FMT-Lx Turbine Gas Meter Flow Meter Group

FMT-Lx Turbine Gas Meter Flow Meter Group

FMT-Lx Turbine Gas Meter Flow Meter Group
The FMT-Lx series turbine meter is a robust meter, designed to perform on the highest level of accuracy. The meters comply with all international standards and are approved for custody transfer. The actual flow sensor, an exchangeable cartridge, has a build-in multi stage flow conditioner enabling the meter to be installed without any straight in- and outlet sections. All tested and proved according to the perturbation test as per international standards.

The cartridge can be pre-calibrated, under both low and high-pressure conditions, then exchanged on-site. The cartridge is supported in O-rings and isolated from the body, hence unaffected by any influences of the housing. The short length cartridge enables the use of larger sized cartridges than the size of the meter body. The approved maximum capacities of these kinds of meters are extremely high and similar to the capacities of ultrasonic meters.

To reduce transportation cost, optimize the corrosion protection, and improve safety in handling, the FMT-Lx series of turbine meters up to 6’’ (DN150) are also available with low weight aluminum meter bodies.


The operation of the FMT series of turbine meter is based on the measurement of the velocity of the gas. The flowing gas is accelerated and conditioned by the integrated multi-stage flow conditioner. The multi-stage flow conditioner prepares the gas flow profile by removing undesirable swirl and asymmetry before the gas flows over the freely rotating turbine wheel.

The dynamic forces of the flowing gas cause the rotor to rotate. The turbine wheel is mounted on the main shaft, with high-precision, low-friction ball bearings.

The turbine wheel has helical blades that have a known angle relative to the gas flow. The gas flow drives the turbine wheel at an angular velocity, which is proportional to the gas velocity. Using a gearing mechanism, the rotating turbine wheel drives the mechanical counter.


The standard FMT-Lx turbine meter is suitable for custody transfer gas measurement of all non-corrosive gases such as natural gas, propane, butane, air, nitrogen, hydrogen, etc. for low and high operating pressures. Special constructions can be supplied for use under extreme conditions like high temperatures or corrosive gases.  The FMT-Lx can be modified to perform as a master meter or transfer master meter.


Body (Standard): Low weight aluminum/steel Bearings: Stainless steel
Body (Optional): Low-temperature steel Shafts: Stainless steel
Cartridge: Aluminum Gears: POM
Straightening vane: Aluminum Index frame: Aluminum
Turbine wheel: Aluminum Index frame: Polycarbonate ECI
Bearing block: Stainless steel/aluminum


Metrological approvals:Compliant with EN12261:2002
 Compliant with EN12261: A1-2006
 Compliant with OIML R137 1&2 (2014)
 Compliant with MID 2014/32/EU
ATEX approvals:Sensors were compliant with Ex ia IIC T4... T6 Gb (-40ºC ≤ Ta +70ºC)
 Encoder is compliant with Ex ib IIB T3... T6 Gb (-25ºC ≤ Ta +55ºC)
Flow rates: 3 m3/h up to 40.000 m3/h
Nominal diameters: From DN50 to DN600 mm (2” to 24”).
Mounting position:Horizontally or vertically
BodyCompliant to Pressure Equipment Directive 2014/68/EU
Temperature Range:ATEX: -25°C to +70°C
 MID: -25°C to +70°C (lower temperatures on request)
 PED: -20°C to +70°C (lower temperatures on request)

Download Catalog: TURBINE METER SERIES FMT-Lx Flow Meter Group


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