Flow measurement

for air, gases & liquids

Our standardized measurement elements are laminar flow elements (LFE), critical nozzles and venturi nozzles, which are combined with sensors and software from our company. This enables us to offer you complete systems that enable the output and conversion of the measured values into volume, mass and standard volume flow.

Our measurement systems LMF® – LaminarMasterFlow®, SMF® – SonicMasterFlow® and VMF® – VenturiMasterFlow® are used and configured as individual measurement systems or in combination with other measurement components in test benches. We can also offer you the ReciFlow ™, which is a flow meter for gases for low flows with highest accuracy.

Depending on the project, we choose the most suitable measuring element for your application. The table below gives an overview of the properties and advantages of the three measurement elements LFE, critical nozzles and venturi nozzles.

Flow measurement technologies

LMF® – LaminarMasterFlow®

High-precision flow measurement of gases and air using laminar flow elements (LFE).

SMF® – SonicMasterFlow®

High-precision flow measurement of gases and air using critical-operated laval nozzles.

VMF® – VenturiMasterFlow®

High-precision flow measurement of gases and air using venturi nozzles.

ReciFlow™

Highly precise, accurate and continuous flow measurement.

Flow generator

Simulating breathing air flows in medical industry.

Laminar Flow Elements

Laminar flow in fine capillaries for highest measurement accuracy.

Critical / Sonic nozzles

Flow with sonic speed through laval nozzles for highest measurement accuracy.

Applications

Calibration of flow meters e.g. gas meter, LFE, venturi nozzles, Mass Flow Meter (MFM)
Recurring calibration tasks e.g. adjustement test benches for production parts (valves, actuators, air mass meters, etc.)
Characteristic curve determination
Gas conditioning
Volume flow measurement

Features

High measurement accuracy

Low pressure drop

Large measurement range

Flexible use

Specification

	LMF® LaminarMasterFlow®	SMF® SonicMasterFlow®	VMF® VenturiMasterFlow®
Measurement section	Laminar Flow Elemente	Critical nozzles (sonic nozzles)	Venturi nozzles
Measurement principle	Differential pressure measurement at Δp 0.1 to 25 hPa using LFE	Constant flow through critical nozzle; different flows through nozzle combination	Differential pressure measurement at Δp 1 to 500 hPa using a venturi nozzle
Flow range	0.012…4000 m³/h	0.005…10,000 m³ / h	0.04…4000 m³/h
Measurement accuracy	0.5…1 % MV	0.2…0.3 % MV	0.5 % MV
Pressure range	Atmospheric up to max. 8 bar	Atmospheric, 1000 hPa absolute up to high pressure ranges taking into account the Joule-Thomsen effects	Atmospheric up to max. 500 bar
Medium	Air, other gases on request	Air, natural gas, other gases on request	Air, steam, other gases on request
Temperature range	0 up to 50 °C	Preferably at ambient temperature (20 to 30 °C)	Also suitable for higher temperatures
Key Benefit	Large measurement range of up to 1:100 by direct correlation between pressure drop and flow	High measurement accuracy and high long-term stability	Also suitable for extreme conditions (high temperatures, gases with dirt particles,…)