display
  • User-selectable engineering units, dynamically converts the flow rate and total flow
  • Can measure higher velocity than any other thermal mass meter – up to 203 m/s
  • Display calibration milliwatt (mw) for ongoing diagnostics
  • Standard software available multi-curve fit programs
  • Low power dissipation under 2W
  • Flow condioners included with all meters
Process Connections: Threaded, Flanged
Process temperature: 32 to 392 °F (0 to +200 °C)
Operating pressure: 1000 PSIG (69 barg)
Mass Flow rate: See model selection guide section
Accuracy (and linearity): ±[1% of Reading + (.5% FS)] ± 0.2% of Full Scale
Repeatability: ± 0.25% of Full Scale
Flow units: Kg/hr, Kg/mn, Kg/s Lbhr, Lb/m Lb/s, NCMH, SCFM, NLPM, SLPM, Mt/s, F/mn, BTU/Hr, BTU/min
Turn down ratio: Over 100:1
Material : 316SS as per DIN 1.4571 (AISI 316 Ti)
Gas temperature effect: 0.01% /° C
Response Time: Less than one second
Housing Protection: NEMA 4,Class 1, Div 1, Groups B, C, & D
Display Parameters: Flow, Total flow, Switch settings, Temperature, Elapsed time
Signal Interface: RS232 & RS485, MODBUS
Ex-protection: II 2 GD EEx d IIC T2 or T3
Cable (remote version): 300 meters
Wetted materials: 316 SS (std) Hastelloy (optional)
Power requirements : 115VAC @, A 230VAC @ A24 VDC @ ¼A
Linear signal output: 0-5 VDC & 4-20 mA
NIST traceable: Standard for all calibration
Data storage: EPROM storage up to 10 years
Pulse Output: scalable
Power Consumption: 2 Watts or less
Relays: Two 1-amp, SPDT, User-selectable alarm functions
weight (approximate) – integral type: ¼” to 1″: 2.2 to 8.8 lbs (1 to 4 Kg)1¼” to 2½”: 4.4-6.6 lbs (2-3 Kg)3 and 4″: 8.8-11 lbs (4-5 Kg)
weight (approximate) – remote type: ¼” to 1″: 6.6 to 13.2 lbs (3-6 Kg)1¼” to 2½”: 13.2-17.6 lbs (6-8 Kg)3 and 4″: 16.8-22 lbs (8-10 KG)

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