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Product Groups
Variable Area In-line Pneumatic Flowmeters
TRODEKS Engineering | Thermocouples, Pressure Transducers, Flow Meters, PID Controllers
FLMG Series
  • Monitoring Most Pneumatic or Compressed Gas Systems
  • Flow Rates From 1 to 900 SCFM @ 100 psi
  • High Pressure: to 600 psi for Brass or Aluminum, 1000 psi for Stainless Steel
  • High Temperature—to 116°C (240°F) Standard, 204 or 316°C (400 or 600°F) Optional
  • Mounts in Any Position
  • Relay Alarms and Analog Outputs Optional
  • Dual SCFM and SLPS Scales
 Manuals (contact with email : [email protected])


The FLMG flowmeters feature rugged construction, easy installation, and direct-reading flow rates of air. The units are calibrated at 100 psi pressure, suitable for most compressed pneumatic applications.

The spring-and-piston type assembly enables these flowmeters to be mounted in any position. The FLMG models with optionalanalog output (-MA) are typically used to transmit a signal proportional to the flow rate to a process controller, a PLC, arecorder, or a panel-mount display. With the -MA option, the user can choose between reading a 0 to 2000 Hz square-wave pulse, a 0 to 5 Vdc analog signal, or a 2-wire 4 to 20 mA analog signal by connecting the appropriate pins.

Measuring Accuracy: ±2.5% FS in the center third of the measuring range; ±4% FS over the entire scale range
Repeatability: ±1% FS
Flow Measuring Range: 1.2 to 900 SCFM
Maximum Operating Pressure:
   Aluminum and Brass Monitors: 40 bar (600 psig)
   Stainless Steel Monitors: 70 bar (1000 psig) up to 116°C (240°F)
Maximum Operating Temperature: 116°C (240°F)
Note: For options “-HT” and “-UHT”, see high-temperature graph on
Pressure Differential: See the pressure graphs on .
Standard Calibration Fluids: Air @ 21°C (70°F), 1.0 sg and 6.8 bar (100 psig)
Relay (Optional): 1 or 2 form “C” relays, rated 10 A, 125 or 250 Vac or ¼ A, 250 Vdc
Mechanical Life: >106 cycles
Analog Output (Optional): Supply voltage 12 to 35 Vdc, field selectable for 0 to 5 Vdc (100 W minimum load), 0 to 2000 Hz square-wave pulse or 4 to 20 mA
Rmax = 50 (Vs - 12)
(Vs = supply voltage DC)
Installation Dimensions:
   1/4 and 1/2 NPT Sizes: 1-7/8 OD x 6-9/16" length
   3/4 and 1 NPT Sizes: 2-3/8 OD x 7-5/32" length
   1-1/4 and 1-1/2 NPT Sizes: 3-1/2 OD x 10-1/8" length

Materials of Construction (Wetted Parts)
Description Aluminum Brass Stainless Steel
High pressure casing, end ports and tapered shaft Aluminum Brass 304 SS
Seals Buna (std), EPR, FKM or perfluoroelastomer Buna (std), EPR, FKM or perfluoroelastomer FKM with PTFE backup (std) Buna, EPR or perfluoroelastomer
Transfer Magnet PTFE-coated Alnico PTFE-coated Alnico PTFE-coated Alnico
Floating Orifice Disk Stainless Steel Stainless Steel Stainless Steel
All Other Internal Parts Stainless Steel Stainless Steel Stainless Steel

Materials of Construction (Non-Wetted Components)
Description Aluminum Brass Stainless Steel
Window Tube Polycarbonate (std), Pyrex® Polycarbonate (std), Pyrex® Polycarbonate (std), Pyrex®
Window Seals Buna (std) Buna (std) Buna (std)
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