The exact measurement of air and gas velocities is useful for different applications such as:

Energy saving / Energy efficiency
Determination of consumer data
Quality assurance of processes
Warranty in security of persons and appliances
Control of ventilators, dampers
Functional control

SCHMIDT® Flow Sensors, working on the basis of thermal measuring principle, offer the Schmidt solution for many tasks. Simple installation and fast initial operation on site are their typical features. For the volume flow measurement no further measuring value such as pressure or temperature is required due to the measuring principle. Extreme measuring range limits with a sensor permit the measurement of so-called standby as well as operating volume flows. The flow sensors operate continuously for years – without any wearing parts!

For each application three different designs are available for selection.

The dumb-bell head is dirt and dust resistent, easy to clean and measures flows from 0.06 m/s on.
The chamber head offers a very wide measuring range up to 200 m/s as well as the output of the medium temperature, if required.
The thermopile head is used in clean gases for smallest flows and for detection of flow direction.

SCHMIDT® Flow Sensors for Industrial Processes

For supervision and control in industrial processes the thermic SCHMIDT® Flow Sensors provide many benefits:

Direct detection of norm flow velocity independent of pressure and temperature
Highly accurate and reproducible – documented by ISO – calibration certificates
Available in ATEX-version for use in explosion-protected environments
Sensors with dumb-bell head and special coating are suitable for dusty and / or aggressive gases
Applicable up to +350 °C medium temperature
Suitable in different gases and gas mixtures – up to 16 bar overpressure

Flow Sensors for Cleanroom

SCHMIDT® Flow Sensors for Cleanroom For measurements in cleanrooms the thermic SCHMIDT® Flow Sensors provide many benefits:

Direct detection of flow velocity from 0.05 m/s
Cleanroom suitable – no moving parts, no grit (IP65 – IP67 degree of protection)
„Hygienic Design“ – easy cleanable dumb-bell head, disinfectable, hydrogen-peroxide resistant, suitable for VHP (Vaporized Hydrogen Peroxide) -method
In compliance with requirements of ISO 14644 regarding measuring range
„Bi-directional sensor“ enables the identification of over flow direction even during decrease of pressure
ISO-calibration protocol available – enables requirements of pharmaceutical industry
Easy to integrate in monitoring systems through variable data interfaces
Corrosion protection, resistant against aggressive process media (acid, brine, solvent)

Flow Sensors for Compressed Air

For measurements in compressed air systems the thermic SCHMIDT® Flow Sensors provide many benefits:

Direct detection of norm flow velocity independent of pressure and temperature
For tube diameters DN 15 ... DN 1.000
Installation and removal during production and under pressure possible
Very high flow velocities up to 200 m/s (also for undersized tubes)
Very small measuring range limit of 0.2 m/s for detection of leakage

Flow Sensors for air condition and ventilation systems

For measurements in air condition and ventilation systems the thermic
SCHMIDT® Flow Sensors provide many benefits:

Direct detection of norm flow velocity independent of pressure and temperature
For tube diameters DN 25… DN 1.000 or rectangular because of channels with feed size up to 2 m
Low maintenance and wearless – no moving parts
Ideally suitable for energy efficient controlling via wide measuring ranges
Relatively insensible against contamination
2 in 1: Sensors are additionally available with temperature measurement